Hach Digesdahl 23130-20 Instrument Manual
  1. Manuals
  2. Brands
  3. Hach Manuals
  4. Laboratory Equipment
  5. Digesdahl 23130-20
  6. Instrument manual

Hach Digesdahl 23130-20 Instrument Manual

Digestion apparatus
Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
客服：400 688 9809
网址：www.mamots.com
电话：0431-85178766

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the Digesdahl 23130-20 and is the answer not in the manual?

Questions and answers

Related Manuals for Hach Digesdahl 23130-20

Summary of Contents for Hach Digesdahl 23130-20

  • Page 1 客服：400 688 9809 网址：www.mamots.com 电话：0431-85178766...
  • Page 2 客服：400 688 9809 23130-18 ® Digesdahl Digestion Apparatus Models 23130-20, -21 Instrument Manual © Hach Company, 1989-91, 1995-97, 1999. All rights reserved. Printed in the U.S.A. hm/ct 2/97 8 ed 网址：www.mamots.com 电话：0431-85178766 aa/dk Rev. 2, 9/99...
  • Page 3 客服：400 688 9809 TRADEMARKS OF HACH COMPANY AccuGrow ® H 2 OU™ PourRite™ AccuVac ® Hach Logo ® PrepTab™ Hach One ® ProNetic™ AccuVer™ Hach Oval ® Pump Colorimeter™ Add-A-Test™ QuanTab ® AgriTrak™ Hach.com™ AluVer ® HachLink™ Rapid Liquid™ HexaVer ®...

  • Page 4: Certification

    The Digesdahl has been tested and is certified as indicated to the following instrumentation standards. Product Safety Per 73/23/EEC LVD: certified compliant by Hach Company to EN 61010- 1 (IEC1010-1), supporting test records by ETL. Listed by ETL to UL 3101-1 (Listing # H0492805390). Certified by CSA to CSA C22.2 No.
  • Page 5 Règlement sur le matériel brouilleur du Canada. FCC Part 15, Class "A" Limits: Supporting test records by TÜV Product Services, certified compliance by Hach Company. (1) this device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:...

  • Page 6: Table Of Contents

    客服：400 688 9809 TABLE OF CONTENTS CERTIFICATION ........................iii SPECIFICATIONS........................vii SAFETY PRECAUTIONS ....................viii OPERATION SECTION 1 GENERAL DESCRIPTION ................3 1.1 Introduction ......................... 3 1.2 Scope of Instructions......................3 SECTION 2 PREPARATION FOR USE ................5 2.1 Unpacking ........................... 5 2.2 Assembly..........................
  • Page 7 客服：400 688 9809 TABLE OF CONTENTS, continued 4.2.7 Sampling and Storage....................25 4.2.8 Accuracy Check ...................... 25 DIGESTION PROCEDURES GENERAL DIGESDAHL DIGESTION ................29 SAMPLE TYPE AND SIZE....................35 DIGESTION PROCEDURE FOR AQUEOUS LIQUIDS..........39 DIGESTION PROCEDURE FOR OILS................53 DIGESTION PROCEDURE FOR SOLIDS ...............

  • Page 8: Specifications

    SPECIFICATIONS 客服：400 688 9809 Temperature Range: Variable from 100 to 480 ° C (212 to 896 ° F) Temperature Control: Within ± 15 ° C of set point* Power Requirements: 115 and 230 Vac models, 50/60 Hz, 250 W** (use only single phase for 230 V) Aspirator Capacity: 11.5 L/min (3.0 gal/min) at water flow rate of 6.5 L/min (1.7 gal/min).

  • Page 9: Safety Precautions

    SAFETY PRECAUTIONS 客服：400 688 9809 Notice Before attempting to unpack, set up or operate this instrument, please read this entire manual. Pay particular attention to Section 3! Failure to do so could result in serious injury to the operator or damage to the equipment. The digestion procedures in this manual involve the use of strong acid and oxidizer at high temperatures.

  • Page 10: Operation

    客服：400 688 9809 OPERATION DANGER Handling chemical samples, standards, and reagents can be dangerous. Review the necessary Material Safety Data Sheets and become familiar with all safety procedures before handling any chemicals. DANGER La manipulation des échantillons chimiques, étalons et réactifs peut être dangereuse. Lire les fiches de données de sécurité...
  • Page 11 客服：400 688 9809 网址：www.mamots.com 电话：0431-85178766...

  • Page 12: Section 1 General Description

    GENERAL DESCRIPTION 客服：400 688 9809 1.1 Introduction The Hach Digesdahl Digestion Apparatus shown in Figure 1 is designed to digest a wide variety of sample types for subsequent determination of total Kjeldahl nitrogen, several minerals, and nutrients. Sample types include food products, feeds, grains, wastewater sludges, plating baths, plant tissues, fertilizers, beverages, and oils.
  • Page 13 客服：400 688 9809 Figure 1 Digesdahl Digestion Apparatus CAPILLARY FUNNEL VENT TRAP CAPILLARY FUNNEL ADAPTOR VENT TRAP BODY COLLUMN BAFFLE FRACTIONATING COLUMN COLUMN RECEPTACLE SAFETY VERTICAL SHIELD SUPPORT FLASK WEIGHT HEAT SHIELD DIGESTION FLASK TEMPERATURE CONTROL TEMPERATURE INDICATOR POWER SWITCH MODE SWITCH HEATER...

  • Page 14: Section 2 Preparation For Use

    If any items are missing or damaged, please contact the Customer Service Department, Hach Company, Loveland, Colorado (the toll-free number is 800-227-4224). For customers outside the U.S.A., contact the Hach office or authorized distributor serving you. Please do not return the instrument without prior authorization from Hach.

  • Page 15: Assembly

    客服：400 688 9809 2.2 Assembly 2.2.1 Heater Assembly Assemble the heater assembly as shown in Figure 2. Figure 2 Heater Assembly 网址：www.mamots.com 电话：0431-85178766...

  • Page 16: Fractionating Head System

    2. Insert the capillary funnel adapter into the largest opening of the vent trap body. Note: The Hach Fume Scrubber Apparatus can be used in place of the aspirator. Fumes are drawn into a chemical absorber module and absorbed by an activated carbon filter.
  • Page 17 客服：400 688 9809 Figure 3 Fractionating Column and Exhaust Assembly 网址：www.mamots.com 电话：0431-85178766...

  • Page 18: Selecting A Temperature Setting

    客服：400 688 9809 2.3 Selecting a Temperature Setting The particular temperature applicable for the sample to be digested is Note: During a digestion, the given in the appropriate analysis procedure manual. The steps below temperature explain how to set the heater temperature. reading will vary slightly above and 1.
  • Page 19 客服：400 688 9809 网址：www.mamots.com 电话：0431-85178766...

  • Page 20: Section 3 Safety & Environmental Considerations

    • Oils and organic liquids should be considered as solids when determining sample size. • Acid type -- Only use acid specified in Hach step-by-step procedures. • Acid volume -- Never use less than 3 mL. • Always follow the order of steps indicated.

  • Page 21: Using Hydrogen Peroxide

    Digesdahl digestion applications: • Do not mix hydrogen peroxide with any chemical reagents except as specified in the Hach instructions. • Do not add hydrogen peroxide directly to the column on the digestion flask. Always add hydrogen peroxide in a slow and controlled manner;...
  • Page 22 • Do store in the original containers with closures as supplied and keep closed when not in use. (Be sure the containers are vented. Hach hydrogen peroxide bottles are shipped with a special vented cap liner.) • Do wear gloves and safety glasses when handling the material.

  • Page 23: Using Sulfuric Acid

    Cleaning the residue must be done cautiously. Do not use alternative cleaning methods or cleaning agents not authorized or endorsed by Hach Company; they may damage the equipment. While cleaning a spill or leak, please follow the safety measures below: 1.

  • Page 24: Waste Management

    Title 40 Code of Federal Regulations (CFR), parts 260 to 280. Waste must be managed and disposed of in accordance with federal, state and local regulations. Refer to Section VIII of the Hach Material Safety Data Sheet that come with reagents for basic disposal information on Hach Products.

  • Page 25: Considerations De Securite Et D'environnement

    Toujours effectuer les minéralisations derrière un écran de protection (# 20974-00) ou sous une hotte fermée. • Pour une protection respiratoire, utiliser une hotte ou l’épurateur de fumées Hach (réf. n° 23266). • Toujours porter des lunettes de sécurité avec protections latérales. •...

  • Page 26: Utilisation De L'eau Oxygénée

    Digesdahl : (peroxyde • NE PAS mélanger l’eau oxygénée avec d’autres réactifs sauf d’hydrogène) indication précisée dans les procédures d’analyse Hach. sous forme concentrée • NE PAS ajouter d’eau oxygénée directement dans la colonne de présente un...
  • Page 27 • Stocker dans les récipients d’origine avec les bouchons fournis et les maintenir fermés lorsqu’ils ne sont pas utilisés. (S’assurer que les récipients sont ventilés. Les flacons d’eau oxygénée Hach sont livrés avec un joint de bouchon perméable spécial). •...

  • Page 28: Utilisation De L'acide Sulfurique

    客服：400 688 9809 • Laver la peau contaminée rapidement à grande eau. Retirer rapidement les vêtements contaminés et les laver soigneusement avant de les réutiliser. Les laver régulièrement. • Laver les yeux à grande eau s’ils sont contaminés et consulter un médecin immédiatement.

  • Page 29: Nettoyage Des Déversements Et Fuites

    客服：400 688 9809 ou la peau à l’eau pendant 15 minutes. Retirer les vêtements contaminés. Appeler un médecin. L’acide sulfurique sous forme de brouillard ou de vapeur a été classé comme cancérigène possible pour l’homme par l’Agence Internationale de Recherche sur le Cancer (IARC). L’acide sulfurique est un oxydant puissant.

  • Page 30: Section 4 Operation

    SECTION 4 OPERATION 客服：400 688 9809 4.1 Apparatus Preparation See SECTION 3 for more safety information. Prepare to perform the digestion either behind a laboratory safety shield or inside a fume hood. If a fume hood is used, check the fume exhaust system to verify it is working property.

  • Page 31: Appropriate Sample Size

    客服：400 688 9809 A general procedure, incorporating application specific requirements, is provided in this section of the manual. To ensure complete sample digestion, consider the variables described in the following paragraphs. 4.2.1 Appropriate Sample Size For solid or organic liquid samples, less than 0.5 grams of anhydrous material can usually be digested effectively.
  • Page 32 客服：400 688 9809 Table 1 Digestion Guidelines of Specific Sample Types Preheat Sample Vol. of Vol. of Sample Weight Time Special Instructions Type Acid Peroxide (Step 5) Plant tissue 0.25 to 0.5 g 4 mL 4 min. 10 mL Use Nitrogen-free paper to weigh samples.

  • Page 33: Carbonization Period

    客服：400 688 9809 Sulfuric acid (H ) consumption depends on the anhydrous mass of material and the chemical composition of the substance. Use of 4 mL is suitable for many materials, but not all. Therefore, the analyst must pay attention to the amount of residual H for the type of sample digested, and adjust the amount of acid or sample accordingly.

  • Page 34: Containment Of Sample

    客服：400 688 9809 If 50% hydrogen peroxide is not available, 30% peroxide may be used as a last resort with caution. Because of the lesser strength, at least 1.67 times more volume must be used (i.e., 16.7 mL of 30% vs. 10 mL of 50% peroxide).
  • Page 35 A primary standard set, containing one bottle of each of the standards, may be purchased from Hach Company. Table 2 lists some of the properties of the three primary standards. Table 2 Some Properties of Kjeldahl Nitrogen Standards (#22778-00)

  • Page 36: Digestion Procedures

    客服：400 688 9809 DIGESTION PROCEDURES 网址：www.mamots.com 电话：0431-85178766...
  • Page 37 客服：400 688 9809 Danger Review Section 3 for important safety information before performing this digestion procedure. Danger Lire au chapitre 3 les informations importantes pour la sécurité avant d’effectuer cette technique de digestion. 网址：www.mamots.com 电话：0431-85178766...

  • Page 38: General Digesdahl Digestion

    Water Sample Volume = 40 ÷ % solids are visible. Note: Use only Hach Note: If sample foams up digestion flasks. Volumetric into the neck of the flask, flasks with concave bottoms lower temperature to 335 °...
  • Page 39 GENERAL DIGESDAHL DIGESTION, continued 客服：400 688 9809 3-5 minutes Heat 3-5 minutes. Do not proceed if After addition of Take the hot flask off Do not boil sample sulfuric acid is not hydrogen peroxide is the heater and allow the to dryness.
  • Page 40 GENERAL DIGESDAHL DIGESTION, continued 客服：400 688 9809 Use metals or TKN procedure Dilute the digest with Turn the If the sample has Continue the approximately 70 mL of temperature dial to a visible turbidity, filter analysis using one of the heat setting of 204 °...
  • Page 41 GENERAL DIGESDAHL DIGESTION, continued 客服：400 688 9809 Metals Procedure Note: If analyzing aliquots smaller than 0.5 mL, pH adjustment is unnecessary. 1. Pipet the appropriate analysis volume into the appropriate mixing graduate cylinder. See Sample and Analysis Volume Tables following the specific digestion for liquids, solids or oils to determine the analysis volume.
  • Page 42 GENERAL DIGESDAHL DIGESTION, continued 客服：400 688 9809 TKN, Colorimetric Methods Consult the spectrophotometer or colorimeter procedure to complete the TKN analysis. The following is only a guide to use if a procedure is not available. 1. Pipet an appropriate analysis volume into a graduated mixing cylinder. 2.
  • Page 43 客服：400 688 9809 网址：www.mamots.com 电话：0431-85178766...

  • Page 44: Sample Type And Size

    SAMPLE TYPE AND SIZE 客服：400 688 9809 Although the Digesdahl can digest many types of samples, a specific digestion is required for specific sample types. To classify the sample as a liquid, oil or solid, use the following charts. Follow the appropriate procedure indicated for each sample type.
  • Page 45 SAMPLE TYPE AND SIZE, continued 客服：400 688 9809 Chart 2 For Oils 网址：www.mamots.com 电话：0431-85178766...
  • Page 46 SAMPLE TYPE AND SIZE, continued 客服：400 688 9809 Chart 3 For Solids* *High levels of iron may interfere with analysis of some parameters. 网址：www.mamots.com 电话：0431-85178766...
  • Page 47 客服：400 688 9809 Danger Review Section 3 for important safety information before performing this digestion procedure. Danger Lire au chapitre 3 les informations importantes pour la sécurité avant d’effectuer cette technique de digestion. 网址：www.mamots.com 电话：0431-85178766...

  • Page 48: Digestion Procedure For Aqueous Liquids

    Water Sample Volume Note: If sample foams up = 40 ÷ %solids into the neck of the flask, Note: Use only Hach lower temperature to Digesdahl flasks. 335 ° C (635 ° F). Continue Volumetric flasks with heating at a lower...
  • Page 49 DIGESTION PROCEDURE FOR AQUEOUS LIQUIDS, continued 客服：400 688 9809 4:00 Boil 4 more minutes. Do not proceed if After addition of Take the hot flask off Do not boil the sample sulfuric acid is not hydrogen peroxide is the heater and allow the to dryness.
  • Page 50 DIGESTION PROCEDURE FOR AQUEOUS LIQUIDS, continued 客服：400 688 9809 Dilute the digest to If analyzing for Turn the If the sample has approximately 70 mL aluminum, nickel or temperature dial to a visible turbidity, filter or heat setting of 204 ° C with deionized water.
  • Page 51 DIGESTION PROCEDURE FOR AQUEOUS LIQUIDS, continued 客服：400 688 9809 2. Dilute to about 20 mL with deionized water. 3. Add one drop of 2,4 Dinitrophenol Indicator Solution. 4. Add one drop of 8 N Potassium Hydroxide (KOH) Standard Solution, swirling between each addition, until the first flash of yellow appears (pH 3).
  • Page 52 6. Add deionized water to the volume indicated in the colorimetric procedure. 7. Continue with the colorimetric procedure. Sample and Analysis Volume Tables for Aqueous Liquids The values in these tables reflect the Hach Spectrophotometer with the narrowest concentration range. Aluminum, Aluminon (Method 8012) Expected Al...
  • Page 53 DIGESTION PROCEDURE FOR AQUEOUS LIQUIDS, continued 客服：400 688 9809 Cadmium, Dithizone (Method 8017) Expected Cd Sample Analysis Dilute to conc. (µg/L) amount (mL) Volume (mL) 0.05-2.5 40.0 20.0 250 mL 0.2-10 20.0 10.0 250 mL 1-40 10.0 5.00 250 mL 10-400 5.00 1.00...
  • Page 54 DIGESTION PROCEDURE FOR AQUEOUS LIQUIDS, continued 客服：400 688 9809 Cobalt (Method 8078) Expected Co Sample Analysis Dilute to conc. (mg/L) amount (mL) Volume (mL) 0.1-6.0 40.0 20.0 25.0 mL 0.5-25 20.0 10.0 25.0 mL 2.0-100 10.0 5.00 25.0 mL 20-1000 5.00 1.00 25.0 mL...
  • Page 55 DIGESTION PROCEDURE FOR AQUEOUS LIQUIDS, continued 客服：400 688 9809 Iron, 1,10 Phenanthroline (Method 8008) Expected Fe Sample Analysis Dilute to conc. (mg/L) amount (mL) Volume (mL) 0.15-8 40.0 20.0 25.0 mL 0.6-35 20.0 10.0 25.0 mL 2.5-125 10.0 5.00 25.0 mL 25-1250 5.00 1.00...
  • Page 56 DIGESTION PROCEDURE FOR AQUEOUS LIQUIDS, continued 客服：400 688 9809 Lead, Dithizone (Method 8033) Expected Pb Sample Analysis Dilute to conc. (µg/L) amount (mL) Volume (mL) 0.1-5.0 40.0 20.0 250 mL 0.4-20 20.0 10.0 250 mL 1.5-80 10.0 5.00 250 mL 15-800 5.00 1.00...
  • Page 57 DIGESTION PROCEDURE FOR AQUEOUS LIQUIDS, continued 客服：400 688 9809 Nickel, PAN (Method 8150) Expected Ni Sample Analysis Dilute to conc. (mg/L) amount (mL) Volume (mL) 0.05-3 40.0 20.0 25.0 mL 0.2-12 20.0 10.0 25.0 mL 0.8-47 10.0 5.00 25.0 mL 8-470 5.00 1.00...
  • Page 58 DIGESTION PROCEDURE FOR AQUEOUS LIQUIDS, continued 客服：400 688 9809 Phosphorus, Ascorbic Acid (Method 8048) Expected PO Sample Analysis Dilute to amount (mL) Volume (mL) conc. (mg/L) 0.12-6 40.0 20.0 25.0 mL 0.5-23 20.0 10.0 25.0 mL 2-90 10.0 5.00 25.0 mL 20-900 5.00 1.00...
  • Page 59 DIGESTION PROCEDURE FOR AQUEOUS LIQUIDS, continued 客服：400 688 9809 Silver (Method 8120) Expected Ag Sample Analysis Dilute to conc. (mg/L) amount (mL) Volume (mL) 0.08-3.7 40.0 20.0 50.0 mL 0.3-15 20.0 10.0 50.0 mL 1.0-60 10.0 5.00 50.0 mL 12-600 5.00 1.00 50.0 mL...
  • Page 60 客服：400 688 9809 网址：www.mamots.com 电话：0431-85178766...
  • Page 61 客服：400 688 9809 Danger Review Section 3 for important safety information before performing this digestion procedure. Danger Lire au chapitre 3 les informations importantes pour la sécurité avant d’effectuer cette technique de digestion. 网址：www.mamots.com 电话：0431-85178766...

  • Page 62: Digestion Procedure For Oils

    Sample and Analysis reached, turn on the Place the flask on the Note: Use only Hach Volume Tables for Oils water to the aspirator heater and boil 4 Digesdahl digestion flasks.
  • Page 63 DIGESTION PROCEDURE FOR OILS, continued 客服：400 688 9809 After addition of Take the hot flask off Dilute the digest Do not proceed if hydrogen peroxide is the heater and allow the to approximately 70 mL sulfuric acid is not visible Add 10 mL complete, boil off excess flask to air cool.
  • Page 64 DIGESTION PROCEDURE FOR OILS, continued 客服：400 688 9809 If analyzing for Turn the If the sample is Continue the aluminum, nickel or temperature dial to a visibly turbidity, filter or analysis using the heat setting of 204 ° C iron, continue to Step wait until the turbidity appropriate procedure (400 °...
  • Page 65 DIGESTION PROCEDURE FOR OILS, continued 客服：400 688 9809 3. Add one drop of 2,4 Dinitrophenol Indicator Solution. 4. Add one drop of 8 N Potassium Hydroxide (KOH) Standard Solution, swirling between each addition, until the first flash of yellow appears (pH 3).
  • Page 66 6. Add deionized water to the volume indicated in the colorimetric procedure. 7. Continue with the colorimetric procedure. Sample and Analysis Volume Tables for Oils The values in these tables reflect the Hach Spectrophotometer with the narrowest concentration range. Aluminum, Aluminon (Method 8012) Expected Al...
  • Page 67 DIGESTION PROCEDURE FOR OILS, continued 客服：400 688 9809 Cadmium, Dithizone (Method 8017) Expected Cd Sample Analysis conc. (mg/kg) amount (g) Volume (mL) 10-400 0.250 20.0 25-1000 0.200 10.0 65-2600 0.150 5.00 480-20000 0.100 1.00 × ----------------- mg/kg Total Cd × A = µg/l reading from instrument B = g sample amount from table C = mL analysis volume from table...
  • Page 68 DIGESTION PROCEDURE FOR OILS, continued 客服：400 688 9809 Cobalt (Method 8078) Expected Co Sample Analysis conc. (mg/kg) amount (g) Volume (mL) 15-950 0.250 20.0 45-2400 0.200 10.0 120-6200 0.150 5.00 880-46000 0.100 1.00 × 2500 ----------------------- - mg/kg Total Co ×...
  • Page 69 DIGESTION PROCEDURE FOR OILS, continued 客服：400 688 9809 Iron, 1,10 Phenanthroline (Method 8008) Expected Fe Sample Analysis conc. (mg/kg) amount (g) Volume (mL) 25-1400 0.250 20.0 60-3500 0.200 10.0 160-9300 0.150 5.00 1200-70000 0.100 1.00 × 2500 ----------------------- - mg/kg Total Fe ×...
  • Page 70 DIGESTION PROCEDURE FOR OILS, continued 客服：400 688 9809 Lead, Dithizone (Method 8033) Expected Pb Sample Analysis conc. (mg/kg) amount (g) Volume (mL) 15-800 0.250 20.0 38-2000 0.200 10.0 100-5300 0.150 5.00 750-40000 0.100 1.00 × ----------------- mg/kg Total Pb × A = µg/l reading from instrument B = g sample amount from table C = mL analysis volume from table...
  • Page 71 DIGESTION PROCEDURE FOR OILS, continued 客服：400 688 9809 Nickel, PAN (Method 8150) Expected Ni Sample Analysis conc. (mg/kg) amount (g) Volume (mL) 7-470 0.250 20.0 20-1200 0.200 10.0 50-3100 0.150 5.00 350-23000 0.100 1.00 × 2500 ----------------------- - mg/kg Total Ni ×...
  • Page 72 DIGESTION PROCEDURE FOR OILS, continued 客服：400 688 9809 Phosphorus, Ascorbic Acid (Method 8048) Expected PO Sample Analysis amount (g) Volume (mL) conc. (mg/kg) 20-900 0.250 20.0 50-2300 0.200 10.0 130-6200 0.150 5.00 1000-45000 0.100 1.00 × 2500 mg/kg Total PO ----------------------- - ×...
  • Page 73 DIGESTION PROCEDURE FOR OILS, continued 客服：400 688 9809 Silver (Method 8120) Expected Ag Sample Analysis conc. (mg/kg) amount (g) Volume (mL) 12-600 0.250 20.0 30-1500 0.200 10.0 80-4000 0.150 5.00 620-30000 0.100 1.00 × 5000 ----------------------- - mg/kg Total Ag ×...
  • Page 74 客服：400 688 9809 网址：www.mamots.com 电话：0431-85178766...
  • Page 75 客服：400 688 9809 Danger Review Section 3 for important safety information before performing this digestion procedure. Danger Lire au chapitre 3 les informations importantes pour la sécurité avant d’effectuer cette technique de digestion. 网址：www.mamots.com 电话：0431-85178766...

  • Page 76: Digestion Procedure For Solids

    Sample and Analysis reached, turn on the Place the flask on the Note: Use only Hach Volume Tables for water to the aspirator heater and boil 4 Digesdahl digestion flasks. Solids following and make sure there is minutes.
  • Page 77 DIGESTION PROCEDURE FOR SOLIDS, continued 客服：400 688 9809 Do not proceed if After addition of Take the hot flask off Dilute the digest to sulfuric acid is not hydrogen peroxide is the heater and allow the approximately 70 mL visible in the flask. Add complete, boil off excess flask to air cool.
  • Page 78 DIGESTION PROCEDURE FOR SOLIDS, continued 客服：400 688 9809 If analyzing for Turn the temperature If the sample has Continue with the aluminum, nickel or dial to a heat setting of visible turbidity, filter or analysis using the 204 ° C (400 ° F). Add iron, continue to Step wait until the turbidity appropriate procedure...
  • Page 79 DIGESTION PROCEDURE FOR SOLIDS, continued 客服：400 688 9809 2. Dilute to about 20 mL with deionized water. 3. Add one drop of 2,4 Dinitrophenol Indicator Solution. 4. Add one drop of 8 N Potassium Hydroxide (KOH) Standard Solution, swirling between each addition, until the first flash of yellow appears (pH 3).
  • Page 80 6. Add deionized water to the volume indicated in the colorimetric procedure. 7. Continue with the colorimetric procedure. Sample and Analysis Volume Tables for Solids The values in these tables reflect the Hach Spectrophotometer with the narrowest concentration range. Aluminum, Aluminon (Method 8012) Expected Al...
  • Page 81 DIGESTION PROCEDURE FOR SOLIDS, continued 客服：400 688 9809 Cadmium, Dithizone (Method 8017) Expected Cd Sample Analysis conc. (mg/kg) amount (g) Volume (mL) 5-200 0.500 20.0 12-500 0.400 10.0 30-1300 0.300 5.00 240-10000 0.200 1.00 960-40000 0.100 0.50 × ----------------- mg/kg Total Cd ×...
  • Page 82 DIGESTION PROCEDURE FOR SOLIDS, continued 客服：400 688 9809 Cobalt (Method 8078) Expected Co Sample Analysis conc. (mg/kg) amount (g) Volume (mL) 10-450 0.500 20.0 20-1200 0.400 10.0 50-3000 0.300 5.00 500-20000 0.200 1.00 2000-100000 0.100 0.50 × 2500 ----------------------- - mg/kg Total Co ×...
  • Page 83 DIGESTION PROCEDURE FOR SOLIDS, continued 客服：400 688 9809 Iron, 1,10 Phenanthroline (Method 8008) Expected Fe Sample Analysis conc. (mg/kg) amount (g) Volume (mL) 12-700 0.500 20.0 35-1700 0.400 10.0 85-4500 0.300 5.00 650-35000 0.200 1.00 2500-140000 0.100 0.50 × 2500 ----------------------- - mg/kg Total Fe ×...
  • Page 84 DIGESTION PROCEDURE FOR SOLIDS, continued 客服：400 688 9809 Lead, Dithizone (Method 8033) Expected Pb Sample Analysis conc. (mg/kg) amount (g) Volume (mL) 8-400 0.500 20.0 20-1000 0.400 10.0 50-2600 0.300 5.00 400-20000 0.200 1.00 1500-80000 0.100 0.50 × ----------------- mg/kg Total Pb ×...
  • Page 85 DIGESTION PROCEDURE FOR SOLIDS, continued 客服：400 688 9809 Nickel, PAN (Method 8150) Expected Ni Sample Analysis conc. (mg/kg) amount (g) Volume (mL) 4-220 0.500 20.0 10-580 0.400 10.0 25-1500 0.300 5.00 200-11000 0.200 1.00 750-45000 0.100 0.50 × 2500 ----------------------- - mg/kg Total Ni ×...
  • Page 86 DIGESTION PROCEDURE FOR SOLIDS, continued 客服：400 688 9809 Phosphorus, Ascorbic Acid (Method 8048) Expected PO Sample Analysis amount (g) Volume (mL) conc. (mg/kg) 10-450 0.500 20.0 25-1100 0.400 10.0 67-3100 0.300 5.00 500-23000 0.200 1.00 2000-93000 0.100 0.50 × 2500 mg/kg Total PO ----------------------- - ×...
  • Page 87 DIGESTION PROCEDURE FOR SOLIDS, continued 客服：400 688 9809 Silver (Method 8120) Expected Ag Sample Analysis conc. (mg/kg) amount (g) Volume (mL) 6-300 0.500 20.0 15-750 0.400 10.0 40-2000 0.300 300-15000 0.200 1.00 1200-60000 0.100 0.50 × 5000 ----------------------- - mg/kg Total Ag ×...

  • Page 88: Section 5 Maintenance

    客服：400 688 9809 MAINTENANCE Some of the following manual sections contain warning labels and require special attention. Read and follow all warning instructions carefully to avoid personal injury and damage to the instrument. Only qualified personnel should conduct maintenance procedures on this instrument. 网址：www.mamots.com 电话：0431-85178766...
  • Page 89 客服：400 688 9809 网址：www.mamots.com 电话：0431-85178766...

  • Page 90: Fuse Replacement

    SECTION 5 MAINTENANCE 客服：400 688 9809 5.1 Fuse Replacement The fuse holder is located on the back panel within the power cord receptacle. See Figure 2. To replace a fuse, turn off the instrument power and disconnect the power cord from the back panel. Removal of the vertical support is necessary.
  • Page 91 客服：400 688 9809 网址：www.mamots.com 电话：0431-85178766...

  • Page 92: General Information

    客服：400 688 9809 GENERAL INFORMATION At Hach Company, customer service is an important part of every product we make. With that in mind, we have compiled the following information for your convenience. 网址：www.mamots.com 电话：0431-85178766...
  • Page 93 客服：400 688 9809 网址：www.mamots.com 电话：0431-85178766...

  • Page 94: Replacement Parts

    REPLACEMENT PARTS 客服：400 688 9809 REQUIRED REAGENTS Quantity Required Description Per Digestion Unit Cat. No. Hydrogen Peroxide, 50% ........... 10 mL ..500 mL ..21196-49 Sulfuric Acid, ACS, (concentrated, spec. gravity 1.84)......≥ 2.5 mL ....4 kg ...979-09 Water, demineralized ............varies....4 L ...272-56 REQUIRED APPARATUS Dispenser, pour-out, 10 mL............
  • Page 95 REPLACEMENT PARTS, continued 客服：400 688 9809 OPTIONAL APPARATUS (continued) Description Unit Cat. No. Flask, filter, 500 mL..................each... 546-49 Flask, flat-bottom volumetric, 100 mL ............each..23125-42 Fume Scrubber Apparatus, 115 V..............each..23266-00 Fume Scrubber Apparatus, 230 V..............each..23266-02 Oven, laboratory, 120 V.................

  • Page 96: How To Order

    客服：400 688 9809 HOW TO ORDER 网址：www.mamots.com 电话：0431-85178766...

  • Page 97: Repair Service

    客服：400 688 9809 REPAIR SERVICE 网址：www.mamots.com 电话：0431-85178766...

  • Page 98: Warranty

    客服：400 688 9809 WARRANTY 网址：www.mamots.com 电话：0431-85178766...
  • Page 99 客服：400 688 9809 网址：www.mamots.com 电话：0431-85178766...
  • Page 100 客服：400 688 9809 网址：www.mamots.com 电话：0431-85178766...
  • Page 101 客服：400 688 9809 网址：www.mamots.com 电话：0431-85178766...

This manual is also suitable for:

Digesdahl 23130-21

Table of Contents