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Summary of Contents for Hach 16900
- Page 1 DOC022.53.80708 Digital Titrator, Model 16900 05/2024, Edition 1 User Manual...
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Page 3: Table Of Contents
Table of Contents Section 1 Specifications ..............3 Section 2 General information ............3 2.1 Safety information ..............3 2.1.1 Use of hazard information ........... 4 2.2 Icons used in illustrations ............4 2.3 Intended use ................4 2.4 Product overview ................ 4 2.5 Product components .............. - Page 4 Table of Contents...
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Page 5: Section 1 Specifications
Section 1 Specifications Specifications are subject to change without notice. Digital titrator Specification Details Enclosure Chemical- and impact-resistant acetal plastic Weight 132 g (4.7 oz) Delivery 800 digits/mL or 0.00125 mL/digit Accuracy ± 1% for readings less than 100 digits ±... -
Page 6: Use Of Hazard Information
risks and install appropriate mechanisms to protect processes during a possible equipment malfunction. Please read this entire manual before unpacking, setting up or operating this equipment. Pay attention to all danger and caution statements. Failure to do so could result in serious injury to the operator or damage to the equipment. Make sure that the protection provided by this equipment is not impaired. -
Page 7: Product Components
Figure 1 Product overview 1 Delivery tube—Use a straight delivery 5 Delivery knob—Turn to slowly move the tube for hand-held titration. Use a right- plunger toward the cartridge to push angle (90°) delivery tube when the digital titrant out of the delivery tube. titrator is attached to a laboratory stand. -
Page 8: Section 3 Operation
Chemical exposure hazard. Dispose of chemicals and wastes in accordance with local, regional and national regulations. Refer to the operation steps that follow and the applicable method at https://www.Hach.com/WAH to do a titration procedure. 3.1 Install a titration cartridge 1. Select the correct titration cartridge to use. Refer to the table in the titration procedure (method). -
Page 9: Titrate The Sample
Figure 3 Install a titration cartridge 3.2 Titrate the sample 1. Prepare the sample as follows: a. Add the applicable sample volume to a 125-mL or 250-mL Erlenmeyer flask. Use the smallest possible size of graduated cylinder or pipet to measure the sample volume. - Page 10 The results will not be accurate if the delivery tube tip is not held in the solution. d. Add titrant and swirl the sample until the end point. Record the number of digits shown in the digital counter window. Each digit (1/10 turn of the knob) supplies 0.00125 mL of titrant. For most tests, the solution in the titrant cartridge is made so that digits shown on the digital counter are the same as the concentration of the sample in mg/L.
- Page 11 Figure 4 Attach the digital titrator to a laboratory stand English 9...
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Page 12: Calculate The Concentration Of The Sample
3.3 Calculate the concentration of the sample Digits necessary × Digit multiplier = Sample concentration Where: Digits necessary—The number shown in the digital counter window Digit multiplier—The number from the table in the method (titration procedure), which is based on the sample dilution and titrant strength. 3.4 Calculate the titrant volume used Titrant volume used in mL = Digits necessary ÷... -
Page 13: Section 5 Accuracy Check
Figure 5 Select the hardness procedure Section 5 Accuracy check Use the standard addition method to check the accuracy of the digital titrator and to make sure that the procedure was done correctly. Refer to the Accuracy check section of the procedure for the steps. If the actual number of digits necessary is not within 1% of the expected number of digits during an accuracy check, refer to Troubleshooting... -
Page 14: Section 6 Adapt A Buret Titration
Section 6 Adapt a buret titration Adapt a buret titration method to the digital titrator as follows: 1. Use the equation that follows to calculate the digits necessary to do the buret method. Digits necessary = (N × mL × 800) ÷ N Note: The digital titrator dispenses 1 mL per 800 digits on the counter. -
Page 15: Section 7 Troubleshooting
Buret milliliters = (205 × 8.0) ÷ (800 × 0.4) = 5.13 mL Multiply the 5.13 mL by 4 to adjust for the decrease in the sample size: 5.13 mL × 4 = 20.5 mL If the buret method multiplies the number of milliliters of titrant by a factor to calculate the concentration of the sample, multiply 20.5 by that factor. - Page 16 Figure 6 Troubleshooting 14 English...
- Page 17 Branch Procedure Answer Refer to the interferences given in the titration If interferences are not procedure for the parameter. present or thought to not be present, go to Branch B. If interferences are present, go to Branch C. Titrate deionized water with no standard The chemicals, apparatus, added, then do three standard additions.
- Page 18 Branch Procedure Answer Check the performance of the reagents. Use a If the reagents used were known standard solution to do the test or use a defective, do Branch B again new fresh lot of the reagent. with new reagents. If the reagents are in good condition, go to Branch H.
- Page 19 Branch Procedure Answer Plots C and D are examples of equal Refer to the Interferences increments between standard additions. Refer section of the procedure. Figure 7. Plots C and D show the effect of Apparent interferences can interferences on the standard addition and on be caused by errors in the the substances in the sample.
- Page 20 Table 1 Accuracy check data (continued) Total standard added Digits necessary Total standard Total parameter (mL) added (mg/L) found (mg/L) Figure 7 Standard additions graph 18 English...
- Page 22 (800) 227-4224 (U.S.A. only) Fax +49 (0) 2 11 52 88-210 Tel. +41 22 594 6400 Fax (970) 669-2932 info-de@hach.com Fax +41 22 594 6499 orders@hach.com www.de.hach.com www.hach.com © Hach Company/Hach Lange GmbH, 2024. All rights reserved. Printed in U.S.A. *DOC022.53.80708*...
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