A&D MS-70 User Handbook Manual
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A&D MS-70 User Handbook Manual

Moisture analyzer
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International Div., A&D Company, Limited
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Version 2.30M
December 2009
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Summary of Contents for A&D MS-70

  • Page 1 & ’ & ’ Version 2.30M December 2009 International Div., A&D Company, Limited...

  • Page 2: Table Of Contents

    1. Moisture content 2. Method of measurement 3. Accuracy (repeatability) 4. Samples B. Calibration C. Other questions ■ Introduction to moisture analyzers (MS-70/MX-50/MF-50/ML-50) A. Heating method B. Measurement ■ Application of the analyzer A. Measurement samples 1. Measurement methods 2. Measurement report 3.

  • Page 3: Measurement

    ■ Basics A. Measurement 1. Moisture content What is moisture content? Moisture content is usually expressed as the percentage of water mass in a solid, liquid or gas. When the sample is a gas or partially liquid, it can also be expressed as a percentage of water mass versus sample volume.
  • Page 4 ■Basics/A. Measurement/2. Method of measurement sample mass after heated-air drying. Weight loss gradually increases as a sample gets heated and finally reaches a constant value. Depending on its characteristics, samples may thermally decompose and vaporize if the heating temperature gets too high. This suggests that the loss in mass may not be completely water. However, optimal sample sizes, along with optimal heating conditions such as temperature and heating time, can lead results that are comparable to those obtained by methods such as the Karl Fischer method.

  • Page 5: Accuracy (Repeatability)

    ■Basics/A. Measurement/3. Accuracy Question Answer What is the difference between 1. The MS/MX/MF/ML is a heating and drying method analyzer the MS/MX/MF/ML and a Karl that compares weight before and after heating and drying. Fischer type analyzer? Karl Fischer analyzers are electrochemical, with a KF reagent containing iodine being added at a fixed quantity.

  • Page 6: Samples

    4. Samples ■Basics/A. Measurement/4.Samples Question Answer ･2H What is the reagent sodium Sodium tartrate dihydrate (Na O; molecular mass: tartrate dihydrate and when is 230.082) is sodium tartrate (Na ) chemically bonded to it needed? two water molecules (2H O; molecular mass: 36.031). The water separates from the sodium tartrate when heated.
  • Page 7 ■Basics/A. Measurement/4.Samples Question Answer Are there any items that the Do not test the following materials. analyzer cannot test ? 1. Explosive material, flammable material, and material that becomes hazardous when heated. 2. Material that forms a surface membrane when heated because the outer surface dries first.

  • Page 8: Calibration

    Temperature can also be calibrated. Can users calibrate the weight Yes. (Temperature calibration is possible with the MS-70 and and temperature? MX-50 only). The calibration results can be printed out in accordance with GLP, GMP or ISO.

  • Page 9: (Ms-70/Mx-50/Mf-50/Ml-50)

    ■Introduction to Moisture Analyzers (MS-70/MX-50/MF-50/ML-50) A． Heating method Question Answer What are the benefits of the Halogen lamps have a higher heating value per unit of time halogen lamp in the than other heating methods, which can shorten measurement MS/MX/MF/ML? time.

  • Page 10: Measurement

    B. Measurement ■Introduction to moisture analyzers/B. Measurement Question Answer What is the benefit of being Being able to see inside the analyzer allows the user to able to see the inside of the comprehend the measurement conditions and provides analyzer during heating? assurance.
  • Page 11 ■Introduction to moisture analyzers/B. Measurement Question Answer Why may the MS/MX/MF/ML 1. The FD-620 displays a measurement temperature lower have a lower moisture content than the actual temperature above the sample. Therefore, rate and longer measurement the MS/MX/MF/ML heats to a higher temperature and tends time than the FD-620 with the to have longer measurement times and lower content same sample?

  • Page 12: Application Of The Analyzer

    ■ Application of the analyzer A. Measurement samples 1. Measurement methods Question Answer Can soybeans and coffee No. Samples like beans should first be crushed in blender or beans be tested without mill because their surface and internal temperatures can be processing? very different.

  • Page 13: Measurement Report

    2. Measurement report ■Application of the analyzer/A.Measurement samples/2.Report This section compares the measurement results of the MX-50 and a Karl Fischer type analyzer with a plastic sample, which has a comparatively low moisture. 1) Measurement conditions + Sample: Plastic (PET) + Heating temperature: 180 ºC + Number of measurements: 5 + Analyzers: MX-50 heating and drying method moisture analyzer (A&D)

  • Page 14: Typical Measurement Results

    ■Application/A.Measurement samples/3.Typical measurement results 3. Typical measurement results ＊ Data from Moisture_data.html in WinCT-MoistureVer.2.20M 1. Household articles Moisture Content Meas. Measurement Mean Repeat- Temp. Sample Time Remarks Mode Value ability Value (min) (℃) Leaves shredded for testing. Tobacco Standard-MID 10.58 0.339 Strong smell emitted during heating.
  • Page 15 ■Application/A.Measurement samples/3.Typical measurement results 2. Food A (grain, beans, sea foods, seasonings, spices, and flavoring) Moisture Content Meas. Measurement Mean Repeat- Temp. Sample time Remarks Mode Value ability Value (℃) (min) Corn grits Standard-MID 17.5 12.06 0.072 (powder) Corn starch Standard-MID 12.74 0.137...
  • Page 16 ■Application/A.Measurement samples/3.Typical measurement results Moisture Content Meas. Measurement Mean Repeat- Temp. Sample time Remarks Mode Value ability Value (℃) (Min) Sugar crystals Standard-MID 0.162 0.0130 8.02 (powder) Soft brown sugar Standard-MID 0.973 0.0386 3.97 (powder) Seasoned salt Standard-MID 0.086 0.0151 17.56 Salt Standard-MID...
  • Page 17 ■Application/A.Measurement samples/3.Typical measurement results 3. Food B (processed foods, dairy products, snacks and sweets, beverages, and others) Moisture Content Meas. Measurement Mean Repeat- Temp. Sample time Remarks Mode Value ability Value (℃) (Min) Sample was broken into Bread Standard-MID 36.65 0.550 1.50 bits.
  • Page 18 ■Application/A.Measurement samples/3.Typical measurement results Moisture Content Meas. Measurement Mean Repeat- Temp. Sample time Remarks Mode Value ability Value (℃) (Min) Honey Sample was placed on Standard-MID 20.3 17.76 0.282 1.59 (drying temp., 120℃) a glass fiber sheet. Honey Sample was placed on Standard-MID 14.5 19.38...
  • Page 19 ■Application/A.Measurement samples/3.Typical measurement results 4. Chemicals and industrial products Meas Moisture Content Classifi- Measurement Mean Repeat- Temp. Sample Remarks cation Mode time Value ability Value (℃) (Min) Sample was flattened Skin-care cream Chemicals Standard-MID 77.06 0.543 0.70 between a folded glass (paste) fiber sheet.
  • Page 20 ■Application/A.Measurement samples/3.Typical measurement results 5. Plastic, electronic parts and rubber Moisture Content Meas. Classifi- Measurement Mean Repeat- Temp. Sample time Remarks cation Mode Value ability Value (℃) (Min) Karl Fischer method; Temp: 180 ºC; 0.3 g sample; 5 Polyethylene measurements: Plastic terephthalate Standard-HI...

  • Page 21: Data Analysis

    B. Data analysis ■Application/B.Data analysis/1.WinCT-Moisture 1. Windows communication software: WinCT-Moisture WinCT-Moisture enables easy transfer of measurement data via RS-232C from A&D MS/MX/MF/ML heating and drying moisture analyzers to PCs for storage and analysis. WinCT-Moisture (CD-ROM) is included with the MS and MX, but it can also be obtained as Accessory No. AX-MX-42.
  • Page 22 ■Application/B.Data analysis/1.WinCT-Moisture (2) Moisture content measurement sample table Moisuture_data.html The WinCT-Moisture CD-ROM contains 118 examples of moisture content rate data measured with the MX-50. To access this data file, browse to the English folder on the disk and click the file named Moisuture_data.html.

  • Page 23: Example Of Rsfig Display

    2. Examples of RsFig display ■Application/B.Data analysis/2.RsFig RsFig imports CSV data for moisture content rate measurement process and results and displays it as a graph. The horizontal axis represents elapsed time (min.) from start of measurement, while the vertical axis represents moisture content rate (%).
  • Page 24 ■Application/B.Data analysis/2. RsFig *The following are samples of measurements using RsFig. (The data was processed using Excel.) Example 1: Final moisture content rate remains unchanged at different temperatures due to the high heat-resistance of the sample Measurement of such samples can be completed in a short time by heating at the highest possible temperature.
  • Page 25 ■Application/B.Data analysis/2. RsFig Example 2. Moisture content measurement inclines sharply above a certain temperature Such samples should be measured at a temperature where moisture content is stabilized but before rapid changes in the curve occur. If a moisture content curve flattens out and then rises again, materials other than water (lipids, additives, organic matter) may have evaporated.
  • Page 26 ■Application/B.Data analysis/2. RsFig Example 3. A stable heating condition cannot be found at any temperature Samples like this are difficult to measure using heating and drying. The sample may have a high content of volatile oil (fat) or its surface may carbonize easily due to its dark color.

  • Page 27: Automatic Determination Of Heating Temperature By Rstemp

    ■Application/B.Data analysis/2. RsFig 3. Automatic determination of heating temperature by RsTemp The RsTemp software determines the optimum heating temperature for measuring moisture content with the MS/MX/MF/ML. The graph shown above shows an example in which sodium tartrate dihydrate is measured with RsTemp. Horizontal axis represents elapsed time.
  • Page 28 ■Application/B.Data analysis/2. RsFig Heating temperature is judged upon results of measurement performed at different temperatures, evaluating stability of moisture content rate at each temperature (inclination of moisture content rate curve, or primary derivative value Rate (%/min.)). RsTemp is a software designed to determine heating temperature most suitable for the sample, from measured and calculated results.
  • Page 29 ■Application/B.Data analysis/2. RsFig *The following are examples in which the heating temperatures were judged with RsTemp. (Printed format) Example 1: Final moisture content rate remains unchanged at different temperatures due to the high heat resistance of the sample Starch (MX-50, 5 g) The upper and lower graphs display measurement results for starch and cornstarch.
  • Page 30 ■Application/B.Data analysis/2. RsFig Example 2. The moisture content curve inclines sharply above a particular heating temperature Soy Bean Flour (MX-50, 5 g) The upper and lower graphs display measurement results for soy powder and butter peanuts. Rate (%/min.) increases shortly after the start of heating, then decreases, and then increases again.
  • Page 31 ■Application/B.Data analysis/2. RsFig Example 3. No temperature setting produces a heating condition for stable moisture measurement Coffee Beans Flour (MX-50, 5g) This graph shows results measurement on coffee beans. Moisture content rate curve (red) does not stabilize to a horizontal line. The differential curve (green line) increases and decreases after the start of heating, and increases again...

  • Page 32: Maintenance

    ■ Maintenance A. Halogen lamp Question Answer How long do the halogen About 5,000 hours. If you use a halogen lamp for 8 hours a lamps last? day, its lifetime is about 2 years. Can users exchange the Yes, it can be replaced with A&D’s optional accessory halogen lamp? AX-MX-34 for the MS/MX/MF/ML.
  • Page 33 A&D INSTRUMENTS LTD. 3-23-14 Higashi-Ikebukuro, Toshima-ku, Tokyo 170-0013 JAPAN Telephone: [81](3) 5391-6132 Fax: [81](3) 5391 6148 Unit 24/26 Blacklands Way Abington Business Park, http://www.aandd.jp Abington, Oxon OX14 1DY United Kingdom Telephone: [44](1235) 550420 Fax:[44](1235) 550485 A&D ENGINEERING, INC. <German Sales Office> 1756 Automation Parkway, San Jose, CA 95131 U.S.A.

This manual is also suitable for:

Mx-50Mf-50Ml-50

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