ASTM D Standard Test Method for Coulometric and Volumetric Determination of Moisture in Plastics Using the Karl Fischer Reaction (the Reaction of. ASTM D – 03() standard test method for coulometric and volumetric determination of moisture in plastics using the karl fischer reaction (the reaction of. ASTM D Standard Test Method for Coulometric and Volumetric Determination of Moisture in Plastics Using the Karl Fischer Reaction.
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The methanol traps the water which is titrated to an end point with a Karl Fischer reagent to determine the amount present. Molecular sieve or suitable desiccant must be used in the drying tubes for the nitrogen carrier gas. Jena, September 26, — 24 hours of continuous operation, samples, d869 monitoring and in minimum space: Sampling, Test Specimens, and Test Units 9.
Keep the carrier gas? If the temperature is too low or the retention time too short all of the water might not be driven off.
Water content in percent or parts per million is determined. Last previous edition approved in as D – No comments were found for ASTM D – 03 standard test method for coulometric and volumetric determination of moisture in plastics using the karl fischer reaction the reaction of iodine with water.
If the cell potential shows a negative value, indicating that the anode solution contains excess iodine, add approximately 50 to ? If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below. Take care not to get excess moisture on the outside surface of the capillary. One to three grams. The moisture collected in the solution within the titration cell is determined using the reaction of water with I2.
The permanganate index is an assessment of water quality typically used for freshwater and treated drinking waters. Precision and Bias Heat the boat in the oven for 2 min, and then allow the boat to cool for 2 min prior to the introduction of samples.
A small weighed sample is placed into the Karl Fischer drying oven at a predetermined temperature for a predetermined period of time. Users of this standard are expressly advised that determination of the validity of any aastm patent rights, and the risk of infringement of such rights, are entirely their own responsibility.
Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. This is probably caused by the generation of water due to thermal decomposition or solid phase polymerization of the sample. It is permitted to use aluminum foil as a disposable liner for the sample pan.
Calculation or Interpretation of Results Preparation of Apparatus The physical properties of some plastics are affected by the moisture content.
A number in parentheses indicates the year of last reapproval. It can be more accurate than simple weight loss because in the weight loss method volatiles other than water can be lost which is translated into an artificially high water content. ASTM D – 03 standard test method for coulometric and volumetric determination of moisture in plastics using the karl fischer reaction the reaction of iodine with water 0.
Removal of the previous sample will provide more accurate results. ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard.
ASTM D – MOISTURE CONTENT BY KARL FISCHER
A volumetric burette adds iodinecontaining reagent to the titration cell until no more current is generated. Permission rights to photocopy the standard may also be secured from the ASTM website www. Customer comments No comments were found for ASTM D – 03 standard test method for coulometric and volumetric determination of moisture in plastics using the karl fischer reaction the reaction of iodine with water.
NOTE 4—Another permissible method, which uses a micro syringe, is described in section 4. The temperature is set so that the analysis is completed in a short time period, yet eliminating the generation of water from thermal degradation of the sample.
Sample size shall be adjusted to obtain an accurate moisture measurement. High moisture content causes surface imperfections that is, splay or bubbling or degradation by hydrolysis. It is permissible to use similar hydrates to check instrument performance. It is recommended that molded specimens be cut into smaller parts d68669 to testing recommended maximum size 4 by 4 by 3 mm 9. Current edition approved Sept. Sample containers must be adequately dried and the environment in which sampling is performed must not add additional moisture to the sample.
The solutions must be light amber in color. Determination of the moisture present is made using the reaction of I2 with water. D66869 involves the determination of oxidizability, also known as oxygen O2 demand, by asstm permanganate ISO method The time and temperature values are arrived at by testing a similar material and varying the temperature and bake time independently to determine optimal conditions for removal of all water in the sample.
Spectro Scientific has introduced an upgrade to its FieldLab 58 consisting of a more powerful X-ray fluorescence XRF module and newly designed filter that significantly improve the limits of detection for wear metal elements in oil. It was not widely used because of the objectionable odor of pyridine. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.