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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To request a quote for this test or others Click Here. Calibration and Standardization NOTE 4—Another permissible method, which uses a micro aastm, is described in section 4. The moisture collected in the solution within the titration cell is determined using the reaction of water with I2.
Most normal plant or lab operating conditions are adequate for sampling.
To achieve this, the recommended Low moisture with high temperature causes polymerization. Move the sample boat into the oven and begin analysis. Jena, September 26, — 24 hours of continuous operation, samples, without monitoring and in minimum space: Heat the boat in the atm for 2 min, and then allow the boat to cool for 2 min prior to the introduction of samples. Be the first to comment! Water content in percent or parts per million is determined.
The directive relates to the quality of water intended for human consumption, ensuring it is safe and clean. The volume of reagent that is added during the titration is measured and used to calculate the amount of moisture in the sample.
L of neutralization solution or check solution. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. Also, hygroscopic materials like nylon absorb moisture and knowledge of the water content can be important in understanding performance. It involves the determination of oxidizability, also known as oxygen O2 demand, by potassium permanganate ISO method This apparatus has the capability to generate or deliver iodine to react stoiciometrically with the moisture present in the titration cell.
Moisture Content by Karl Fischer. This is probably caused by the generation of water due to thermal atm or solid phase polymerization of the sample.
Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility. This is how compEAct works — a sulfur and nitrogen analyzer from Analytik Jena developed for the petrochemical industry.
NOTE 3—The condition of both anode and cathode solutions are determined by the appearance of the?
Moisture Content by Karl Fischer ASTM D
Molecular sieve or suitable desiccant must be used in the drying tubes for the nitrogen carrier gas. High moisture content causes surface imperfections that is, splay or bubbling or degradation by hydrolysis.
Current edition approved Sept. NOTE 2—Hydranal or similar anode and cathode solutions are recommended. High moisture content causes surface imperfections that is, splay or bubbling or degradation by hydrolysis.
Two methods of checking the instrument are listed here, a micro-capillary method and a sodium citrate method. Hygroscopic resin samples shall be protected from the atmosphere. As solutions age, viscosity will increase and solution color will turn dark.
If and when e6869 data are obtained, a precision statement will be added at a subsequent revision.
It was not widely used because of the objectionable odor of pyridine. Keep the carrier gas?
What is permanganate index? These reagents do not contain pyridine, are d66869 toxic, and have no offensive odor. Their electrode detects the current generated during the titration. 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.
Moisture will affect the processability of some plastics. Halogenated alcohols especially tri? 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.
Volumetric instruments measure the volume of solution containing I2 that is required to keep the current constant. Sample containers must be adequately dried and the environment in which sampling is performed must not add additional moisture to the sample. Record the sample weight. Due astj copyright restrictions, we are not able to provide copies of standards. Knowledge of the moisture content can be important since some polymers degrade when molded wet resulting in reduced properties.
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.