ASTM E299 Trace Amounts of Peroxides In Organic Solvents
Saturated and aromatic hydrocarbons, alcohols, ethers, ketones, and esters are among the solvents that can be satisfactorily examined in ASTM E299. The test procedure is also relevant to olefinic acids, as well as some compounds containing α, β, and conjugated unsaturation. Furthermore, solid samples that can be dissolved in water and acetic acid-chloroform solvent can also be investigated.
Scope:
As catalysts or reaction initiators, dilute peroxide solutions in various organic solvents are often utilized in tests. Autoxidation can also produce peroxides in certain types of plants. Ethers, acetals, dienes, and alkyl aromatic compounds are among them.
Procedure:
In the procedures of ASTM E299, samples are dissolved in a mixture of acetic acid and chloroform. The solution is deaerated before adding potassium iodide reagent solution. The mixture is allowed to react in the reaction chamber. For 1 hour in the dark, a comparable amount of iodine is released. The solution’s absorbance is measured, and the amount of active oxygen in the sample is calculated. A de-aerated reaction-absorption cell is throughout this experiment. To increase the precision, absorbance measurements are taken at 410 nm.
Read More :- ASTM E299-08 Test Method for Trace Amounts of Peroxides in Organic Solvents
Video 01: Determination of Peroxide Value
Specimen detail:
The specimen size is not specified for this test method.
Result:
The amount of active oxygen found in the sample and the density values are calculated.
Conclusion:
The test procedures in ASTM E139 can be used to identify various peroxide classes with varying levels of reactivity.
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