Semnificație și utilizare

4.1 Dilute solutions of peroxides in various organic solvents are often used as catalysts or reaction initiators. Peroxides can also be formed through autoxylation in certain classes of compounds, including ethers, acetals, dienes, and alkyl aromatics, and are a potential safety concern. This test method provides a procedure for determining peroxide or reactive oxygen species levels.

Metoda standard de testare ASTM E299-2017 pentru urme de peroxizi în solvenți organici

Etapa 1: Domeniul de aplicare

1.1 Această metodă de testare 2,3 covers organic solvents containing reactive oxygen species in this range of 5 la 80 micrograms per gram (PPM) or higher. By using a special reaction absorption cell, the test method can be extended to a range of 0 to 5ppm. This test method can be used to determine a variety of peroxide classes with different reactivity, such as hydroperoxides, diacyl peroxides, diaryl peroxides, peresters, and ketone peroxides. Stable ditertiary alkyl peroxides do not react under analytical conditions.

1.2 Solvents that can be successfully analyzed include saturated and aromatic hydrocarbons, alcohols, ethers, ketones and esters. în plus, the test method is suitable for olefin solvents and certain compounds containing alpha, beta and conjugate unsaturation. Solid samples soluble in acetic acid-chloroform solvents can also be analyzed.

1.3 Review the current Safety Data Sheet (SDS) for details on toxicity, first aid measures and safety precautions.

1.4 Valorile exprimate în unități SI vor fi considerate valori standard. Valorile date în paranteze sunt doar pentru referință.

1.5 This standard is not intended to address safety concerns, dacă există, asociat cu utilizarea acestuia. Este responsabilitatea utilizatorilor acestui standard de a stabili practici adecvate de securitate și sănătate și de a determina aplicabilitatea restricțiilor de reglementare înainte de utilizare..

1.6 Acest standard internațional se bazează pe principiile de standardizare recunoscute la nivel internațional stabilite în “Decizia privind principiile pentru elaborarea standardelor internaționale, Orientări și recomandări” issued by the WTO Committee on Technical Barriers to Trade (TBT).