METHOD OF QUANTITATIVE DETERMINATION OF N-PHENYLMALEINIMIDE Russian patent published in 2001 - IPC

Abstract RU 2164678 C2

FIELD: analytical chemistry. SUBSTANCE: method involves hydrolysis of substance sample that is carried out in concentrated acetic acid. Obtained solution is treated with a mixture of concentrated sulfuric acid and nitric acid taken in the volume ratio 1:1 at 20-25 C for 60-65 min followed by treatment with sodium hydroxide an aqueous solution (concentration is 20-25%) and optical density of obtained solution is measured at wavelength 400 nm. EFFECT: increased selectivity of assay, simplified procedure, elimination of possible losses, broadened region of using. 4 tbl

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RU 2 164 678 C2

Authors

Ishkov A.V.

Isaev R.N.

Shechkov G.T.

Dates

2001-03-27—Published

1999-03-26—Filed