Пигменты. Общие методы испытаний. Часть 19.Метод определения содержания водорастворимых нитратов ( метод салициловой кислоты)
Название (англ.):
General methods of test for pigments; part 19: determination of water-soluble nitrates (Salicylic acid method)
Описание (англ.):
This document specifies a spectrophotometric method. The principle of the method consists in that the nitrate present in the extract of the sample is used to nitrate salicylic acid in sulphuric acid medium. The nitro-compound formed is of an intense yellow colour in alkaline solution and the colour is measured spectrophotometrically at a wavelength of 410 nm. ISO 787/13 specifies amethod using Nessler's reagent. The two methods may not necessarily give the same result; work is being carried out to compare the two methods.
Дата введения:
01.05.74
Код КГС:
Л19
Код ОКСТУ:
2364;2309
Код ОКС(МКС):
87.060.10
Код ОКП:
2364;2309
Нормативные ссылки:
DIN ISO 787-19-1984, EQV*ELOT 245-1979, EQV*EN ISO 787-19-1995, EQV*DIN EN ISO 787-19-1995, EQV
Ключевые слова:
CHEMICAL ANALYSIS CHEMICAL ANALYSIS AND TESTING DETERMINATION OF CONTENT HYDROLYSABLE MATTER DETERMINATION NITRATES PAINTS PIGMENTS SALICYLIC ACID SPECTROPHOTOMETRY TESTING TESTING METHODS TESTS HYDROLYSABLE MATTER DETERMINATIO CHEMICAL ANALYSIS AND TESTIN ACETYLSALICYLIC ACID