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The use of glyoxal and glyoxylic acid to determine N- and N,N-alkyl-substituted hydrazines by liquid chromatographyстатья
Информация о цитировании статьи получена из
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 4 февраля 2014 г.
- Авторы: Smirnov R.S., Smolenkov A.D., Bolotnik T.A., Shpigun O.A.
- Журнал: Moscow University Chemistry Bulletin
- Том: 68
- Номер: 1
- Год издания: 2013
- Издательство: Allerton Press Inc.
- Местоположение издательства: United States
- Первая страница: 17
- Последняя страница: 22
- DOI: 10.3103/S0027131413010100
- Аннотация: Using chromatography and spectrophotometry for investigation of reaction of 1,1-dimethylhydrazine (UDMH), methylhydrazine (MH) and 2-hydroxyethylhydrazine (HEH) with excess of glyoxal (Gl) and glyoxylic acid (GlA) in aqueous solutions it was shown that corresponding monohydrazone was produced as the single derivatization product. The derivatization reaction is quantitative within 20 min at pH 3.5 and at 25 or 40 °C temperature for Gl and GlA respectively. Electronic absorption spectra of derivatives have maxima in the range of 275–305 nm. The conditions for simultaneous determination of hydrazines in water samples by RP–HPLC with UV-detection with preliminary derivatization were proposed. The derivatives were separated on a Zorbax SB-C18 (150×4.6 mm) column with a mobile phase of 20 mM phosphate buffer solution (pH 3.5) – (2–5)% acetonitrile. The limits of detection were 0.25–0.5 or 0.4–0.7 μg/L for derivative of Gl and GlA respectively.
- Добавил в систему: Шпигун Олег Алексеевич