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Разработка газохроматографического метода определения высокотоксичных N-нитрозаминов (N-нитрозодиметиламин, N-нитрозодиэтиламин) в биологических средах (моча)

Разработка газохроматографического метода определения высокотоксичных N-нитрозаминов (N-нитрозодиметиламин, N-нитрозодиэтиламин) в биологических средах (моча)

Abstract

The issues of the elaboration of a method for the determination of N-nitrosamines (N-nitrosodimethylamine, N-nitrosodiethylamine) in urine by means of the method of capillary gas chromatography with the use of a thermionic detector are considered. There were performed investigations on the study of the efficacy of the extraction of N-nitrosamines from the urine by steam distillation and gas chromatographic detection of headspace. With the aim of the maximal recovery of N-nitrosamines from the urine and setting parameters of the extraction two method were used to prepare the bioassay for the analysis the alkalization with potassium hydroxide and the addition of salting out reagent neutral salts of alkali and alkaline earth metals. During the process of performed studies there was found that the greatest degree of extraction of Nnitrosamines from the urine by the method of headspace analysis is achieved if using the salting-out agent in an amount of 16 g of sodium sulfate and for N-nitrosodimethylamine is 99%, for N-nitrosodiethylamine 100%.

Рассмотрены вопросы разработки метода определения N-нитрозаминов (N-нитрозодиметиламин, N-нитрозодиэтиламин) в моче методом газовой капиллярной хроматографии с использованием термоионного детектора. Выполнены исследования по изучению эффективности экстракции N-нитрозоаминов из мочи методом дистилляции с водяным паром и газохроматографическим определением равновесной паровой фазы. С целью максимального извлечения N-нитрозоаминов из мочи и установления параметров экстракции использовали два способа подготовки биопробы к анализу: подщелачивание гидрооксидом калия и добавление высаливающих реагентов нейтральные соли щелочных и щелочноземельных металлов. В процессе проведенных исследований установлено, что наибольшая степень извлечения N-нитрозоаминов из мочи методом анализа равновесной паровой фазы достигается при использовании высаливающего реагента сульфата натрия в количестве 16 г и составляет для N-нитрозодиметиламина 99%, для N-нитрозодиэтиламина 100%.

Keywords

N-НИТРОЗАМИНЫ (N-НИТРОЗОДИМЕТИЛАМИН, N-НИТРОЗОДИЭТИЛАМИН), БИОПРОБА, ПАРАМЕТРЫ ЭКСТРАКЦИИ, ВЫСАЛИВАЮЩИЕ РЕАГЕНТЫ, ГАЗОВАЯ КАПИЛЛЯРНАЯ ХРОМАТОГРАФИЯ, ТЕРМОИОННЫЙ ДЕТЕКТОР, N-NITROSAMINES (N-NITROSODIMETHYLAMINE, NNITROSODIETHYLAMINE)

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
gold