Elimination of Water Interference in Pulsed Glow Discharge Time-of-Flight Mass Spectrometry

A.A. Ganeev, A.R. Gubal, S.V. Potapov, S.E. Pogarev, S.E. Sholupov, K.N. Uskov, I.S. Ivanov

Результат исследований: Научные публикации в периодических изданияхстатья

12 Цитирования (Scopus)

Аннотация

Abstract—The presence of water in the discharge cell is a serious problem in glow discharge mass spectrometry. Even very small quantities of water can make considerable changes in the composition and electrical parameters of the plasma, which lead to a decrease in the signal intensity and the appearance of various cluster components. This results in a very complicat ed mass spectrum and significantly deteriorates the analytical performance of the method. Different approaches to solving the this problem are discussed in the paper. A multiple position interface that allows analyzing 6—10 samples without decapsulation of the discharge cell is presented in this work. It is also shown that the use of a tantalum auxiliary cathode ensures a several-order depression of the interfering components (OH+, О Hj, О Н 3 , 1бО+, because of its getter behavior. The simultaneous application of all proposed approaches ensures solving the problem of interferences in the combined hollow cathode with pulsed glow discharge to the g
Язык оригиналаанглийский
Страницы (с-по)1205-1211
ЖурналJournal of Analytical Chemistry
Том68
Номер выпуска14
DOI
СостояниеОпубликовано - 2013

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