CONTINUOUS DETERMINATION OF DIMETHYLSULFIDE AT PART-PER-TRILLION CONCENTRATIONS IN AIR BY ATMOSPHERIC-PRESSURE CHEMICAL IONIZATION MASS-SPECTROMETRY

被引：18

作者：

KELLY, TJ

KENNY, DV

机构：

[1] Battelle, Columbus, OH 43201-2693

来源：

ATMOSPHERIC ENVIRONMENT PART A-GENERAL TOPICS | 1991年 / 25卷 / 10期

关键词：

DIMETHYLSULFIDE; CONTINUOUS MONITORING; MASS SPECTROMETRY; ATMOSPHERIC CHEMISTRY;

D O I：

10.1016/0960-1686(91)90091-K

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Highly sensitive and specific continuous measurement of dimethylsulfide (DMS) in air has been demonstrated using triple quadrupole mass spectrometry with atmospheric pressure chemical ionization. Detection limits of 2 parts per trillion and 4 parts per trillion by volume in air are achieved for DMS using positive ion detection with benzene charge exchange and hot wire excitation, respectively. Either of these ionization modes provides sensitivity sufficient for continuous direct monitoring of dimethylsulfide in the atmosphere, with time response of approximately 1 s. This capability may be applicable to study the effect of oceanic DMS emissions on global climate. Detection limits in continuous monitoring were also determined for hydrogen sulfide (1 ppbv) and for methyl mercaptan, carbonyl sulfide, and carbon disulfide (almost-equal-to 10 ppbv).

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页码：2155 / 2160

页数：6

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