Speciation of chromium(VI) and chromium(III) using pneumatically assisted electrospray mass spectrometry

被引：35

作者：

Gwizdala, AB ^{[1
]}

Johnson, SK ^{[1
]}

Mollah, S ^{[1
]}

Houk, RS ^{[1
]}

机构：

[1] IOWA STATE UNIV,DEPT CHEM,US DOE,AMES LAB,AMES,IA 50011

来源：

JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY | 1997年 / 12卷 / 05期

关键词：

chromium determination; speciation; electrospray; ion spray; mass spectrometry;

D O I：

10.1039/a606413b

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Mass spectra can be obtained from aqueous solutions containing both Cr3+ and Cr2O72- as negative ions under the same spray conditions. An excess of HCl is used so that Cr3+ sprays as an anionic chloro complex. Moderately energetic collision conditions produce CrO3- from Cr-VI and CrOCl2- from Cr-III. Detection limits are 100 and 60 ppb for Cr-III and Cr-VI, respectively. Reasonable calibration curves are provided by plotting the ratio of the analyte signal to that for Cl-37(-).

引用

页码：503 / 506

页数：4

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