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New Developments in Flow Injection Vapor Generation Atomic Absorption Spectrometry

✍ Scribed by Fang Zhaolun; Tao Guanhong; Xu Shukun; Liu Xuezhu; Wang Jing

Publisher
Elsevier Science
Year
1996
Tongue
English
Weight
144 KB
Volume
53
Category
Article
ISSN
0026-265X

No coin nor oath required. For personal study only.

✦ Synopsis

The combination of flow injection techniques with vapor generation atomic absorption spectrometry (VGAAS) was shown to significantly improve the overall performance of the latter. Recently, new developments in this field have made possible further enhancements in sensitivity and selectivity, including:

(1) selectivity enhancement by optimization of kinetic conditions (2) selectivity enhancement by on-line separation of interferents (3) selectivity enhancement by on-line sample matrix modification (4) FI-HGAAS with sensitivity enhancement by reagent addition (5) sensitivity enhancements by on-line coprecipitation preconcentration (6) sensitivity enhancements by in situ preconcentration of hydrides in a graphite furnace.

These are illustrated by applications in the trace or ultratrace determination of germanium, selenium, arsenic, antimony, bismuth, tin, and lead in environmental samples and Chinese herbal medicine.

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