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《中国化学快报：英文版》
>DETERMINATION OF ANTIMONY IN WATER SAMPLES BY FLOW-INJECTION HYDRIDE GENERATION ATOMIC ABSORPTION SPECTROMETRY WITH ON-LINE ION-EXCHANGE COLUMN PRECONCENTRATION
DETERMINATION OF ANTIMONY IN WATER SAMPLES BY FLOW-INJECTION HYDRIDE GENERATION ATOMIC ABSORPTION SPECTROMETRY WITH ON-LINE ION-EXCHANGE COLUMN PRECONCENTRATION
On-line ion-exchange separation and preconcentration were combined with flow-injection hydride generation atomic absorption spectrometry （HGAAS） to determine ultra-trace amounts of antimony in water samples. Antimony（Ⅲ） was preconcentrated on a micro-column packed with CPG-8Q chelating ion-exchanger using time-based sample loading and eluted by 4 mol l-1 HCl directly into the hydride generation AAS system. A detection limit （3σ） of 0.0015μg l-1 Sb（Ⅲ） was obtained on the basis of a 20 fold enrichment and with a sampling frequency of 60h-1. The precision was 1.0% r.s.d.（n=11） at the 0.5μg l-1 Sb（Ⅲ） level. Recoveries for the analysis of antimony in tap water, snow water and sea water samples were in the range 97-102%.
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