Analysis of hexavalent chromium in Colla corii asini with on-line sample pretreatment valve-switching ion chromatography.
J Chromatogr A
; 1305: 171-5, 2013 Aug 30.
Article
em En
| MEDLINE
| ID: mdl-23891376
An ion chromatography (IC) system with on-line sample pretreatment using valve-switching technique was developed for the determination of hexavalent chromium (Cr(VI)) in Colla corii asini. Colla corii asini is a complicated sample with organics as main matrix. In this work, a polymer-based reversed-phase column was used as a pretreatment column. Via valve-switching technique, sample solution with target ions were eluted from a collection loop to analytical columns, with matrix eliminated on-line. Under the optimized separation conditions, the method showed good linearity (r=0.9998) in the range of 0.004-1.0mg/L and satisfactory repeatability (RSD<3%, n=6). The limit of detection (LOD) was 1.4µg/L (S/N=3). The average spiked recoveries of Cr(VI) were 93.4-102.0%. The result showed that the on-line sample pretreatment IC system was convenient and practical for the determination of trace Cr(VI) in Colla corii asini samples.
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Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Cromatografia Líquida
/
Cromo
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Medicina Tradicional Chinesa
Tipo de estudo:
Diagnostic_studies
Idioma:
En
Revista:
J Chromatogr A
Ano de publicação:
2013
Tipo de documento:
Article
País de afiliação:
China