Selenium speciation in ginger using capillary electrophoresis online coupled with electrothermal atomic absorption spectrometry

A novel and sensitive selenium speciation in cultivated ginger rhizomes was developed using capillary electrophoresis coupled with electrothermal atomic absorption spectrometry. Influencing parameters were experimentally investigated. Under optimal conditions, SeMet, SeCys 2 , Se IV , and Se VI were...

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Veröffentlicht in:Journal of analytical atomic spectrometry 2014-01, Vol.29 (1), p.1889-1896
Hauptverfasser: Deng, Biyang, Shen, Caiying, Qin, Xiangdong, Liang, Shaojun, Liang, Yuying
Format: Artikel
Sprache:eng
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Zusammenfassung:A novel and sensitive selenium speciation in cultivated ginger rhizomes was developed using capillary electrophoresis coupled with electrothermal atomic absorption spectrometry. Influencing parameters were experimentally investigated. Under optimal conditions, SeMet, SeCys 2 , Se IV , and Se VI were completely separated when using capillary electrophoresis electrothermal atomic absorption spectrometry. Detection limits of SeMet, SeCys 2 , Se IV , and Se VI were 1.7, 2.2, 0.89, and 0.97 ng mL −1 , respectively. The recoveries ranged from 95.6% to 104%. The RSD of peak height was observed to be smaller than 5%. When selenium enrichment was used on ginger, SeMet, Se IV , and Se VI could be detected in the first month; in the second month, the concentration of SeCys 2 , as well as the concentrations of SeMet, Se IV , and Se VI , could be determined. Ginger absorbs SeO 3 2− and SeO 4 2− at different rates; they could be converted into the organic selenium species. A novel interface of capillary electrophoresis coupled with electrothermal atomic absorption spectrometry and selenium speciation in ginger was developed.
ISSN:0267-9477
1364-5544
DOI:10.1039/c4ja00129j