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 |
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Hauptverfasser: | , , , , |
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. |
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ISSN: | 0267-9477 1364-5544 |
DOI: | 10.1039/c4ja00129j |