Determination of Cadmium, Zinc, Nickel and Cobalt in Tobacco by Reversed-Phase High-Performance Liquid Chromatography with 2-(8-Quinolylazo)-4,5-diphenylimidazole as a Chelating Reagent
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- ZHANG Chengjie
- Department of Applied Chemistry and Biotechnology, University of Fukui
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- MIURA Jun'ichiro
- Department of Applied Chemistry and Biotechnology, University of Fukui
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- NAGAOSA Yukio
- Department of Applied Chemistry and Biotechnology, University of Fukui
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説明
A sensitive and selective method has been developed for the simultaneous determination of cadmium, zinc, nickel and cobalt. The method is based on the chelation of metal ions with 2-(8-quinolylazo)-4,5-diphenylimidazole (QAI) and the subsequent reversed-phase (RP) high-performance liquid chromatographic separation and spectrophotometric detection of the metal chelates. The chelates were separated on an RP column with acetonitrile-water containing ethylenediamine tetraacetic acid and sodium acetate (pH 7.5). Though Zn(II) and Cd(II) chelates with azo compounds were generally labile in the RP column, these chelates with QAI were successfully detected. When analyses were carried out at 575 nm and at 0.001 absorbance unit full scale, the peak height calibration curves were linear up to 2.0 ng for Cd(II), 2.4 ng for Zn(II), 0.14 ng for Ni(II) and 0.72 ng for Co(II) in 100-µL injections, respectively; the detection limits (3 σ, three times of the standard deviation for the blank signal) for Cd(II), Zn(II), Ni(II) and Co(II) were 4.8, 24, 2.4 and 7.2 pg in 100 µL of injected solution, respectively. The proposed method was successfully applied to the analysis of tobacco without any preliminary concentration or separation.
収録刊行物
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- Analytical Sciences
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Analytical Sciences 21 (9), 1105-1110, 2005
社団法人 日本分析化学会
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詳細情報 詳細情報について
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- CRID
- 1390282679233927424
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- NII論文ID
- 130004826479
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- NII書誌ID
- AA10500785
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- COI
- 1:CAS:528:DC%2BD2MXhtlGnu7bN
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- ISSN
- 13482246
- 09106340
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- NDL書誌ID
- 7693908
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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