Determination of the contents of Cr(Ⅲ) and Cr(Ⅵ) in man-made chromium-enriched foodstuffs by graphite furnace atomic absorption spectrometry
The contents of Cr(Ⅲ) and Cr(Ⅵ) in chromium-enriched foodstuffs were determined by graphite furnace atomic absorption spectrometry (GF-AAS), to make an accurate evaluation of the quality, including the nutrition and toxicity. Thenoyltrifluoracetonate (TTA) was used to form volatile complex with Cr(Ⅲ), separated from Cr(Ⅵ) as a vapor in the heated graphite furnace. The effects of sample digestion mode, pH, concentration of TTA, sonication time & temperature, and atomization conditions on the separation of Cr(Ⅲ) and Cr(Ⅵ) were investigated. The contents of both Cr(Ⅲ) and Cr(Ⅵ) in selected chromium-enriched foodstuffs were determined ,and the data indicated that the contents of Cr(Ⅵ) were all below its maximum contaminant level (MCL) available.
Graphite Furnace Atomic Absorption Spectrometry Volatilization of Cr(TTA)3 Chromium-enriched foodstuffs
Yaobing Xiao Wenjie Zheng
Tianjin Enter-Exit Inspection and Quarantine Bureau, Tianjin, P. R. China
国内会议
青岛
英文
361-367
2011-10-19（万方平台首次上网日期，不代表论文的发表时间）