Spectrophotometric Determination of Trace Chromium in Food Samples

摘要：

A novel spectrophotometric method for the determination of trace amount of Chromium (Ⅵ) by Trihydroxyl phenylfluorone (THPF) in the microemulsion medium has been developed. All the variables were studied in order to optimize the reaction conditions. At pH=5.82, Cr(Ⅵ) reacts with THPF to form a 1:2 complex, which has a maximum absorption at 560 nm with a molar absorptivity of 8.99×104 L/mol/cm. Beers law is obeyed over the range of 0～0.7 μg/mL of Cr(Ⅵ). The method is highly sensitive and has been applied in determination of Cr (Ⅵ) in food samples with satisfactory results. The relative standard deviation is less than 1.1％ and the recovery is 96.7～106％.

关键词： Microemulsion medium Chromium Spectrophotometry Tri-hydrozyl phenylfluorone(THPF)

作者: Dan Wu Shuyuan Liu Yan Li Peihua Zhu Dong Wei Qin Wei

作者单位: College of Chemistry and Chemical Engineering University of Jinan Jinan,China

会议类型: 国际会议

会议名称: The 3rd International Conference on Bioinformatics and Biomedical Engineering(iCBBE 2009)(第三届生物信息与生物医学工程国际会议)

会议地点: 北京

会议语种:英文

页码: 1-4

在线出版日期: 2009-06-11（万方平台首次上网日期，不代表论文的发表时间）