浊点萃取-石墨炉原子吸收光谱法对不锈钢餐具溶出铬的形态分析被引量：6

Speciation of Chromium in Steeping Fluid of Stainless Steel Tableware by Graphite Furnace Atomic Absorption Spectrometry after Cloud Point Extraction

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摘要采用浊点萃取-石墨炉原子吸收光谱法分离和测定不锈钢餐具中的溶出铬。利用六价铬和吡咯烷二硫代氨基甲酸铵(APDC)间发生选择性络合被萃取到表面活性剂相中,而三价态的铬离子留在水相中,探讨了影响浊点萃取的主要因素:如pH值、APDC试剂的浓度、Triton X-114的浓度、反应温度和时间。在优化的实验条件下,检出限为0.012μg/L,富集倍数为20倍。 A method was developed for the preconcentration, separation and determination of chromium in the steeping fluid of stainless steel tableware by cloud point extraction - graphite furnace atomic absorption spectrometry. It is based on the fact that the complex formed between Cr（Ⅵ） and ammonium pyrrolidine-dithioearbamate（APDC） was extracted into the surfaetant-rich phase, whereas Cr（ Ⅲ ） remained in the aqueous phase when the temperature was higher than the cloud point extraction. The main factors affecting the cloud point extraction, such as pH, concentrations of APDC and Triton X- 114, reaction temperature and time were studied. Under optimized conditions, the linear range of the calibration curve for Cr（ Ⅵ ） was 0.5 - 10.0 μg/L with a detection limit of 0. 012 μg/L.

作者周赛春江海亮周先波朱锡

机构地区浙江大学宁波理工学院分析测试中心浙江大学宁波理工学院生化分院

出处《分析测试学报》 CAS CSCD 北大核心 2008年第4期405-407,411,共4页 Journal of Instrumental Analysis

基金浙江省自然科学基金资助项目(Y504266) 浙江省分析测试基金资助项目(04060) 宁波市自然基金资助项目(A610058)

关键词浊点萃取分离石墨炉原子吸收光谱法 Cr(Ⅵ) 不锈钢餐具 cloud point extraction separation graphite furnace atomic absorption spectrometry Cr （ Ⅵ ） stainless steel tableware

分类号 O562.3 [理学—原子与分子物理] O614.611 [理学—无机化学]

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