氮气浮选测定化妆品中的铅  

Determination of Pb in Cosmetics by Nitrogen Flotation

作　　者：胡蓉 商少明 濮鑫 方婷 

机构地区：[1]江南大学化学与材料工程学院

出　　处：《光谱实验室》2009年第2期221-225,共5页Chinese Journal of Spectroscopy Laboratory

摘　　要：Pb(Ⅱ)与I-、RB在酸性条件下能形成三元缔合物,该缔合物在有机相中溶解度大于在水中溶解度,通过附着在氮气气泡上而被浮选带入有机相,从而达到分离富集的效果。运用本法测量化妆品中痕量铅,回收率为96.3%—104.4%,RSD<3%,平行性良好,精密度、准确度较高。A nitrogen flotation spectrophotometry for determination of trace Pb in cosmetics with three-component system of Pb（Ⅱ）-I--RB is developed.This three-component whose solubility in organic phase is larger than in water phase can be carried into the organic phase by nitrogen bubble so that it can be separated and enriched. The practical determination results of trace Pb in cosmetics is satisfactory with the recovery of 96.3%—104.4% and RSD of 〈3%.

关 键 词：化妆品 铅 浮选 三元缔合物 

分 类 号：O657.32[理学—分析化学]