微孔滤膜富集分光光度法测定痕量镉  

Spectrophotometric Determination of Trace Cadmium After Preconcentration by Micro Filter Membranc

作　　者：沈淑君[1] 李术艳[1] 

机构地区：[1]漳州职业技术学院食品与生物工程系,福建漳州363000

出　　处：《吉林师范大学学报（自然科学版）》2016年第1期97-100,共4页Journal of Jilin Normal University:Natural Science Edition

基　　金：福建省教育厅A类科技项目(JA13388);漳州市职业技术学院科研项目(ZZY1308)

摘　　要：研究了Cd（Ⅱ）与硫氰酸钾和罗丹明B形成络合物,经微孔滤膜富集,用二甲亚砜将其溶解,用分光光度法测量其吸光度,建立了一种分光光度法测定痕量Cd（Ⅱ）的新方法.本方法最大吸收波长为580 nm,表观摩尔吸光系数ε580=6.85×105L/mol·cm,检出限为6.77×10^-10g/m L,线性范围为0.001-0.14μg/m L.该法用于实际样品的测定,结果令人满意.Study of the ionic associate that is compounded of Cadmium （ Ⅱ ）-KSCN-Rhodamine. By micro filter membrane, the compound and the membran were dissolved in DMSO,and a new spectrophotometric method was presented for the determination of trace Cadmium（ Ⅱ ） by spectrophotometric determination of absorbance of the organic solution system. Its maximum absorption is 580 nm with molar absorptivity being 6.85 × 10^5L/mol . cm and the detection limit is 6.77× 10^-10g/mL,the linear range is 0. 001 -0.14 μg/mL. The proposed method has been successfully applied to the determination of Cadmium（ U ） in water and food samples,and the satisfied resuits were obtained.

关 键 词：镉 微孔滤膜 光度法 

分 类 号：O657.32[理学—分析化学]