摘要
PH=9.20的Na2B4O7-NAOH缓冲溶液中，十二烷基苯磺酸钠和三乙醉胺存在下，Cd(Ⅱ)和铬黑T瓜形成配位比为1:1的紫红色配合物，基于该显色瓜的最适条件测定镉的胶束增溶分光兴度法，在最大波长560mm处表观摩乐尔系数，e=6.68*106L.cm.cn-1,镉浓度在0～8.0pg/ml范围内服从比耳定律，回归方程A=0.169+5.0*10-3Ccd(pg/ml),r=0.9996,检出限为1.0*10-12g/ml。本法用于小样中镉的测定，结果满意。
In pH 9.20 Na2B4O7—Na OH buffer medium,and in the presence of dodecylbenzene sulfonic sojium and triethanolamine,Cd (Ⅱ) reaction with eriochrome black T to form a redviolet complex which has component ratio of 1:1.Amicelle solbilization spectrophotometry for determination of cadmium has been developed based on the optimum conditions of the color-reaction.The apparent molar absorptivity is 6.68×106 L·mol-1 · cm-1 at λmax =560nm.Beer抯 law is obeyed in the range of 0~8.0μg/ml.the linear regression equation A=0.169+5.0×10-3 Ccd (μg/ml),r=0.9996,the detection limit is 1.0 × 10-12 g/ml.The method has been used for the determination of Cadmium in water samples with the satisfactory result.
出处
《漳州师范学院学报（自然科学版）》
2002年第1期62-65,共4页
Journal of ZhangZhou Teachers College（Natural Science)
关键词
铬黑T
胶束增溶光度法
痕量
镉
十二烷基苯磺酸钠
增敏剂
三乙醇胺
增稳剂
micelle solubilization spectrophotometry,cadmium,eriochrome black T, dodecylbenzene sulfonic sodium,triethanolamine.
