摘要
提出采用IBM-PC计算机调优的MSM法进行离子浮选分光光度法富集测定水中痕量镉离子,建立富集和测定镉离子浓度的最优化条件为1％SDS溶液5.60mL,0.02％5-Br-PADAP 11.30mL,无水乙醇1.00mL,氨性缓冲液(pH=11.0)22.5mL,N_2的流速0.035L/min。确定镉离子浓度的线性范围为0.00～0.05mg/L,回收率在95％～106％之间,相对标准偏差小于5％,镉离子的检出限为0.35μg/L。结果表明,方法可靠,重现性好,精密度、精确度和回收率均取得满意结果。
This paper describes ion flotation spectrophotometric determination of trace amount of cadmium ion in water modified simplex method (MSM) of multifactor optimization control by means of IBM-PC computer.The optimum condition of determination of cadmium ion can be obtained.An ion flotation spectrophotometric method for determination cadmium ion in water has linearity range 0.00 ~ 0.05mg/L,recovery 95 % ~ 106%,relative standardd deviation less than 5% and detection limit 0.35μg/L.The optimum experiment conditions for ion flotation as follow: 0.02% 5-Br-PADAP 11.30mL,1% SDS 5.60mL,ammoniacal buffer solution 22.5mL,non-aqueous alcohol 1.00mL,nitrogen flow rate 0.035 Lmin,respectively.This method has a good feasibility,reproducibility,precision,accuracy and satisfactory recovery ratio.
出处
《北京工业大学学报》
CAS
CSCD
1992年第4期54-60,共7页
Journal of Beijing University of Technology
关键词
离子浮选
分光光度法
镉
水
测定
ion flotation,spectrophotometry,cadmium ion,computer simplex optimization
