孔雀绿-磷钼杂多酸分光光度法测定水样中磷的含量  

Determination of phosphorus content in water samples by malachite green-heteropoly molybdophosphoric acid spectrophotometry

作　　者：张莹琪[1] 冯文珊[1] 陈林[1] 

机构地区：[1]太原工业学院,山西太原030008

出　　处：《工业水处理》2011年第12期79-80,92,共3页Industrial Water Treatment

基　　金：山西省高校科技研发项目(20111028)

摘　　要：在非离子（O/W）型微乳液（OP/n—C5H11OW/n—C7H15/H2O）中，建立了孔雀绿-磷钼杂多酸显色体系测定样品中磷的方法。优化的实验条件为：1．70mL 2．0mol／L硫酸，0．80mL 0．14mol／L钼酸铵，0．55mL微乳液，1．10mL1．0％孔雀绿。孔雀绿-磷钼杂多酸形成的缔合物的最大吸收波长为650nm，线性回归方程为y=1．84×10^5x＋0．025 1．25mL溶液中磷质量在0．2—3．5μg范围内符合Lambert—Beer定律。该方法用于测定样品中磷的含量。相对标准偏差1．2％～2．1％，加标回收率在97％-103％。Zhang Yingqi, Feng Wenshan, Chen Lin （ Taiyuan Institute of Technology, Taiyuan 030008, China） Abstract： A method for determining phosphorus in water samples by the malachite green-heteropoly molybdophos- phoric acid system in O/W non-ionic micro-emulsion medium（OP/n-C5H11OH/n-C7H16/H2O） has been established. The optimal experimental conditions are 1.70 mL 2.0 mol/L of H2SO4,0.80 mL 0.14 mol/L ammonium molybdate, 0.55 mL microemulsion,and 1.10 mL 1.0% malachite green. The maximum absorption wavelength of the complex consisting of malachite green and phosphorus-molybdenum heteropoly acid is at 650 nm. The contents of linear regression equation is y=1.84×10^5x ＋ 0.025 1. Lambert-Beer＇s Law is obeyed when the phosphorus mass is in the range of 0.2-3.5 μg, in 25 mL solution. The method is applied to the determination of phosphorus content in sampies, whose RSD is 1.2%-2.1% and the indexed recovery rate is 97%-103%.

关 键 词：微乳液 孔雀绿 钼酸铵 分光光度法 

分 类 号：X832.02[环境科学与工程—环境工程]