黄原酸酯光度法测定吸附在植物叶片上的铜  

PHOTOMETRIC DETERMINATION OF COPPER(Ⅱ) ADSORBED ON PLANT LEAVES WITH CELLULOSE XANTHATE

作　　者：啜惠民[1] 赵惠芝[1] 

机构地区：[1]河北职业技术师范学院化学系,昌黎066600

出　　处：《理化检验（化学分册）》2001年第11期503-504,共2页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

摘　　要：用滤纸与NaOH和二硫化碳作用形成纤维素黄原酸酯滤纸 ,使其吸附植物叶片处理液中的Cu2 + ,形成稳定的黄色螯合物 ,用光度法测定铜的含量。检出限为 6.4 μg·L- 1,相对标准偏差小于 3% ,Zn2 + 、Fe2 + 、Ca2 + 、Mg2 +The cellulose xanthate is prepared by immersing the filter paper successively in 100g·L -1 NaOH solution and carbon disulfide. The filter paper is then washed with distilled water until it is neutral, and finally dried at 50℃. The copper(Ⅱ) is desorbed from the plant leaves by stripping with acidified water. An aliquot of the sample solution is taken and Cu(Ⅱ) is adsorbed on a piece of the cellulose xanthate on which a stable yellow chelate is formed. The absorbance of this yellow chelate is determined at 400nm with the 721 spectrophotometer. Its detection limit is 6.4μg·L -1 . RSD′s obtained are less than 3%. Zinc (Zn 2+ ), Fe 2+ , Ca 2+ and Mg 2+ do not interfere with the determination.

关 键 词：光度法 黄原酸酯 铜 植物叶片 痕量分析 杀菌剂 药物评价 测定 

分 类 号：TQ455.1[化学工程—农药化工]