原子吸收法测定污泥蚯蚓中的镉、铜、铬、锌、铅  

DETERMINATION OF CADMIUM,COPPER,CHROMIUM,ZINC AND LEAD IN THE SLUDGE EARTHWORM BY ATOMIC ABSORPTION SPECTROMETRY

作　　者：伍曼娇 吴湘江[2] 罗能 刘狄[2] 

机构地区：[1]湖南省湘潭市环境保护科研所,湘潭411104 [2]湖南科技大学化学化工学院,湘潭411201 [3]株洲市十一中,株州412000

出　　处：《化学分析计量》2008年第1期55-56,共2页Chemical Analysis And Meterage

基　　金：湖南省教育厅科学研究项目资助课题(06C299)

摘　　要：研究用原子吸收法测定蚯蚓中的镉、铜、铬、锌、铅。将制备成粉状的蚯蚓用硝酸-高氯酸消解,在仪器工作条件下,金属离子含量与吸光度呈良好的线性关系。测定结果的相对标准偏差为1.3%～3.5%(n=7),加标回收率为93%～107%。测定镉、铜、铬、锌、铅离子的线性范围、线性相关系数、检出限依次为0～0.9mg/L,r=0.9984,0.07mg/L;0～10mg/L,r=0.9989,0.05mg/L;0～5mg/L,r=0.9991,0.13mg/L;0～0.7mg/L,r=0.9997,0.02mg/L;0～7.5mg/L,r=0.9994,0.3mg/L。The method for determination of cadmium, copper, chromium, zinc and lead in earthworm by atomic absorptiom spectrometry was researched. The sample of prepared powder of earthworm was digested with nitric acid - perchloric acid. There was a good linearity between concentration of metallic ion and the absorption under the optimised conditions. The relative standard deviation were 1.3% -3.5% （n = 7 ） with recoveries of 93% - 107%. The linear ranges, linear correlation coefficients and the detection limits were 0- 0.9 mg/L, r = 0. 9984, 0.07 mg/L for Cd; 0- 10 mg/L, r = 0.998 9, 0.05 mg/L for Cu; 0- 5 mg/L, r = 0.999 1, 0.13 mg/L for Cr; 0-0.7 mg/L, r =0.9997, 0.02 mg/L for Zn; 0-7.5 mg/L, r=0.9994, 0.3 mg/L for Pb.

关 键 词：火焰原子吸收法 蚯蚓 镉 铜 铬 锌 铅 

分 类 号：O614.242[理学—无机化学]