3,3',5,5'-四甲基联苯胺比色测定铬(Ⅵ)的人工标准色列  

ARTIFICIAL COLOR STANDARDS FOR DETERMINATION OF CHROMIUM (Ⅵ) WITH 3,3',5,5',-TETRAMETHYLBENZIDINE

作　　者：赵康[1] 任玉贝[1] 张琦 

机构地区：[1]苏州大学化学化工学院,苏州215006

出　　处：《苏州大学学报（自然科学版）》1997年第4期86-88,共3页Journal of Soochow University(Natural Science Edition)

摘　　要：本文提出了一套人工标准色列用于3,3’,5,5’—四甲基联苯胺(TMB)比色测定铬(Ⅵ),该色列以H_2SO_4为介质,以不同含量的K_2Cr_2O_7、K_4Fe(CN)_6和K_3Fe(CN)_6溶液组成,其颜色与RMB和铬(Ⅵ)的显色产物相近。使用本色列,铬(Ⅵ)测定范围为0.01～0.30mg/L,用本法对电镀废水中的铬(Ⅵ)进行了测定,六次测定的相对标准偏差为3.5％,平均值与TMB测定铬(Ⅵ)的分光光度法一致;加标回收率为90％～100％。Artificial color standards is reported in this paper. It is used for determination of Chromium ( Ⅵ ) with 3, 3', 5, 5' ,-tetramthylbenzidine. A set of color stadards consists of H2SO4, K2Cr2O7, K4Fe(CN)6 and K3Fe(CN)6. The linear range of Chromium (Ⅵ) is 0. 01-0. 30mg/L. The method has been applied to waste water sample with satisfactory results. The recovery of 90-100% and relative standard deviation of 3. 5% were obtained respectively.

关 键 词：标准色列 四甲基联苯胺 测定 分光光度法 

分 类 号：O614.611[理学—无机化学]