正交试验设计法研究二安替比林-(2-羟基)-苯基甲烷试剂与铬(Ⅵ)的显色反应  

Study on Color Reaction of Chromium and Diantipyryl-(2-hydroxide)-penyl-methand by Orthogonal Experimental Design

作　　者：蒙丹军[1] 黄梅兰[1] 林会松[1] 

机构地区：[1]广西职业技术学院,广西南宁530227

出　　处：《广西化工》2001年第4期42-44,共3页Guangxi Chemical Industry

摘　　要：以正交试验设计法研究并得到了二安替比林 - (2 -羟基 ) -苯基甲烷试剂吸光光度法测定微量铬的最佳显色条件 ,其最大吸收波长为 480 nm。 Cr( )在 0 .10～ 10μg· 2 5 m L- 1 范围内呈良好线性关系 ,线性回归方程为A=0 .0 5 83C+0 .0 478,线性相关系数为 0 .9971,摩尔吸光系数ε=1.37× 10 5(L· mo L- 1 · cm- 1 )。灵敏度比文献报道有较大提高。方法应用于水样中铬 ( )的测定 。By orthogonal experimental design, the best color conditions were obtained to determine trace Cr using diantipyryl (2 hydroxide) penyl methand spectrophometric method. The conditions were: H 3PO 4(1+1) 1.00 mol, 0.4 mol·L -1 Mn(Ⅱ) 2.00 mL, 1g·L -1 SD 3.00 mL, 10 g·L -1 DA0HM 1.00 mL, and 99℃ water bathing for 18 min. The maximum absorption wavelength was at 480 nm. Chromium appeared to have good linear in the range of 0.1~10μg·25mL -1 . The linear regression equation was A=0.583C(μg·25 mL -1 )+0.0478, the linear correlation factor was 0.9971 and the molar absorptivity was 1.37×10 5 L·mol -1 ·cm -1 . The method has been applied to determine Cr in water sample with high sensitivity and satisfactory results.

关 键 词：正交试验设计 二安替比林-(2-羟基)-苯基甲烷(DA0HM) 铬离子(Ⅵ) 显色反应 分光光度法 

分 类 号：O657.32[理学—分析化学] O614.611[理学—化学]