DBC-偶氮氯膦分光光度法测定水样中铋  

Spectrophotometric determination of bismuth in water sample with DBC-chlorophosphonazo

作　　者：王巍[1] 江天肃[1] 胡伟华[1] 邵晶[1] 母秀峰[1] 张则雪[1] 张晓霞[1] 翟庆洲[1] 

机构地区：[1]长春理工大学西校区纳米技术研究中心,吉林长春130022

出　　处：《冶金分析》2005年第3期80-81,共2页Metallurgical Analysis

摘　　要：在0.36 mol/L硝酸介质中,铋(Ⅲ)与DBC-偶氮氯膦形成1∶2的蓝色络合物,最大吸收波长为638 nm,表观摩尔吸光系数为4.66×104,铋(Ⅲ)在0～1.2 μg/mL范围内遵守比尔定律.本法用于水样品中铋的测定,结果令人满意.In the medium of 0.36 mol/L nitric acid, bismuth (II) can form a blue complex with DBC-chlorophosphonazo. The maximum absorption wavelength is at 638 nm and the apparent molar absorptivity is ε638 = 4.66 × 104 L · mol-1 · cm-1. The molar ratio of bismuth to reagent in the complex is 1:2. Beer's law is obeyed in the range of 0-30 μg/25 mL for bismuth. The method has been used for the determination of bismuth in water samples with satisfactory results.

关 键 词：铋 吸光光度法 DBC偶氮氯膦 水 

分 类 号：O657.3[理学—分析化学] O661.1[理学—化学]