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来源：百度知道 编辑：UC知道 时间：2024/05/29 22:03:38
本文研究了巯基棉分离富集Bi-5-Br-PADAP显色体系分光光度法测定水中微量铋的方法。在pH=3.5 乙酸-乙酸钠溶液介质中，并有乳化剂OP存在的条件下， Bi（Ⅲ）与5-Br-PADAP形成稳定的1：2的络合物，其最大吸收波长λmax在590 nm处，表观摩尔吸光系数为6.226×104 L /( mol•cm-1)；0～15 µg/25mL范围内铋遵守朗伯比尔定律。对于影响测定的干扰离子用巯基棉进行分离，方法测定结果令人满意，操作简单方便。实验中对巯基棉分离富集的最佳介质酸度、洗脱液酸度和洗脱液用量进行了探讨。此法具有显色速度快、干扰元素少的特点，应用于水中微量铋的测定，能获得满意的结果。

The luminosity having studied sulfhydryl group cotton separates the beneficiation Bi-5-Br-PADAP coloration system beam split models after the main body of a book determining water trace bismuth method. In pH = 3.5 acetic acid- acetic acid sodium solution medium, Bi (III) forms 1：2's stable complex compounds and under having the condition that the emulsifier there exists in OP, with 5-Br-PADAP , it's maximal sorption wavelength lambdamax is get along in 590 nm , apparent suck mole the modulus is 6.226 X 104 L/ (mols & # only 8226; Cm-1); 0 ~ 15 & micro; The g/25mL range inner bismuth is observed Langbobier law. Use sulfhydryl group cotton to carry out separation to the ion affecting the disturbance determining, method admeasurement result is all that could be desired , operation goes to the lavatory simplely. Acidity, washes the best medium separating beneficiation in the experiment to sulfhydryl group cotton taking off liquid acidity and redressing to take off liquid dosages