伏安极谱法测定皮革中的总铬含量方法研究  

The Determination of Chromium in Leather with Voltammetric Polarography

作　　者：刘丹[1,2] 杨波[1,2] 朱正鑫[1,2] 戴红[1,2] 

机构地区：[1]四川大学制革清洁技术国家工程实验室,四川成都610065 [2]四川大学皮革化学与工程教育部重点实验室,四川成都610065

出　　处：《皮革科学与工程》2013年第3期72-76,共5页Leather Science and Engineering

摘　　要：研究了伏安极谱法测定六价铬的方法,对皮革样品进行干法消解,并用氯酸钾将皮革中的铬全部氧化为六价铬,然后采用伏安极谱法对皮革中的铬含量进行了测定,并且对测定方法进行了评估。实验结果表明：在选定的伏安极谱测定条件下,伏安极谱法检测的结果为：样品中总铬含量为2.096%,回收率在94.20%~109.2%之间,相对标准偏差（n=6）为2.74%,国标法检测的结果为2.117%。伏安极谱法与国标法相比,相对误差为0.996%。说明采用伏安极法测定皮革中的总铬含量方法具有准确、灵敏、误差小,检测限低的优点。The determination of chromium （VI） with vohammetric polarography is researched and the method has been ap- plied in determination of total chromium in leather sample. Chromium Ⅲ in leather is oxidized into chromium VI with potassium chlorate after leather sample digestion and determinated with voltammetrie polarography method. The result is evaluated. The results show that chromium content in leather is 2.096%, recovery is between 94.20%-109.2% , The rela- tive standard deviation （n=6） of vohammetric polarography is 2.74%. The result is 2.117% using national standard. Com- pared voltammetrie polarography with national standard method, the relative error is 0.996%. So the determination of Chromium in leather with voltammetric polarography is sensitive, accurate with low limitation and small errors.

关 键 词：伏安极谱法 皮革 铬含量 

分 类 号：TS57[轻工技术与工程—皮革化学与工程]