固相萃取柱脱色测定染色皮革中的六价铬  

Determination of Hexavalent Chromium Content in Dyed Leather by Decoloration with Solid Phase Extraction

作　　者：牛增元[1] 叶曦雯[1] 王英杰[1] 王岩[1] 矫丽珍[1] 王境堂[1] 

机构地区：[1]山东出入境检验检疫局,山东青岛266002

出　　处：《中国皮革》2006年第11期35-36,37,38,共4页China Leather

摘　　要：在不改变皮革样品中六价铬提取方法的前提下，用经化学修饰剂预处理的石墨化碳黑固相萃取柱，对染色皮革的提取液进行脱色，将各种颜色的提取液净化为澄清无色的溶液，同时克服石墨化碳黑萃取柱对六价铬的吸附问题。解决了有色皮革中六价铬含量的测定难题。从0．5mg／kg到10mg／kg之间4个不同浓度水平的添加回收试验表明：方法的回收率在92．31％～100．33％之间，相对标准偏差〈3％，方法的检出限（LOD）D0．15mg／kgCr（Ⅵ）。A commercial ENVI - carb solid phase extraction cartridge was applied to decolour the leather extracts in order to eliminate all the colored substances that may interfere in the spectrophotometric detection of chromium （ Ⅵ ）. There was almost no absorption of chromium （ Ⅵ ） on the solid phase extraction cartridges. The accuracy of the proposed method was tested by recovery tests in which the recovery rate was 92.31% -100.33 % and the relative standard deviations （RSDs） were less than 3 % （ 〈3% ）. The limitation of determination （LOD） of this method was 0.15mg/kg which was lower than those achieved with the existing standard methods.

关 键 词：皮革 六价铬 固相萃取(SPE) 石墨化碳黑 脱色 

分 类 号：TS57[轻工技术与工程—皮革化学与工程]