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测定发铬对铬中毒的诊断、防治及评价环境污染都有一定意义,但目前有关此等报导较少,本文是将头发在硷性情况下进行有机物灰化,使三价铬氧化成六价铬,再萃取到有机相中,加入二苯碳酰二肼显色,以分光光度法测定。本法最低检出量为0.2微克铬,若头发样重为2克,则最低检出含量为0.1微克/克。用萃取法能使许多阳离子不被提取到有机相中,从而消除干扰物。据有关资料报导,若测定10微克铬将存在300倍Pb~(++)Cu~(++)Hg~(++)Cd~(++)Zn~(++)Ni~(++)Mn~(++)V~(+6)等无干扰,但200倍以上的
Determination of chromium on chromium poisoning diagnosis, prevention and evaluation of environmental pollution have a certain significance, but at present there is less about these reports, this article is the hair in the case of alkaline organic matter ashing, oxidation of trivalent chromium into hexavalent Chromium, and then extracted into the organic phase, adding diphenylcarbazide color, determined by spectrophotometry. The minimum detectable volume for this method is 0.2 μg chromium. If the hair-like weight is 2 g, the minimum detectable level is 0.1 μg / g. With the extraction method can make many cations are not extracted into the organic phase, thus eliminating interference. According to the data reported, if the determination of 10 micrograms of chromium there will be 300 times Pb ~ (++) Cu ~ (++) Hg ~ (++) Cd ~ (++) Zn ~ (++) Ni ~ Mn ~ (++) V ~ (+6), etc. without interference, but more than 200 times