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A convenient and sensitive spectrometric system based on a liquid core optical fiber and a charge coupled device was constructed for the determination of chromium(VI) in river water.Diphenylcarbazide was added to Cr(VI) solution to form colored complex in the medium of perchloric acid.With a 35 cm long Teflon optical fiber,the limit of detection(LOD) was 0.4 μg·L~(-1),ten times lower than that of Chinese National Standard Procedure(GB7467-87).The method was applied to determine Cr(VI) in river water without... 相似文献
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随着现代工业的发展,铬被广泛地应用于冶金、制革、印染,电镀、纺织等行业,并随这些行业的废水排放到水体中,成为水体污染的主要原因之一.铬在水体中主要以Cr(Ⅲ)和Cr(Ⅵ)的形式存在,其价态不同,毒性、生物效应也不同.Cr(Ⅲ)为人体所必须,参与了机体糖、脂肪代谢。其缺乏会引起糖尿病、动脉硬化等疾病;而Cr(Ⅵ)则具抑制蛋白质合成、引起细胞突变甚至癌变等危害.因此,Cr(Ⅵ)的含量是评价水质优劣的一个重要指标,是必须监测的环境污染物之一.建立一种简便、快速、自动的方法检测水体中Cr(Ⅵ)对水环境监测具有现实意义. 相似文献
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