| 分光光度法测定水样中铬 |
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| 引用本文： | 张泉泓 翟庆洲. 分光光度法测定水样中铬[J]. 环境保护科学, 1996, 22(4): 40-42 |
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| 作者姓名： | 张泉泓 翟庆洲 |
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| 作者单位： | 鞍山钢铁学院化学系，鞍山建材中专化学系，吉林大学化学系 |
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| 摘 要： | 在ｐＨ４．４ＨＡＣ－ＮａＡｃ缓冲介质及乳化剂ＯＰ存在下，Ｃｒ６＋与二溴羟基苯基荧光酮（ＤＢＨＰＦ）显色反应生成桔红色络合物．该络合物最大吸收位于４８２ｎｍ波长处，表现摩尔吸光系数εｍａｘ＝３．４７×１０４．络合物配位比为Ｃｒ６＋：ＤＢＨＰＦ＝２：３，Ｃｒ６＋在０－１６μｇ／２５ｍＬ范围内遵守比耳定律．方法已用于水样中微量铬的测定，结果满意．
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| 关 键 词： | Cr~（6＋）；二溴羟基苯基荧光酮；乳化剂OP；分光光度法；水样 |
DETERMINATING CHROMIUM IN WATER SAMPLES BY SPECTROPHOTOMETER |
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| Zhang Quan -hong,Jin Gut -shun, Zou Ben-yi. DETERMINATING CHROMIUM IN WATER SAMPLES BY SPECTROPHOTOMETER[J]. Environmental Protection Science, 1996, 22(4): 40-42 |
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| Authors: | Zhang Quan -hong Jin Gut -shun Zou Ben-yi |
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| Abstract: | The colour condition for the complex reaction of chromium (Ⅳ )with dibromohydroxyphenylfluorone in the presence of emulior OP is studied. The absorbance of the complex is measured at 482um against a reagent blank with a molar absorptivity of 3. 47 × 104 L. mol(-1).cm(-1). The molar ratio of chromium(Ⅳ ) to dibromohydrxyphenylfluorone is established as 2: 3.Beer's law is followed in the concentration range of 0-16μg of chromium(Ⅳ)in 25ml of solution.The method developed has been successfully applied to the determination of microamounts of chromium in water samples with satisfactory results. |
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| Keywords: | Chromium (Ⅳ ) Dibromohydroxyphenylfluone Emulsion OP Spectrophotometry Water Sample. |
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