| 用TritonX-100-PAN-S作为络合滴定指示剂测定铜 |
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| 引用本文： | 李敏,连国军. 用TritonX-100-PAN-S作为络合滴定指示剂测定铜[J]. 广东微量元素科学, 2004, 11(2): 56-58 |
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| 作者姓名： | 李敏 连国军 |
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| 作者单位： | 温州医学院检验医学与公共卫生学院,浙江,温州,325000;温州医学院检验医学与公共卫生学院,浙江,温州,325000 |
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| 摘 要： | 研究了用TritonX-100-PAN-S作为络合滴定指示剂测定铜的方法。在pH4.5的乙酸-乙酸钠介质中，采用PAN-S为指示剂，以TritonX-100增敏、增稳，用EDTA为络合剂滴定铜。结果表明，待测溶液在测定终点前和达到终点时对比度为79nm，滴定标准偏差为0.039，共存离子的影响小，指示剂在室温下保存至少稳定6个月。可认为用TritonX-100-PAN-S作金属指示剂，能改善反应条件，提高变色灵敏度，是一种优于PAN的金属指示剂。
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| 关 键 词： | 络合滴定 铜 PAN-S |
| 文章编号： | 1006-446X(2004)02-0056-03 |
| 修稿时间： | 2003-12-20 |
The Effect of TritonX-100-PAN-S as a Complexometric Titration Indicator in Determining Copper |
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| LI Min,LIAN Guo-jun School of Laboratory Medicine and Public Health,Wenzhou Medical College,Wenzhou ,China. The Effect of TritonX-100-PAN-S as a Complexometric Titration Indicator in Determining Copper[J]. Trace Elements Science, 2004, 11(2): 56-58 |
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| Authors: | LI Min LIAN Guo-jun School of Laboratory Medicine Public Health Wenzhou Medical College Wenzhou China |
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| Affiliation: | LI Min,LIAN Guo-jun School of Laboratory Medicine and Public Health,Wenzhou Medical College,Wenzhou 325000,China |
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| Abstract: | To study the effects of TritonX - 100 - PAN - S as a indicator on determining copper, in the aceticacid and sodium acetate solution (pH 4.5), using TritonX - 100 enhance the sensitivity and stability, PAN-Sas indicator, EDTA as complex agent, copper was determined. The results show that the contrast of beforeand arrive at titration point is 79 nm. Standard devariation of titration is 0.039. There's little interference ofother ions, the indicator can be stored six months at least. It concludes the metallochromic indicator TritonX- 100 - PAN - S is better than PAN on determining copper, which can enhance the sensitivity and improvethe reaction conditions. |
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| Keywords: | complexometric titration copper PAN-S |
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