钙指示剂分光光度法测定水中的钙
收稿日期: 2001-06-17
网络出版日期: 2010-10-01
基金资助
云南省教委基金项目,编号:229941063
Spectrophotometric determination of calcium in water with Kalces
Received date: 2001-06-17
Online published: 2010-10-01
杨亚玲, 毕莉, 刘谋盛 . 钙指示剂分光光度法测定水中的钙[J]. 工业水处理, 2001 , 21(12) : 34 -35 . DOI: 10.11894/1005-829x.2001.21(12).34
The color reaction of Ca2+ with Kalces,many factors of influence on the sensitivity and stability and the optimium operational conditions have been studied.The experimental results reveal that in the presence of HAc-NaAc buffersolution medium(pH5.2),Ca2+ can react with Kalces to form a 1:1 blue complex.The molar absorptivity is 1.33×104L/(mol⋅cm)at 620nm.Under this wavelength and optimum operational conditions ,when the concentration range of calciumcontent is 0~1.6mg/L,Beer's law is obeyed.On the basis of testing 10 kinds of common coexistent interferingions,this method can be applied to the determination of Ca2+ in 6 kinds of water samples.The recovery ratio is 95.6% to 103%.It is very satisfactory.
Key words: Kalces; spectrophotometric; determination of calcium
[1] 瞿庆洲,张泉泓.钙的光度分析近况[J].鞍山钢铁学院学报,1995,18(1):5~10.
[2] Harju L,Krook T.Determination of equilibrium constants of Ca(Ⅱ)-,Cu(Ⅱ)-,Hg(Ⅱ)-and Pb(Ⅱ)-chelates with DOWEXA-1 Chelating resin using ion selective electrodes[J].Anal.Lett.,1996,29(3):439~450.
[3] 崔海容,徐楚华.ICP-AES同时测定高纯碳酸钡中锶、钙、铁[J].分析科学学报,1996,12(2):151~153.
[4] 张龙军,等.二溴茜素作为钙的络合滴定指示剂研究[J].分析化学,1991,19(6):696~699.
[5] 李志军,张微.水中痕量钙镁的流动注射分析---偶氮氯膦Ⅰ分光光度法[J].分析科学学报,1998,14(2):142~144.
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