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Interference of lithium in measuring magnesium by complexometry: Discussions of the mechanism
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نویسنده
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gao j. ,guo y. ,wang s. ,deng t. ,chen y.-w. ,belzile n.
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منبع
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journal of chemistry - 2013 - دوره : 2013 - شماره : 0
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چکیده
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There is usually a large concentration of magnesium in the brine of salt lakes and as a consequence it is difficult to measure mg2+ accurately with the complexometric titration by ethylenediaminetetraacetic acid disodium salt (edta) because of the large levels of li+ also coexisting in brine samples. in this study,a relationship between the relative error related to the number of drops of the indicator and the nmr spectra of anhydrous ethanol and n-butanol,with or without licl,was analyzed and compared. it was then possible to suggest a mechanism to explain the interference of li+ when measuring mg2+ and to control the interference in the alcohol mixture because li+ can then complex with the alcohols and mainly form a complex with n-butanol. © 2013 jie gao et al.
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آدرس
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tianjin key laboratory of marine resources and chemistry,college of marine science and engineering,tianjin university of science and technology, China, tianjin key laboratory of marine resources and chemistry,college of marine science and engineering,tianjin university of science and technology, China, tianjin key laboratory of marine resources and chemistry,college of marine science and engineering,tianjin university of science and technology, China, tianjin key laboratory of marine resources and chemistry,college of marine science and engineering,tianjin university of science and technology, China, department of chemistry and biochemistry,laurentian university,sudbury, Canada, department of chemistry and biochemistry,laurentian university,sudbury, Canada
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Authors
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