CAPABILITIES OF SUPPORTED LIQUID MEMBRANES FOR METAL SPECIATION IN NATURAL-WATERS - APPLICATION TO COPPER SPECIATION

被引：89

作者：

PARTHASARATHY, N ^{[1
]}

BUFFLE, J ^{[1
]}

机构：

[1] UNIV GENEVA,DEPT INORGAN ANALYT & APPL CHEM,CH-1211 GENEVA 4,SWITZERLAND

来源：

ANALYTICA CHIMICA ACTA | 1994年 / 284卷 / 03期

关键词：

ATOMIC ABSORPTION SPECTROMETRY; COPPER; METAL IONS; SPECIATION; SUPPORTED LIQUID MEMBRANE; WATERS;

D O I：

10.1016/0003-2670(94)85069-0

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The transport of Cu2+ through a Supported liquid membrane (SLM) consisting of 1,10-didecyldiaza-18-crown-6, a fatty acid and a mixture of toluene and phenylhexane (1+1) under natural water conditions was studied. Long-chain fatty acids having various numbers of carbon atoms C-n (n=10-18) were tested to obtain a reasonably high Cu2+ transport rate. The rate of transport of Cu(II) was found to be fast when lauric acid (n=12) was included in the membrane phase. The transport of Cu2+ by the SLM in the presence of Cu(II) complexants such as Tiron and oxalate was investigated. The results showed that the flux of Cu(II) through the membrane depends specifically on the free metal ions. These results were verified by means of a Cu(II) ion-selective electrode. The SLM was applied to the determination of Cu2+ in fresh waters and the results were compared with those obtained by ultrafiltration.

引用

页码：649 / 659

页数：11

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