Determination of cadmium, lead and thallium in highly saline hemodialysis solutions by potentiometric stripping analysis (PSA)

被引：23

作者：

do Nascimento, PC ^{[1
]}

Bohrer, D ^{[1
]}

de Carvalho, LM ^{[1
]}

Caon, CE ^{[1
]}

Pilau, E ^{[1
]}

Vendrame, ZB ^{[1
]}

Stefanello, R ^{[1
]}

机构：

[1] Univ Fed Santa Maria, Dept Quim, BR-97111970 Santa Maria, RS, Brazil

来源：

TALANTA | 2005年 / 65卷 / 04期

关键词：

potentiometric stripping analysis; Mercury film electrode; Hg(II) oxidant solution;

D O I：

10.1016/j.talanta.2004.08.026

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Potentiometric stripping analysis (PSA) was investigated to assay simultaneously cadmium, lead and thallium present as contaminants in highly saline solutions used in hemodialysis. The saline matrices were sodium, potassium, magnesium and calcium chlorides, sodium acetate, odium bicarbonate and glucose, which constitute concentrates for hemodialysis. A 1000 VLa mL -(It) solution was used to prepare the mercury film electrode (MFE) and to carry out the stripping step. After a 30 s accumulation interval the analytes were simultaneously detected in the saline matrices without using masking agents. Determination limits of 80 ng L-1 for cadmium and thallium, and 50 ng L-1 for lead were calculated and a R.S.D. ranging from 0.5 to 2.2% (n = 3) was obtained measuring the analytes directly in commercial hemodialysis saline solutions. Recoveries from spiked samples ranging from 94.6 to 102.0% were obtained. The investigated metals were found in concentrations ranging from 2.7 to 5.7 mug L-1 for cadmium, 27.7 to 75.8 mu L-1 for lead and 9.6 to 18.7 mug L-1 for thallium in commercial hemodialysis,solution,,. The PSA method showed to be adequate to the quality control of saline concentrates for hemodialysis. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：954 / 959

页数：6

共 36 条

[31]

Sharma P, 2002, J INDIAN CHEM SOC, V79, P707

[32]

STOEPPLER M, 1999, METALS THEIS COMPOUN, P105

[33]

SUBRAMANIAN KS, 1986, PROG ANAL SPECTROSC, V9, P237

[34] THE STATE-OF-THE-ART OF LIGAND-LOADED COMPLEXING RESINS - CHARACTERISTICS AND APPLICATIONS [J].

TORRE, M ;

MARINA, ML .

CRITICAL REVIEWS IN ANALYTICAL CHEMISTRY, 1994, 24 (5-6) :327-361

[35] Metal nanoparticle-based electrochemical stripping potentiometric detection of DNA hybridization [J].

Wang, J ;

Xu, DK ;

Kawde, AN ;

Polsky, R .

ANALYTICAL CHEMISTRY, 2001, 73 (22) :5576-5581

[36] Stripping potentiometry of indium in aqueous chloride solutions [J].

Wilson, MM ;

Dewald, HD .

MICROCHEMICAL JOURNAL, 2001, 69 (01) :13-19

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