IN-FLOW SPECIATION OF COPPER, ZINC, LEAD AND CADMIUM IN FRESH-WATERS BY SQUARE-WAVE ANODIC-STRIPPING VOLTAMMETRY .2. OPTIMIZATION OF MEASUREMENT STEP

被引：33

作者：

MARTINOTTI, W

QUEIRAZZA, G

GUARINONI, A

MORI, G

机构：

[1] UNIV PARMA,I-43100 PARMA,ITALY

[2] ENEL SPA,ENVIRONM & MAT RES CTR,I-20134 MILAN,ITALY

来源：

ANALYTICA CHIMICA ACTA | 1995年 / 305卷 / 1-3期

关键词：

ANODIC STRIPPING VOLTAMMETRY; CADMIUM; COPPER; LEAD; FRESH WATERS; TRACE METALS; ZINC;

D O I：

10.1016/0003-2670(94)00502-D

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The measurement unit of an automatic system for in situ determination of dissolved Zn2+, Cd2+, Pb2+ and Cu2+ in fresh waters with square wave anodic stripping voltammetry (SWASV), is described. The effect of supporting electrolyte solution concentration, pre-electrolysis potential, metal deposition time and thickness of the Hg-film was studied by means of a full factorial experimental design and the significativity levels were determined by a multifactorial ANOVA. Subsequently, the parameters were optimized by using a sequential modified simplex method. Under the so found experimental conditions, the effects of foreign ions and of dissolved oxygen have been investigated, the stability of calibration curves have been studied and the detection limits determined.

引用

页码：183 / 191

页数：9

共 9 条

[1] EFFECT OF SUPPORTING ELECTROLYTE CONCENTRATION IN PULSED STRIPPING VOLTAMMETRY AT THIN-FILM MERCURY-ELECTRODE [J].