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Determination of Cd and Pb in Phosphorites and Phosphate Fertilizers by Means of a Portable Voltammetric Analyzer Based on “Virtual Instrumentation”
Author(s) -
Maroulis Marios,
Economou Anastasios,
Voulgaropoulos Anastasios
Publication year - 2007
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.200703906
Subject(s) - spectrum analyzer , potentiostat , phosphorite , atomic absorption spectroscopy , mercury (programming language) , analytical chemistry (journal) , chemistry , instrumentation (computer programming) , phosphate , materials science , electrode , chromatography , computer science , electrical engineering , electrochemistry , engineering , physics , organic chemistry , quantum mechanics , programming language , operating system
This works reports the determination of cadmium and lead in phosphorite rocks and phosphate fertilizers by means of a portable voltammetric analyzer based on the “virtual instrumentation” principle. The analyzer consists of a home‐made potentiostat, a conventional three‐electrode cell and a magnetic stirrer interfaced to a PC with control and data acquisition software developed in LabVIEW 7.1. The apparatus operates in the square‐wave anodic stripping voltammetry (SWASV) detection mode and utilizes wax‐impregnated graphite working electrodes covered in‐situ with a thin film of mercury. The phosphorite and fertilizer samples were subjected to pre‐treatment with concentrated acid before the analysis. Different acids were accessed and compared in terms of sensitivity and background characteristics. Comparison of the results obtained by SWASV and atomic absorption spectrometry (AAS) indicates that no statistical difference exists between the two techniques.