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Electrochemical Procedure for Determination of Mercury in Waste Soils Samples
Author(s) -
Górecki Jerzy,
Golas Janusz
Publication year - 2001
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/1521-4109(200105)13:8/9<719::aid-elan719>3.0.co;2-7
Subject(s) - mercury (programming language) , dropping mercury electrode , chemistry , electrochemistry , anodic stripping voltammetry , working electrode , electrode , soil water , polarography , electrochemical cell , inorganic chemistry , analytical chemistry (journal) , environmental chemistry , environmental science , computer science , soil science , programming language
The new electrochemical procedure for determination of mercury in waste soil samples consists of two parts. In the first part of the procedure mercury is thermally released from its compounds at a temperature of about 900 °C. Then the mercury vapors are condensed on the probe walls in low temperature. Subsequently the mercury is dissolved in the mixture of acids. The solution, is UV irradiated which oxidizes the organic matter that is released from the soil simultaneously with the mercury. In the second part of the procedure mercury is determined at a gold electrode. The electrochemical determination procedure consists of three steps: electrode activation, mercury reduction on the electrode surface and the measurement with differential pulse stripping voltammetry (DPSV). For the first two steps of electrochemical determination the flow system is applied. The flow system which makes the determination easier, consists of a pump, wall‐jet type cell, two‐way valve and Tygon tubing. The method is very cheap, simple and versatile for determination of mercury in waste soils.