Metalyser
®
Soils HM4000
Instruction Manual v3.0
3.3. OPERATING PROCEDURE
3.3.1. METHODS
The Metalyser
®
operating procedure consists of two main steps
– plating
(conditioning) and analysis. The plating step forms a plate on the surface of the
working electrode which can be seen as either a grey or yellow/gold layer on the
tip of the Working Electrode. The quality of this plate is essential to achieving
reliable results.
The following table illustrates which electrode to use for each element.
If WE1 is to be used in the analysis, then WE2 is not part of the circuit and has no role
in the analysis. Likewise for WE1 during analyses using WE2.
When switching between different analyses, the unused electrode needs to be
removed, otherwise results may be affected.
Procedures for each parameter are detailed in the relevant application notes
Elements
analysed
Working Electrode
used
Colour of Working Electrode
after Plating
Cd, Pb
WE1
Grey
Hg
WE2
Yellow/Gold
As
WE2
Yellow/Gold
Cu
WE1
Grey
Zn
WE1
Grey
