5. OPERATING PROCEDURE
5.1. Methods
The Metalyser
®
operating procedure consists of three main steps – Plating
(Conditioning), Analysis and Results. 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:
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
Sb*
WE1
Grey
Mn*
WE1
Grey
Bi*
WE1
Grey
Cr (VI)*
Chromium Electrode
Yellow/Gold
Co*
WE1
Grey
Au*
WE3
Black (no plating required)
Ni*
WE3
Black (no plating required)
Se*
WE1
Grey
Tl*
WE1
Grey
Sn*
WE1
Grey
*Not available as standard
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.
Metalyser® Field Pro HM3000 Instruction Manual v 5.0
www.trace2o.com
