Metrohm Multi-Mode Electrode pro - Manual (Page 9)

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1 Introduction
6.1246.120 Multi-Mode-Electrode pro
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1 Introduction
1.1 Instrument description
The Multi-Mode electrode pro (MME pro) combines the most important
polarographic and voltammetric mercury electrodes in one single con-
struction:
￭ Dropping Mercury Electrode (DME)
This is the classic mercury electrode. The mercury drops fall continu-
ously from the capillary. Drop intervals are synchronized with the volt-
age steps of the measurement.
￭ Static Mercury Drop Electrode (SMDE)
The SMDE combines the properties of the DME and the HMDE: mer-
cury is forced through the glass capillary until a drop forms at the tip of
the capillary. The measurement is performed on the constant surface
of this stationary mercury drop (as with the HMDE). For each voltage
step, a new drop is produced (as with the DME).
￭ Hanging Mercury Drop Electrode (HMDE)
Mercury is forced through the glass capillary until a drop forms at the
tip of the capillary. The entire sweep is performed on the constant sur-
face of the stationary mercury drop.
1.2 Intended use
The Multi-Mode-Electrode pro serves as a working electrode in voltamme-
try. It contains mercury as electrode material.
The usage of the Multi-Mode-Electrode pro therefore requires that the
user have basic knowledge in the handling of dangerous substances in
laboratories.
The Mercury Handling Guidelines (8.000.5054XX) contains important
information on mercury and the save handling of the substance. The
safety rules contained therein must be strictly observed. The guideline can
be downloaded form
http://documents.metrohm.com . Enter the docu-
ment number into the search field.