Metrohm Multi-Mode Electrode pro - Manual (Page 17)

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3 Preparing the MME pro for use
6.1246.120 Multi-Mode-Electrode pro
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3 Preparing the MME pro for use
Caution
When handling mercury please observe the relevant safety regulations
(see also Mercury Handling Guideline 8.000.5054EN).
In order to ensure that no mercury can escape into the environment,
the following procedures must always be carried out in a dry drip pan
(6.2711.030).
Mercury which escapes into the drip pan must be completely collected.
Larger amounts can be poured out of the drip pan into a closed mer-
cury collection container. Small drops can be collected with the mercury
drop catcher (6.2406.000).
Before you can work with the MME pro the following steps must be car-
ried out:
￭ Mounting the capillary (see Chapter 3.1, page 9).
￭ Inserting the needle (see Chapter 3.2, page 12).
￭ Filling in mercury (see Chapter 3.3, page 14).
￭ Installing the MME pro in the instrument (see Chapter 3.4, page 16).
￭ Adjusting the needle valve (see Chapter 3.5, page 16).
￭ Testing the electrode function (see Chapter 3.6, page 18).
3.1 Mounting the capillary
There are two types of capillaries which can be mounted into the MME
pro, depending on the application:
￭ Silanized capillaries (6.1226.050) are especially suitable for voltammet-
ric determinations at the HMDE in acidic to slightly alkaline solutions
which do not contain organic solvents.
￭ Non-silanized capillaries (6.1226.030) are especially suitable for polaro-
graphic determinations at the DME or SMDE and for voltammetric
determinations at the HMDE in all types of solutions, especially alkaline
solutions with pH>10 or in solutions containing solvents, where silan-
ized capillaries cannot be used.
Mounting the capillary
To carry out this procedure you need the MME pro and the following
accessories: