5 carrying out sample digestion – Metrohm 909 UV Digester User Manual
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909 UV Digester
5 Carrying out sample digestion
The following steps can be used as a model describing the steps for sam-
ple digestion using the 909 UV Digester. You can find additional useful
tips on analysis methods in the Application Bulletins and Application Notes
listed in Chapter 6, page 31.
Preparing the 909 UV Digester
1 Installing the 909 UV Digester (see Chapter 3, page 9).
2 Set the sample setpoint temperature to the desired value (see "Sam-
3 Set the radiating time to the desired period (see "Rad. Time", page
21).
Preparing samples
Warning
Samples with increased organic load
Overflowing chemical substances can cause chemical burns and skin
damage. They can also damage the instrument.
Ensure that the sample vessel with the temperature sensor has the
same sample as the rest of the sample vessels. Otherwise the PTFE stop-
pers can be pushed out during heating and the sample can overflow.
Wear protective glasses, protective gloves and work clothes suitable for
laboratory work.
1 Add, at most, 12 mL of sample to be broken down per sample ves-
sel.