page 14 Cleaning and maintenance
4 Cleaning and maintenance
SPAC S PA C S PAC SPAC
4.1 Cleaning the sample vessel
The first two cleaning steps should also be carried out before a sample vessel is
used for the first time.
Do not use cleaning agents which contain surfactants (soap, rinsing agents) or
any alkaline cleaning agents.
Use only pure solvent and clean, lint-free cloths.
4.1.1 Step 1: Cleaning with water
Rinse out the sample vessel under hot flowing water, wiping it alternately with
paper.
Rinse the sample vessel with distilled water.
4.1.2 Step 2: Check cleanliness
Wipe out the sample vessel with moistened tissue paper.
If there is a squeaking sound when wiping, this indicates that the sample
vessel is mostly free of surfactant residues. Rinse the sample vessel again
with distilled water. Dry the sample vessel in a drying cabinet.
If the paper slides on the glass, there are surface-active substances on the
surface of the glass. In this case, carry out more intensive cleaning by
performing the step described below.
4.1.3 Step 3 (if necessary): Scarfing
Scarf the sample vessel with the flame of a Bunsen burner.
When scarfing use crucible tongs and wear fire-proof gloves.
Allow the glass to cool on a heat-resistant sheet before using it again.
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