— 21.02.2020 —
2.2.3 Sample material
Warning! Toxic substances!
The sparking process produces a black precipitate (metal condensate). The
condensate could be
toxic or flammable, depending on the sample material. Metal
vapors may be generated by sparks of the sample material. Depending on the
sample material, these vapors may be toxic, e.g. if using heavy metals or other
hazardous metals during the test.
Protect
ive gloves and safety goggles must always be worn when cleaning the
spark stand and when cleaning the gas-
washing bottle or the filter bottle. This
also applies when replacing the filter insert. If metals with toxic components
have been sparked off, wearing a breathing mask to prevent the inhalation of
condensate particles is mandatory.
When disposing of the condensate, compliance with legal regulations and fire
prevention instructions is mandatory.
If the samples contain toxic substances, an extraction system must be
installed at the spark stand.
In this case, the gas escaping from the spectrometer's exhaust pipe must be
channeled to the outside of the building.
The installation of an extraction system and the discharge of the exhaust gas
into the open air makes it easier to comply with the maximum permissible
pollutant concentrations in the breathing air below the applicable limit values,
MAK values (Maximale Arbeitsplatzkonzentration: maximum workplace
concentration) or comparable national regulations. Compliance with these
limits is the sole responsibility of the owner of the spectrometer. If samples
with toxic components must be measured, further protective actions such as
wearing breathing protection may be necessary.
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