WLN-CA.W.31.2	Determination of undissolved substances in water by means of a paperfilter, glass fiber filter or membrane filter	in-house method
Principle:	The quantity of undissolved components is determined by weighing of a paper filter, glass fibre filter or membrane filter before and after filtration of a specific quantity of the sample to be analysed.
Determination:	Suspended matter
Performance characteristics:
Matrices qualified by the Dutch RvA:	Wastewater, Drinking water, Surface water
Reporting limit:	3 mg/l, matrix dependent
Measurement uncertainty:	50%
Sustainability:	2 days
Sampling bottle:	Glass , green , 1000 ml (fill up to cap)

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