Sampling device:
Sampling media required:

#IRSST	Description
918	Cassette with conductive extension and MCE, 25 mm, 0.8 µm

Parameters:
Flow rate: 0,5-16 L/min
TWA sampling volume: 400 L
STEL sampling volume: -
Remarks: Open cassette sampling. A flow rate not exceeding 2.5 L/min is recommended to determine an average concentration. Supply at least 2 blanks per series of samples or 10% of sample total, whichever is highest. Send the samples in a cardboard box supplied by the IRSST (#3010). In relatively clean atmospheres, where the fiber concentration is less than 0.1 fibres/mL, use larger sampling volumes (3000 to 10000L) to obtain quantifiable densities. For high-dust environments, take short-term consecutive samples as detailed in Appendix 1 of Analytical Method MA-243. When the fibers count by transmission electron microscopy (TEM) is desired, the sampling parameters must be adjusted according to the analytical method chosen. It should be noted that the maximum porosity of the filter membranes also changes depending on the method.