Calculations To Obtain Conversion Factor

B) Scanned area : 20 microns (length) x 20 microns

C) Volume of air sampled per minute = 5 litres / min

5 x 0.001000028 = 0.005 m3 To convert 1 litre into cubic metre

9600

1,000,000

x 7200 = 69.12 litres

Therefore, conversion factor = 1000 = 14.46 (conversion factor)

The number of spores, thus scanned, multiplied by conversion factor would give the number of spores in m3 of air. For example 5 x 14 = spores = 70 spores m3 of air.

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