L1 /
7
CH3041
AIR SAMPLING
DEVICES
• Whole air
samples may be
collected in SUMMA stainless
steel canisters or TEDLAR plastic
bags & then analysed back in the
lab. A diaphragm pump is often
used to place air into the bags or
canisters. eg. VOC 1 ppb
collected in SUMMA stainless
steel canisters or TEDLAR plastic
bags & then analysed back in the
lab. A diaphragm pump is often
used to place air into the bags or
canisters. eg. VOC 1 ppb
• Many air quality methods now use direct reading
instruments which are taken out into the field or mounted
permanently avoiding sampling artifacts.
• This
instrument analyses
for SO2 using UV, with a built in
reference cell .eg. SO2 10 ppb
for SO2 using UV, with a built in
reference cell .eg. SO2 10 ppb
