Air Sampling Procedures For Chemicals Contaminants (continued)
Chemical
Sampling Method and
Sampling Rate* Sample Volume in
Contaminant
Collecting Medium
Per Minute
Liters**
Minimum Maximum
12
1
20-200 ml
Methylene
200/400 mg charcoal
or
chloride
tube
OR
30 min-1 hr
passive monitor
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Preferred:
Direct reading NO2
dioxide
meter
OR
4
2 (TWA)
20-50 ml
dioxide tube (ORBO-76)
0.4 liter
Sample
Alternate:
until a
Fritted glass bubbler
medium
(10 ml of Saltzman
shade of
Reagent)
purple
develops
but not to
exceed 10
minutes.
Either way, immediate
analysis is preferred.
Color fades
approximately
3 percent each day
50/100 mg TenaxR tube
Nitroglycerin
0.2-1 liter
15
50
Nitrous oxide
analyzer
(that is, MIRANR)
Nuisance
Filter cassette, closed
1-2 liters
400
1000
Particulates
face with spacer, (PVC,
pre-weighed)
1-2 liters
400
1000
Oil mist
Filter cassette, closed
face with spacer, pre-
weighed (PVC 5.0 um
filter)
MD0165
D-7