Sampling Guide for Air Contaminants in the Workplace - Irsst

ROHS Substances table
125
ROHS Name
CAS
TWAEV
STEV
Ceiling
(mg/m³)
Notes
Sampling
Device
Flow
L/min
Volume
TWAEV
STEV
(L)
Principle
MRV
µg
CVa
(%)
#
meth.
Remarks
o-Tolidine
119-93-7
Pc
C2
RP
EM
Two glass fiber filters impregnated with
sulfuric acid
1 100 GC-ECD
OSHA
71
The filters must be transferred to vials containing deionized water within 10 hours
of sampling. Contact the IRSST before sampling.
Any compound that reacts with the sulfuric acid on the filters may cause
interference.
Toluene
108-88-3
188 Pc 3M 3500 organic vapour monitor
0,0314 GC-FID 20 3,0 IRSST
16-2
2695 Passive dosimeter
For the monitors, the flow must be considered as being a sampling rate.
According to the data from 3M, the precision (CVsampling) of the sampling rate is
1.9%. Refer to the 3M passive monitor guide on the IRSST's Web site.
Toluene
108-88-3
188 Pc SKC 226-01 activated charcoal tube
Max: 5 GC-FID 20 3,0 IRSST
16-2
2120 Activated charcoal 100/50 mg
0,2
The analysis can be done by gas chromatography coupled with mass
spectrometry (GC-MS, IRSST method #369); in this case the analytical
uncertainty (CVa) is 0.56%.
Toluene diisocyanate
(TDI) (isomers mixture)
26471-62-5
0,036
0,14
EM
S
Impregnated glass fiber filter
970 Impregnated GFF
1,0 HPLC-MS 0,0006
15 IRSST
366
The recommended volume is 15 litres; however the sampling time can be up to 8
hours. Store the samples in a refrigerator before and after sampling.
Five isocyanates can be requested at the same time: HDI, TDI, MDI, IPDI and
HMDI. The analysis is done for the isocyanates present in vapour form only and
the result is expressed as a monomer concentration.
Toluene diisocyanate
(TDI) (isomers mixture)
26471-62-5
0,036
0,14
EM
S
Millipore AP4003705 glass fiber filter
pretreated in the laboratory in series with
a Teflon filter #MSI Z50WP03700
917 PTF filter
GF filter
Vial
1 HPLC-UV- 0,03
Flu
15 IRSST
376
Refer to the sampling guidelines supplied with the equipment. If more than one
isocyanate is requested, provide a process sample. For surface wipe sampling,
contact Laboratory Customer Service.
The two filters in the sampling cassette allow specific analysis of monomer TDI in
vapour form and in aerosol form. The result supplied in the report is the sum of
the monomers of TDI of the two fractions. Determination of the corresponding
oligomers is also done during the analysis. The sampling time can be longer than
15 minutes if the TDI is present in vapour form only.
o-Toluidine
95-53-4
8,8 Pc
C2
RP
EM
Two glass fiber filters impregnated with
sulfuric acid
1 100 GC-ECD
OSHA
73
Contact the IRSST before sampling.
.
Any compound that reacts with the sulfuric acid may cause interference.
m-Toluidine
108-44-1
8,8 Pc Two glass fiber filters impregnated with 1 100 GC-ECD
OSHA
73
sulfuric acid
Contact the IRSST before sampling.
.
All compounds that can react with sulfuric acid can cause interference.
p-Toluidine
106-49-0
8,8 Pc
C2
EM
Two glass fiber filters impregnated with
sulfuric acid.
1 960 GC-ECD
OSHA
73
Keeps for at least 15 days at 21°C. Contact the IRSST before sampling.
All compounds that can react with sulfuric acid can cause interference.