Sampling Guide for Air Contaminants in the Workplace - Irsst

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ROHS Substances table 96 ROHS Name CAS TWAEV STEV Ceiling (mg/m³) Notes Sampling Device Flow L/min Volume TWAEV STEV (L) Principle MRV µg CVa (%) # meth. Remarks Methyl amyl alcohol 108-11-2 104 167 Pc Activated charcoal tube 100/50 mg 0,01 10 à 0,2 3 GC-FID NIOSH 1405 Contact the IRSST before sampling. Methyl n-amyl ketone 110-43-0 233 SKC 226-01 activated charcoal tube Max: 10 GC-FID 49 2,6 IRSST 316-1 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 1.1%. Methyl bromide 74-83-9 19 Pc Two Anasorb 747 tubes 0,05- 3 GC-FID OSHA PV2040 0,2 Contact the IRSST before sampling. Immediate refrigeration after sampling. Methyl tert-butyl ether 1634-04-4 144 Two 400/200 mg activated charcoal tubes 0,1-0,2 96 GC-FID NIOSH 1615 in series Contact the IRSST before sampling. Methyl n-butyl ketone 591-78-6 20 Pc Activated charcoal tube 100/50mg 0,01- 10 GC-FID NIOSH 1300 0,2 Contact the IRSST before sampling. Methyl chloride 74-87-3 103 207 Pc Two 100/50 mg activated charcoal tubes 0,01- 3 in series 0,1 1,5 GC-FID NIOSH 1001 Contact the IRSST before sampling. Methyl chloroform 71-55-6 1910 2460 SKC 226-01 activated charcoal tube 2120 Activated charcoal 100/50 mg Max: 0,2 6 3 GC-FID 450 6,4 IRSST 100-1 Methyl chloroform 71-55-6 1910 2460 3M 3500 organic vapour monitor 2695 Passive dosimeter 0,0309 GC-FID 450 6,4 IRSST 100-1 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 1.0%. Refer to the 3M passive monitor guide on the IRSST's Web site. Methyl 2-cyanoacrylate 137-05-3 9,1 18 XAD-7 tube impregnated with phosphoric acid 0,1 12 HPLC-UV 1,5 OSHA 55 Contact the IRSST before sampling. Alcohols, free radicals or other substances likely to react with methyl 2- cyanoacrylate may cause interference. Methyl demeton 8022-00-2 0,5 Pc XAD-2 tube in series with a mixed 0,2-1 200 GC-FPD NIOSH 5514 cellulose ester filter Contact the IRSST before sampling. NIOSH method 5514 is for demeton® and can be adapted to methyl demeton.
ROHS Substances table 97 ROHS Name CAS TWAEV STEV Ceiling (mg/m³) Notes Sampling Device Flow L/min Volume TWAEV STEV (L) Principle MRV µg CVa (%) # meth. Remarks Methyl ethyl ketone (MEK) 78-93-3 150 300 3M 3500 organic vapour monitor 2695 Passive dosimeter 0,0363 GC-FID 30 6,0 IRSST 25-3 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 2.5%. Refer to the 3M passive monitor guide on the IRSST's Web site. Methyl ethyl ketone (MEK) 78-93-3 150 300 SKC 226-81 Anasorb 747 tube 2190 Anasorb 747 140/70 mg Max: 0,2 10 3 GC-FID 30 6,0 IRSST 25-3 An activated charcoal tube 100/50 mg (#2120) may be used if the samples are refrigerated immediately after sampling of a maximum duration of 15 minutes. This alternative is recommended if other organic substances must be analyzed simultaneously on the same sample, only if the risk of underestimating the concentration of methyl ethyl ketone is assumed by the user. The analysis can be done by gas chromatography couple with mass spectrometry (CG-MS, IRSST method # 369); in this case the analytical uncertainty (CVa) is 1.7%. Methyl ethyl ketone peroxide 1338-23-4 -- -- 1,5 RP XAD-4 tube 1 15 HPLC-UV NIOSH 3508 Substance is unstable at ambient temperature. Contact the IRSST before sampling. Methyl formate 107-31-3 246 368 SKC 226-09 charcoal tube, 11 cm long, 2121 Activated charcoal 400/200 mg 0,2 3 GC-FID 40 4,0 IRSST 349-1 Methyl formate must be sampled specifically because of the sampling device used and the specific desorption solvent. Methyl hydrazine 60-34-4 -- -- 0,38 Pc C2 RP EM Glass fritted tip impinger containing 15 mL of 0.1 M hydrochloric acid 1,5 20 Colo NIOSH 3510 Contact the IRSST before sampling. Other hydrazines, stannous or ferrous ions, zinc, sulfur dioxide, hydrogen sulfide, halogens and oxygen (in the presence of Cu I) may cause interference. Methyl iodide 74-88-4 12 Pc C2 EM Activated charcoal tube 100/50mg 0,01-1 50 GC-FID NIOSH 1014 Contact the IRSST before sampling. Methyl isoamyl ketone 110-12-3 234 SKC 226-01 activated charcoal tube Max: 10 GC-FID 10 3,5 IRSST 265-2 2120 Activated charcoal 100/50 mg 0,2 Methyl isobutyl ketone 108-10-1 205 307 3M 3500 organic vapour monitor 2695 Passive dosimeter 0,030 GC-FID 40 1,4 IRSST 132-3 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 1.3%. Refer to the 3M passive monitor guide on the IRSST's Web site.
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Sampling Guide for Air Contaminants in the Workplace - Irsst

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