Document 65557g6y7VkqNvjmGq54baLJ1

3M 3500/3520 Organic Vapor Monitor Analysis Guide December 1992 ANOTHER STEP TOWARDS BETTER OCCUPATIONAL HEALTH AND SAFETY 700701.7371-4 3M Occupational Health & Environmental Safety Division 3M Center Bldg. 275-6W-01 St. Paul, MN 55144-1000 Utho in U S A. 3H 105610 3M Organic Vapor Monitor Analysis Guide INTORDUCTION The 1992 Analysis Guide contains 32 new compounds and updated capacity and recovery data. In addition, sampling rates on the following fifteen compounds were revised. S-Amyl Alcohol Butyl Acrylate 1-Chloro-1-nitropropane Dimethyl Foramide Furfuryl Alcohol S-Hexyl Acetate Methyl Bromide Methyl Cyclohexanol Phenyl Ether 1,1,1,2-Tetrachloro-2,2-difluoroethane 1,1,2-Trichloro-1,2,2-trifluoroethane Vinyl Bromide Vinylidene Chloride Vinyl Toluene Phenyl Glycidyl Ether USE OF THE ANALYSIS GUIDE TABLES: The Analysis Guide is designed for the customer involved in the analysis of the 3M 3500/3520 Organic Vapor Monitor by the gas chromatograph. The following tables summarize the 3M monitor sampling rate, capacity, recovery coefficient and calculation constants. The analysis guide provides the necessary information to calculate the time-weighted-average concentration in parts per million (ppm) or milligrams per cubic meter (mg/m3). A. Monitor Sample Information Sampling Rate The O compounds in the Sampling Guide tables have been subjected to an extensive amount of laboratory work to verify the sampling rate. The sampling rates given for the remaining compounds in this table were determined from empirical relationships as outlined in a publication on Sampling Rate Validation. All sampling rates have an accuracy of 5%. The sampling rates are tabulated as either cubic centimeters/minute of micrograms/ppm-hour Capacity The capacity of the monitor for each individual compound is a function of molecular structure, vapor pressure, environmental conditions, etc. The capacity is stated in terms of weight (milligrams). For a single contaminant, if the analyst finds the weight collected by the monitor is greater than the defined capacity, then the validity of the sample should be questioned. When sampling multiple contaminants, the combined weights of the contaminants collected should not exceed the defined value for the single contaminant with the lowest capacity. Recovery Coefficients (Desorption Efficiency) The collected sample is removed from the activated carbon wafer for analysis by desorption with carbon disulfide (CS2) or other suitable solvents. In order for the laboratory analyst to determine accurately the amount of contaminant collected by the adsorbent, it is necessary to know the efficiency of the desorption process. The recovery coefficient or desorption efficiency is determined by adding a known weight of contaminant onto the adsorbent and measuring the weight of contaminant in the desorbing solvent. The recovery coefficient is calculated by dividing the recovered weight by the known weight. It Is recommended that each analytical laboratory determine recovery coefficients according to the procedure outlined by the 3M laboratory contained in the Analysis Guide as "Recommended Procedure for Determination of Recovery Coefficients." Recovery coefficients determined by the 3M laboratory are tabulated in the following tables. 1 3M 105611 B. Procedure to Calculate Contaminant Concentrations The time-weighted-average concentration of the environment sampled can be calculated by knowing the length of the sampling period, the contaminant weight determined by gas chromatography, the recovery coefficient and the calculation constant either A or B. The calculation constant A is used to calculate the concentration when expressed in units of milligrams per cubic meter (mg/m3) and constant B when expressed in units of parts per million (ppm). The calculation constants A and B have been determined for every contaminant in the Analysis Guide by the following expressions: 1000 Sampling Rate 1000 X (24.45) Sampling Rate X (Molecular Weight The contaminant concentration can be calculated with the following information: Sampling Information Contaminant Length of Sampling Period (min.) t Contaminant information from Tables in Analysis Guide Calculation Constant A or B Analytical Results Contaminant weight recovered W (Micrograms) corrected for blank Recovery Coefficient (r) Temperature Effects The following expressions calculate the time-weighted-average concentrations at a sampling temperature of 25C (298K) and pressure of 760 mm. When sampling at other environmental conditions, the expressions need to be corrected only for variations in temperature. The expressions can be multiplied by the following temperature correction factors (CFT) for samples collected at temperatures other than 25C (77F). Sampling (C) 44 37 31 25 19 13 7 2 -3 -8 Temperature (F) 111 99 88 77 66 55 45 36 27 18 Temperature Correction Factor (CFT) 0.97 0.98 0.99 1.00 1.01 1.02 1.03 1.04 1.05 1.06 From the above table, every 10-11 above or below 77F requires one percent conection to the calculated time-weighted-average concentration. 2 3M 105612 Calculation Procedures A. #3500 Organic Vapor Monitor The time-weighted-average concentration in milligrams per cubic meter of the contaminant in the environment sampled can be calculated from the following expression: W (micrograms) C(mg/m3) = XA r x t (minutes) The time-weighted-average concentration in parts per million (ppm) of the contaminant can be calculated from the following expression: C(ppm) = W (micrograms) ,, ,, " XD r x t (minutes) If the temperature correction is desired, the time weighted average concentration can be calculated by the following expression: C(mg/m3) C(ppm) = wfflSOTgL xaxcf T r x t (minutes) W (micrograms) XBXCF r x t (minutes) Example Calculation Contaminant Length of Sampling Period (t) Temperature (T) Calculation Constant A or B Contaminant Weight Recovered (W) Recovery Coefficient (r) Using Calculation Constant A: Benzene 420 minutes 75F 28.2 8.83 272 micrograms 1.02 C(mg/m3) = 27.2 X282 (1.02) (420) C = 1.79 mg/m3 Using calculation Constant B: C(ppm) = 27.2 X 8.83 (1.02) (420) C = 0.56 ppm 3 3H 105613 B. #3520 Organic Vapor Monitor with back-up section Upon analysis of each adsorbent the valicfity of the sample can be determined. But in order to assure a valid sample under afl sampling conditions, the ratio of the contaminant weight (W3) on the secondary adsorbent to the contaminant weight (Wp) on the primary adsorbent must meet the following criteria. WS < .50 Wp - Wp - weight collected on the primary adsorbent corrected for recovery and blank (micrograms) Ws - weight collected on the secondary adsorbent corrected for recovery and blank (micrograms) t - length of sampling period (minutes) (WP + 2.2 WS) X A C mgrm3 = t (WP + 2.2 Ws) X B C ppm = t A - calculation coefficient (mg/m3) B - calculation coefficient (ppm) 4 3M 105614 Recommended Procedure For Determination of Recovery Coefficients for 3M Organic Vapor Monitor #3500/3520 3M publishes the Recovery Coefficient lor many of the organic vapors in the 3500 Compound Guide. However, we encourage the user to verify the recovery coefficients, since techniques and presence of multiple contaminants can affect recovery coefficients. The recovery coefficient is determined by vapor-state spiking of monitors. This is accompanied by the following steps: 1) Remove plastic ring and white film from a monitor. 2) Place a 2.5 cm diameter fitter paper on spacer plate. 3) The closure cap is snapped on the monitor. 4) Calculate the amount of material to be injected. The following formula will calculate the injection amount, in milligrams, that corresponds to the amount that would be collected by a monitor at sampling conditions chosen. By varying the chosen concentration levels and exposure times, a Recovery Coefficient curve can be generated. W = (Kq) x (C) x (t) x (ICH5 rr^/cm3) Where: W = Amount of liquid injection in milligrams Kq = Sampling rate of monitor cm3/min. C = Average concentration in mg/m3 t = Sampling time in minutes For compounds that are solid at room temperature, prepare a solution in Carbon Disulfide such that no more than a 5 microliter injection is needed to spike the required number of milligrams of compound. A suggested starting point would be assuming an average concentration of one P.E.L (Permissible Exposure Limit) and an 8 hour exposure period, as long as the amount in milligrams does not exceed the recommended exposure limit of monitor. 5) Inject the known quantity of the organic material onto the filter paper through the center port. 6) The monitor is allowed to sit 16-24 hours to allow total transfer of the organic material from the filter paper to the sorbent before elution. 7) Remove filter paper from monitor. 8) Proceed with elution and determination of amount recovered by G.C. analysis. See #3500 Organic Vapor Monitor Instructions for Use. For further assistance, call 3M Occupational Health and Environmental Safety Division Technical Service toll free on 1-800/243 4630, or write 3M Occupational Health and Environmental Safety Division, 3M Center, PO Box 33155, St. Paul, Minnesota 55144-1000. 5 3M 105615 Analysis Guide Sampling Rate (cc/min) Capacity Recovery (mg) Coefficient Acetone* Acetonitrile Acrylonitrile Ally! Alcohol Allyl Chloride i-Amyl Acetate n-Amyl Acetate* s-Amyl Acetate i-Amyl Alcohol* n-Amyl Alcohol (1-Pentanol)' s-Amyl Alcohol (2-Pentanol) Benzene* Benzyl Chloride Bromoform 1,3-Butadiene^ i-Butyl Acetate* n-Butyl Acetate s-Butyl Acetate* t-Butyl Acetate Butyl Acrylate i-Butyl Alcohol* n-Butyl Alcohol* s-Butyl Alcohol t-Butyl Alcohol Butyl Cellosolve (2-Butoxyethanol)* Butyl Cellosolve Acetate (2*Butoxy ethyl Acetate)* Butyl Glyddyl Ether (BGE) t-Butyl Methyl Ether (MTBE)* prtert-Butyltoluene* Camphor Carbon Disulfide Carbon Tetrabromide Carbon Tetrachloride' Cellosolve (2-Ethoxyethanol)* Cellosolve Acetate* (2-Ethoxyethyl Acetate) Chlorobenzene* Chlorobromomethane* Chloroform 1 -Chloro-1 -nitropropane Chloroprene (2-Ch!oro-1,3-butadiene) o-Chlorostyrene o-Chlorotoluene 40.1 0.9 48.2/ 43.8 40.4 35; 1 27.2 26.0 0.5 27.2 32.3 0.4 31.2 0.4 31.2 35.5 0.6 27.2 29.3 42.8 31.0 0.3 31.6 28.6 0.4 29.4 27.3 35.9 0.7 34.3 0.7 34.8 35.2 28.2 0.6 24.3 1.0 27.0 32.9 1.4 20.7 0.4 21.4 42.8 26.6 30.2 0.4 32.4 0.9 26.6 0.4 29.3 0.6 34.4 0.9 33.5 28.6 32.2 26.0 27.3 3 0.1 4 10 1 >25 >25 >25 >25 >25 >25 13 >25 >25 0.4 >25 25 >25 25 >25 >25 >25 19 13 >25 >25 >25 13 >25 >25 1 -- >25 >25 >25 >25 10 7 >25 5 >25 >25 0.87 0.82 0.79 0.40 0.73 -- 0.94 -- 0.99 + 0.85 + 0.99 + 1.02 1.05 1.05 -- - 1.04 1.07 1.05 1.01 1.02 + 0.98 + 0.97 + 0.80 1.03+ 0.98 0.87 1.01 1.10 -- 0.82++ -- 1.05 0.95+ 1.03 1.00 1.00 0.98 -- _ 0.80 -- Calculation Constant A (mg/m3) 24.9 20.8 22.8 24.8 28.5 B (PPm) 10.5t 12.37 10.53 10.43 9.05 36.8 6.90 38.6 7.26 36.8 6.91 31.0 8.63 32.1 8.91 32.1 8.89 28.2 8.83 36.8 7.08 34.1 3.30 23.4 10.53 32.3 6.80 31.7 6.67 35.0 7.37 34.0 7.17 36.6 6.99 27.9 9.20 29.2 9.63 28.7 9.44 28.4 9.39 35.5 7.35 41.2 6.28 37.0 6.97 30.4 8.43 48.3 7.98 46.7 7.52 23.4 7.52 37.6 2.77 33.1 5.26 30.9 8.39 37.6 6.96 34.1 7.38 29.1 5.51 29.9 6.13 35.0 6.92 31.1 8.53 38.5 6.77 36.6 7.05 + Methylene Chloride as the solvent T See Technical Data Bulletin 63 ++ Acetonitrile as the Solvent 6 3M 105616 Cumene* Cyclohexane* Cyctohexanol* Cyclohexanone* Cyclohexene* Cyclopentadiene Cyclopentane n-Decane* Diacetone Alcohol* o-Dichlorobenzene* p-Dichlorobenzene* 1,1-Dichloroethane 1,2-Dichloroethylene* Dichloroethyl Ether 1,1 -Dichloro-1 -nitroethane 1,1 -Dichloro-2,2,2-trifluoroethane (HCFC-123)* Dicyclopentadiene Diethyl Ketone Diisobutyl Ketone* Dimethylacetamide Dimethyl Formamide p-Dioxane Dipropylene Glycol Methyl Ether Dipropyl Ketone Divinyl Benzene n-Dodecane* Enflurane (2-Chtoro-l ,1,2-trifluoroethyl difluoromethyl ether) Epichlorohydrin (1 -Chloro-2,3-epoxypropane) Ethyl Acetate* Ethyl Acrylate Ethyl Alcohol Ethyl Benzene Ethyl Bromide* Ethyl Butyl Ketone (3-Heptanone) Ethylene Chlorohydrin (2-Chk>roethanol) Ethylene Dibromide (1,2-Dibromoethane)* Ethylene Dichloride (1,2-Dichloroethane)* Ethyl Ether Ethyl Formate Ethyl Mercaptan Furfural Furfuryl Alcohol Gasoline* Glyddol (2,3-Epoxy-1-propanol) Analysis Guide Sampling Rate (cc/min) 24.5 0.9 32.4 0.7 29.5 0.3 28.9 0.3 32.3 0.4 39.5 36.2 23.1 0.5 28.2 0.4 27.8 0.6 27.8 0.6 33.2 35.2 0.5 26.1 28.5 Capacity (mg) >25 22 >25 >25 22 - >25 >25 >25 >25 4 1 >25 >25 Recovery Coefficient 0.96 1.07 1.0 + 0.97 1.02 - -- 1.04 1.04 + 0.95 0.95 -- 0.99 -- -- 30.9 2.6 23.6 32.7 24.6 0.8 32.0 35.5 34.5 25.3 27.8 23.3 21.5 0.9 14 - - >25 - >25 >25 >25 - - >25 0.99 - - 1.07 0.89 + 0.74 + 0.80 - - -- 1.04 28.3 29.6 34.5 0.6 32.2 51.2 27.3 36.4 0.3 28.0 33.9 29.6 0.4 33.2 0.7 36.8 38.8 41.1 34.3 30.6 30.5 1.3 37.1 4 >25 10 19 12 >25 1 >25 >25 >25 18 7 1 - >25 >25 - >25 0.81 0.95 1.01 0.96 0.44 0.92 1.03 - _ 1.04 1.02 1.02 - - 0.71 + 0.76 + 1.05 -- Calculation Constant A (mg/m3) B (PPm) 40.8 30.9 33.9 34.6 31.0 25.3 27.6 8.32 8.98 8.27 8.63 9.23 9.36 9.63 43.3 7.44 35.5 7.47 36.0 5.98 36.0 5.98 30.1 7.44 28.4 7.16 38.3 6.55 35.1 5.96 32.4 42.4 30.6 40.7 31.3 28.2 29.0 39.5 36.0 42.9 46.5 5.17 7.84 8.68 7.00 8.77 9.42 8.05 6.53 7.70 8.06 6.68 35.3 33.8 29.0 31.1 19.5 36.6 27.5 35.7 29.5 33.8 30.1 27.2 25.8 24.3 29.2 32.7 32.8 27.0 4.68 8.88 8.05 7.59 10.38 8.45 6.16 7.66 8.90 4.39 7.44 8.98 8.52 9.57 7.42 8.14 7.49 8.91 + Methylene Chloride as the solvent 7 3M 105617 Halothane (2-Bromo-2-Chloro1,1,1-trifluoroethane) n-Heptane* Hexachlorobutadiene Hexachlorocydopentadiene Hexachloroethane n-Hexane* Hexane Isomers* s-Hexyl Acetate Isoflurane (Forane) Isooctyl Alcohol Isophorone* Isopropoxyethanol Isopropyl Acetate Isopropyl Alcohol Isopropyl Ether Isopropyl Glycidyl Ether Mesitylene (Trimethyl Benzene)* Mesityl Oxide* Methyl Acetate* Methyl Acrylate Methylal (Dimethoxymethane) Methyl Amyl Ketone (2-Heptanone) Methyl Bromide Methyl Butyl Ketone (2-Hexanone)* Methyl Cellosolve (2-Methoxyethanol)* Methyl Cellosolve Acetate (2-Methoxyethyl Acetate)* Methyl Cyclohexane* Methyl Cyclohexand Methylene Chloride (Dichloromethane)*$ Methyl Ethyl Ketone (2-Butanone)* Methyl Formate 5-Methyl-3-heptanone (Ethyl Amyl Ketone) Methyl Iodide Methyl Isoamyl Ketone Methyl Isobutyl Carbinol (Methyl Amyl Alcohol) Methyl Isobutyl Ketone (Hexone)* Methyl Isopropyl Ketone Methyl Methacrylate 1 -Methyl-2'pyrrolidinone alpha-Methyl Styrene* Morpholine Analysis Guide Sampling Rate (cc/min) Capacity Recovery (mg) Coefficient 30.2 28.9 0.7 22.9 22.1 26.7 32.0 0.7 32.0 0.7 25.2 28.3 25.1 21.7 0.7 29.5 31.7 39.4 31.2 29.1 26.3 0.7 31.21.2 37.0 0.6 35.8 37.9 27.9 40.9 29.7 0.7 36.3 0.4 29.0 0.5 28.9 0.4 25.3 37.9 0.3 4 >25 -- - >25 18 18 >25 - - >25 - 15 6 10 >25 >25 >25 2 11 5 >25 0.5 >25 >25 >25 >25 >25 3 1.08 -- -- -- 1.05 1.05 -- - 0.75 - 1.05 + 0.61 1.06 0.85 1.00 0.94 0.92 - - 1.00 0.83 + 1.00 1.05 - 0.90 36.3 0.9 45.0 26.4 36.7 28.0 29.2 30.0 0.4 32.8 31.8 28.8 25.0 0.5 33.1 12 0.2 >25 0.2 >25 >25 >25 24 - >25 -- 0.92 0.93 + -- - - 1.06 - 1.05 0.43 1.01 -- Calculation Constant A (mg/m3) B (ppm) 33.1 4.10 34.6 8.46 43.7 4.09 45.2 4.06 37.5 3.86 31.3 8.88 31.3 8.87 39.7 6.73 35.3 4.68 39.8 7.48 46.1 8.16 33.9 7.96 31.5 7.56 25.4 10.34 32.1 7.67 34.4 7.24 38.0 7.75 32.1 8.00 27.0 8.93 27.9 7.94 26.4 8.49 35.8 7.69 24.4 6.30 33.7 8.23 27.5 8.86 34.5 7.14 34.6 8.63 39.5 8.46 26.4 7.59 27.5 22.2 37.9 27.3 35.7 34.2- 33.3 30.5 31.5 34.7 40.0 30.2 9.35 9.06 7.24 4.69 7.66 8.21 8.15 8.65 7.69 8.56 8.29 8.48 + Methylene Chloride as the solvent t See Technical Data Bulletin 71 8 3M 105618 Naptha(VM&P)* Napthalene n-Nonane* n-Octane* n-Pentane* 2,4-Pentanedione 2-Pentanone (Methyl Propyl Ketone)* Perchtoroethylene* Phenyl Ether Phenyl Glyddyl Ether n-Propyl Acetate* n-Propyi Alcohol* Propylene Dichloride (1,2-Dichloropropane)* Propylene Glycol Monomethyl Ether (PGME)* Propylene Glycol Monomethyl Ether Acetate (PGMEA)* Propylene Oxide* n-Propyl Nitrate Resorcinol Stoddard Solvent Styrene* 1,1,1,2-Tetraehloro- 2,2-difluoroethane 1,1,2,2-Tetrachloro- 1,2-difluoroethane 1,1,2,2-Tetrachloroethane Tetrahydrofuran Toluene* 1,1,1-Trichloraethane (Methyl Chloroform)* 1,1,2-Trichloroethane* Trichloroethylene* 1,2,3-Trichloropropane 1,1,2-Trichloro- 1,2,2-trifluoroethane Vinyl Acetate Vinyl Bromide Vinyl Chloride* 4-Vinyl-1 -cydohexene* Vinylidene Chloride Vinyl Toluene Xylene* Analysis Guide Sampling Rate (cc/mln) 33.2 0.7 24.6 24.6 0.6 26.6 0.6 35.3 0.9 31.7 Capacity (nifl) 20 >25 >25 >25 7 -- Recovery Coefficient 1.04 - 1.09 1.08 1.02 0.85 Calculation Constant A (mg/m3) B (ppm) 30.1 7.36 40.7 7.76 40.7 7.75 37.6 8.06 28.3 9.62 31.5 7.70 33 0.5 28.3 0.5 20.3 22.2 30.1 0.5 39.7 0.7 23 >25 >25 >25 21 25 1.03 1.05 0.93 1.01 0.93 + 30.3 35.3 49.3 45.0 33.3 25.2 8.62 5.20 7.08 7.33 7.96 10.26 30,6 0.4 32.4 2.1 25.2 1.1 37.7 2.5 33.3 25.8 24.3 26.8 0.8 27.5 28.2 28.4 37.2 31.4 0.6 30.9 0.3 29.7 0.6 31.1 0.2 27.4 29.1 35.8 37.0 40.8 0.5 27.91.8 35.1 25.1 27.3 0.5 25 >25 >25 -- >25 - >25 >25 5 5 >25 8 25 20 >25 20 >25 18 17 0.3 0.04 - 0.5 >25 >25 1.04 0.92+ 0.99 1.00 1.05+ - 0.82 0.94 _ - 0.89 1.09 1.05 1.03 1.02 1.00 - 1.11 1.02 -- 1.02 1.13 -- 1.07 32.7 30.9 39.7 26.5 30.0 38.8 41.2 37.3 36.4 35.5 35.2 26.8 31.8 32.4 33.7 32.2 36.5 34.4 27.9 27.0 24.4 35.8 28.5 39.8 36.6 7.07 8.37 7.34 11.17 6.99 8.61 6.99 8.77 4.36 4.25 5.12 9.13 8.46 5.95 6,19 6.00 6.07 4.48 7.94 6.18 9.56 8.10 7.19 8.24 8.44 + Methylene Chloride as the solvent 3H 105619 9