Document KJmaxv1jgROZB8Z4750x0XYex
COMPOUND GUIDE FOR 3M #3500 ORGANIC VAPOR MONITOR
Effective Feb. 1, 1979
I, RECOMMENDED COMPOUNDS
THE TABLE BELOW GIVES THE SAMPLING RATES OF MANY ORGANIC COMPOUNDS FOR WHICH THE 3M #3500 ORGANIC VAPOR MONITOR IS RECOMMENDED FOR ACCURATE SAMPLING, THE TABLE IS NOT EXHAUSTIVE AND WILL BE UPDATED PERIODICALLY, TO GUARANTEE RECEIPT OF PERIODIC UPDATES, COMPLETE AND SEND THE REGISTRATION CARD CONTAINED IN EVERY BOX OF MONITORS.
The (*) compounds have been subjected to an extensive amount of laboratory work in order to verify both the Sampling Rate and the Recovery Coefficient. This thorough lab verification may eliminate as much as 10% error which may occur when using published diffusion coefficient data to calculate sampling rates. The working range given is for normal humidity and`is from the minimum detectable amount to the upper exposure limit. Individual 3M Qualification Data Sheets can be supplied to the analyst for each of the (*) compounds.
The Sampling Rates given for the remaining compounds in this table were calculated from published diffusion coefficients which have not yet been verified experimentally by the 3M Laboratory. Sampling Rates obtained in this manner may differ by as much as 10%, but usually no more than 4% from a value experimentally determined. However, results obtained are well within the accuracy and precision required of monitoring systems by NIOSH/OSHA.
Recovery Coefficients are not yet available for all compounds. The
procedure would be the same as used by the 3M Laboratory to determine
the Recovery Coefficients for the (*) compounds and is available to
the analyst.
Working Range(a) Sampling Rate
Average Recovery
ComDOund
(ppm-hours)
(cmVmin.)
Coefficient
*Acetone *Acrylonitrile
Allyl Alcohol Allyl Chloride Amyl Acetate Amyl Alcohol sec-Amyl Alcohol Amyl Butyrate
2.5 - 1800 2.0 - 300 2.5 - 1800 2.5 - 1800 0.8 - 2000 1.0 - 1500 1.0 - 2000 0.5 - 3000
35.4 37.1 36.1 34.5 21.6 25.3 25.8 17.2
0.93 0.84
3M 0051
Working Range Compound________________ (ppm-hours)lb)
Amyl Isobutyrate Amyl Formate iso-Amyl Formate
0.5 - 3000 0.8 - 2000 0.8 - 2000
Amyl Propionate
0.8 - 2000
*Benzene
0.8 - 2000
Benzonitrile
0.8 - 2000
Benzyl Acetate
0.5 - 3000
Benzyl Alcohol
0.8 - 2000
Benzyl Chloride Bromoform
0.8 - 2000 5.0 - 350
Butyl Acetate
1.0 - 2000
Isobutyl Acetate
1.0 - 2000
Butyl Alcohol
1.2 - 1500
Isobutyl alcohol
1.2 - 1500
sec-Butyl Alcohol
1.2 - 1500
t-Butyl Alcohol
1.2 - 1500
Butyl Ether
1.0 - 2000
Butyl Propionate
1.0 - 2000
*Carbon Tetrachloride 5.0 - 500
Cellosolves
Cellosolve
2.5 - 2000
(Ethylene glycol monoe thyl ether)
Cellosolve Acetate 0.8 - 3000 (Ethylene glycol monoethyl ether acetate)
Methyl Cellosolve
2.5 - 1800
(Ethylene glycol raonomethyl ether)
Diethylene Glycol
2.5 - 2000
Diethylene Glycol Monoethyl Ether
Chlorobenzene
1.0 - 2500 0.8 - 2000
*Chloroform
5.0 - 350
p-Cymene
0.5 - 3000
Diacetone Alcohol
1.0 - 2000
1, 2-Dibromoethane
2.5 - 500
Dibutyl Phthalate
0.8 - 3000
1, 1-Dichloroethane
2.5 - 350
1, 2-Dichloroethane
(ethylene dichloride)
2.5 - 350
Sampling Rate (cm3/min.)
17.6 23.5 23.9 19.8 33.0 25.1 21.2 25.2 25.2 27.2 23.8 24.4 30.5 31.2 31.5 30.9 19.0 21.5 26.5
RecoveryCoefficient
0.99
1.02
27.9
21.6
29.7
25.8 21.6
26.4 31.6 22.3 22.9 29.2 14.9 32.5 32.1
3M 005112
2
Compound
Working Ranged (DDm-hoursr
Sampling Rate (cmVmin)
Dichloromethane (methylene chloride)
5.0 - 100
37.9
Dioxane
2.5 - 1500
32.6
Diethyl Phthalate
0.8 - 2000
17.6
*Ethyl Acetate
1.2 - 3000
29.4
Ethyl Benzene
0.8 - 2000
26.7
Ethyl Bromide
2.5 - 200
35.0
Ethyl Butyrate
0.8 - 3000
23.7
Ethylene Chlorohydrin 2.5 - 200
34.1
Ethylene Dichloride
(see 1,2-Dichloroethane)
Ethyl Ether
2.5 - 100
32.5
Ethyl Propionate
1.2 - 3000
27.1
*Heptane
0.8 - 900
27.7
*Hexane
0.8 - 1500
28.2
Isobutyl Acetate
1.0 - 2000
24.4
Isobutyl Alcohol
1.2 - 1500
31.2
Isopropyl Acetate
1.0 - 3000
27.3
Isopropyl Benzene
0.5 - 2000
24.0
Mesitylene
0.8 - 2000
23.5
Mesityl Oxide
0.8 - 2000
26.9
Methyl Acetate
2.5 - 500
34.6
Methyl Butyrate
1.0 - 2000
26.4
Methyl Chloroform
(see 1,1,1-Trichloroethane)
Methyl Isobutyrate
1.0 - 2000
26.5
Methyl Isobutyl Ketone 2.0 - 1800
26.6
*Methyl Ethyl Ketone 2.5 - 400
31.2
Methyl Propionate
1.0 - 1500
30.5
Methyl Propyl Ketone 2.0 - 1500
28.1
Methylene Chloride
(see Dichloromethane)
Nitrobenzene
0.8 - 2000
25.5
Octane
0.8 - 2000
21.8
Pentane
1.0 - 500
29.8
Perchloroethylene
(see Tetrachloroethylene)
Propyl Acetate
1.0 - 3000
27.2
* Stoddard Solvent
24.3
* Styrene
0.8 - 2000
27.3
2-Tetrachloroe thane
2.5 - 500
25.6
Recovery Coefficient
0.92 0.98
1.04 0.95
0.95
1.00 0.97
3M 005113
3
Compound
Working Range (ppm-hours)(b)
Tetrachloroethylene
(Perchloroethylene)
*Toluene *Trichloroethylene *1, 1,1-Trichloroethane 1,1,2 Trichloroethane *Vinyl Chloride *m-Xylene
o-Xylene p-Xylene
2.5 - 500
0.8 - 2000 2.5 - 2000 2.5 - 500 2.5 - 500 2.5 - 30 0.8 - 2000 0.8 - 2000 0.8 - 2000
Sampling Rate (cm-Vmin)
28.2
Recovery Coefficient
0.99
30.4 28.0 28.1 28.0 40.7 25.6 25.7 23.7
1.00
0.90 I.00 1.00 1.00
(a) Working range values listed are determined at normal relative humidity. Upper limits may be substantially reduced at high relative humidity.
(b) The product of concentration in ppm and exposure time in hours. It shows that a combination of the two factors determines total exposure.
For example, for benzene the minimum detectable exposure may be reached through several combinations including:
0.8 ppm X 1 hour = 0.8 ppm-hours = 0.10 ppm X 8.0 hours
And the upper exposure limit by:
250 ppm X 8 hours = 2000 ppm-hours = 500 ppm X 4 hours
3H 005114
4
II. UNSUITABLE COMPOUNDS
The OVM is not recommended for the compounds listed below because of adverse or inadequate interactions with the sorbent material.
Compound
Carbon Monoxide Ethylene Oxide Formaldehyde Hydrogen Sulfide Isocyanates Methane, Ethane, Propane Methyl Alcohol (Methanol) Methyl Chloride Methyl, Dimethyl, Trimethyl Amines Organic Solids Sulfur Dioxide
These lists are not exhaustive. If you have a specific request not covered in this Guide, please write to Occupational Health and Safety Products Division, 3M Company, 3M Center, St. Paul, MN 55101; or call on 800-328-1300.
( c) III. Calculation Procedure
1) Determine weight of analyte in micrograms (Mg).
2) Establish exposure time in minutes.
3) From Table I, Recommended Compounds, obtain:
a) Sampling Rate (cm^/min.) b) Recovery Coefficient for (*) compounds. c) Procedure for determining Recovery Coefficients
is enclosed.
4) Calculate concentration by substituting values for the terms in the equation below:
mg _
1000 (weight of analyte)
,,3 (Sampling Rate)(Recovery Coefficient)(Exposure Time)
(f\ ^
mine ppm' 'bymultiplying the value obtained above for mg/m'3 as follows:
mmrgr x _______ 2__4_._4__5___________ m-^ (Molecular weight)
(c) See sample calculation on next page. (d) ppm based on 25C, 760 mm Hg.
3M 005115
SAMPLE CALCULATION
Weight of analyte (benzene) determined by gas chromatography:
27.2 micrograms
Exposure time = 7 hours (420 minutes)
To calculate the exposure concentration the following equation is used:
mg _ 1000 (weight of analyte) 1. O
m (Sampling rate)(recovery coefficient)(exposure time)
Weight of analyte
= 27.2 micrograms (yg)
3
Monitor sampling rate
* 33.0 cubic centimeters per minute (cm /min.)
Recovery Coefficient
- 0.99
1000 nanograms (ng)
= 1 microgram (yg)
Substituting the numerical values and units into the equation above,
mg
2.
Since ng/cm3 = mg/m3,
1000 ^ x 27.2 yg 33.0 cm3
min (0.99)(420 min)
=1.98 ng/cm"
^ = 1.98 nr
To determine ppm, the following equation is used:
3.
ppm mg 22.4 1/mole TK
760 mm Hq
nr MW g/mole
273K P mm Hg
Based on 25C, 760 mm Hg the equation reduces to,
4. ppm _ mg_ 24,45 nr MW
Substituting for the molecular weight (M.W.) of benzene, 78.11 and the value
obtained for mg/m .
ppm = 1.98 x 24.45 = 0.62 78.11
Weight of analyte is derived from an equation using nanograms, therefore conversion to micrograms is necessary in equation 2.
3M 005116