Document 8RKrwQDwwb5zdB59bzEaeqpNe
II. #3500 LABORATORY EVALUATION
B. Toluene and mixture of Toluene, isobutyl Alcohol, Acetone, and Perchloroethylene.
The.Technical Research Center of Finland ran controlled laboratory comparisons of the #3500 vs. standard charcoal tubes and calibrated, low flow pumps. The compounds studied were Toluene, a mixture of Toluene and Iso Butyl Alcohol, Acetone, and Perchloroethylene. Chamber concentrations were checked by Miran IA infrared and by direct GC analysis.
Agreement with the reference methods are excellent except in the case where exposure time was less than the recommended fifteen minutes or deliberate overload conditions were chosen. In Over load conditions, the 3500 more closely estimated the concentration than the tube.
TOLUENE TECH. RESEARCH CENTER OF FINLAND SAMPLE TIME - 4 hrs. RESULTS - PPM
MIRAN, IA GC
3500 #1 #2 *3 #4 #5 #6 #7 #8
TUBE #1 TUBE #2
TEST *1
288 289
297 287
-
-
283
-
TEST # 2
89 86
86 87 87 85 88 88 87 89
85 85
3M 107414
TOLUENE TECH RESEARCH CENTER OF FINLAND RESULTS - PPM
SHORT TERM SAMPLING
Sample Time (min.)
Test #1 20
Test #2 15
Test #3 10
Miran, IA GC
3500 #1 //3500 // 2
560 560 560 544 544 544 550 600 503 54 2 530 529
MIXTURE TEST TECHNICAL RESEARCH CENTER OF FINLAND MONITOR - 3M #3500 RESULTS - PPM
SAMPLE TIME: TUBES 1 & 2 - 66 min. TUBES 3 & 4 - 30 min. #3500 - 220 min.
Miran, IA G. C.
Tube 1 Tube 2 Tube 3 Tube 4
#3500 1 2 3 4 5 6
Tube #3500
ISO BUTYL ALCOHOL
144 143
150 138 138 130
138 148 144 142 146 144
139 + 8.2 144 + 3.5
TOLUENE
180 175
164 168 169 169
166 178 176 165 180 170
168 +2.4 173 + 6.4
3M 107415
acetone
TECH RESEARCH CENTER OF FINLAND RESULTS - PPM
Test #1
Sample time ( min.)
Miran,IA GC #1 GC #2
#3500 #1 #3500 #2
65
1070 1066
-
1043 1063
Tube #1 Tube #2
-
* Deliberate Overload Condition
Test #2*
240
1555 1538 1560
1338 1210
1018 1007
Test #3
240
385 380
-
373 400
377 400
PERCHLOROETHYLENE TECH RESEARCH CENTER OF FINLAND SAMPLE TIME - 4 hrs. RESULTS - PPM
TEST #1
Miran,IA GC #1 GC #2
120 121 125
#3500 #1 #3500 #2
124 121
Tube
122
TEST #2
42 40 42
41 42
-
3M 107416
I. LABORATORY EVALUATION C)t. Stability of Samples using Dichloromethane, 1, 2 ' Dichloroethane, Tetrachloroethylene, Heptane.
The following data shows that the #3500 is gas tight. The data relate storage time to recovery coefficients (Desorption Efficiency). This data are valid only when the compound is stable. Recovery Coefficients may drop due to decomposition, polymer ization, etc. over extended storage time. Methyl Ethyl Ketone is an example of decaying recoveries over time. Reliability of samples are not assured if the captured volatile compound can escape during storage.
3M 107418
I. #3500 LABORATORY EVALUATION
. Enflurane
A study at an eastern U.S. university was carried out comparing the #3500 Miran 1A and Charcoal Tube (C.T.) to a known concentration in an exposure chamber. The Miran sampled continuously with readings taken at fifteen minute intervals. Velocity scans were taken along with pressure and temperature to insure uniformity of exposure conditions.
The #3500 correlated well with the tank concentration and had excellent coefficient of variance. The regression slope of #3500 versus tank concentration was 0.95.
ENFLURANCE LABORATORY STUDY
CORRELATION COEFFICIENTS
LINEAR REGRESSION 3500 - Tank
3500 - c. T.
3500 - Miran
0.960 0.970 0.963
LINEAR REGRESSION (FIT THROUGH ZERO)
3500 - Tank
0.990
3500 - C. T.
0.993
3500 - Miran
0.990
COEFFICIENTS OF VARIATION
TANK CONC. (PPM)
3500
MIRAN
5
0.08
0.10
10
0.06
0.07
20
0.16
0.03
C.T.
0.11 0.27 0.25
3M 107419
enflurane LAB STUDY RESULTS - PPM
TANK 5
10
20
3500 5.6 4.8 4.6 4.6 4.6 4.6
9.2 9.7 8.2 9.2 9.7 9.7
19.4 19.4 18.1 17.6 19.1 27.5 19.1 19.4
C.T. 5.2 5.2 4.6 4.6 5.0 5.0
10.4 10.4
8.5 8.5 8.9 8.9
19.7 19.7 19.3 19.3 20.9 20.9 19.2 19.2
MIRAN 4.4 4.4 4.2 4.2 4.2 4.2
8.8 8.8 7.8 7.8 8.0 8.0
15.9 15.9 15.3 15.3 15.9 15.9 15.9 15.9
1 I |
j |
1
|
3M 107420
II. FIELD EVALUATION A. Complex Mixtures
A U.S. chemical company ran a field comparison between a 600 mg. charcoal tube and the #3500 in a complex mixture. Agreement is good for all cases except acetone, where it appears the #3500 samples are high.
In fact, the #3500 is more closely estimating the true valve. In these conditions, it is believed that acetone is subject to displacement and is more readily swept from the tube. A diffusional system has no flow of air, only organic vapor, and suffers less from displacement losses.
MIXTURES SAMPLE TIME: 6 hrs. RESULTS - PPM TUBE - 600 mg.
MIBK TOLUENE N-BUTYL ACETATE XYLENE MEK ACETONE
METHYLEDE CHLORIDE TRICHLOROETHYLENE PERCHLOROETHYLENE ACETONE
METHYLENE CHLORIDE TRICHLOROETHYLENE PERCHLOROETHYENE ACETONE
#3500
8.5 16.5
2.3 0.4
ND 264
0.5 0.6 0.5 66.7
11.3 0.1 0.6
35.4
Pump & Tube
4.6 13.8
2.5 0.3
ND 115
0.3 0.4 0.3 45.2
9.2 0.1 0.4 17.0
3M 107421
II. FIELD'EVALUATION D. 1,1,2-Trichloroethylene
3M Company Industrial Hygiene ran comparison personal samples in a 3M plant. Samples were run for four hours and converted to TLV-TWA. Correlation was good between the two methods.
1,1,2 TRICHLOROETHYLENE 3M PLANT SAMPLE TIME: 4 hrs. RESULTS - PPM CORRELATION COEFFICIENT = 0.991
#3500
0.8 0.7 7.3 5.1 4.2 2.2 4.0 3.4 1.0 1.4 9.8 7.6 0.4 3.0 1.6 3.1
PUMP & TUBE
0.8 0.6 8.5 5.9 3.9 2.0 4.6 4.9 0.9 1.1 11.9 9.6 0.2 3.4 1.8 2.8
3M 107424