de
x
vol
air
mw
mL
1
46
.
24
mL
g
μ
X
ppm
×
×
×
=
Where X Φg/mL = Concentration of samples
24.45
= Molar volume (liter/mole) at 25 °C and 760 mmHg
mw
= Molecular weight = 120.15
1 mL
= Desorption
volume
air vol
= Sample air volume taken (L)
de
= Desorption efficiency
3.7.2 This calculation is done for each section of the sampling
tube and the results added
together. Perform blank corrections when the analyte is detected in blank samples.
3.8 Safety precautions
3.8.1 All handling of solvents should be done in a hood.
3.8.2 Avoid skin contact with all solvents. Use appropriate disposable gloves.
7 of 8
3.8.3 Wear safety glasses at all times.
4 Recommendations for further study
4.1 Further work should be done on breakthrough.
4.2 Longer storage tests should be performed.
Figure 1. Calibration Curve for determining sample concentration
Figure 2. Chromatogram
8 of 8
Figure 3. Bulk sample analysis by GC/FID
A bulk sample was analyzed by gas chromatography on a Varian 3400 with a flame ionization detector. The
analysis was for % methyl carbitol, benzaldehyde, phenol, and acetophenone, with methanol as the solvent.
The column used was a 60 meter, DB-1 capillary column, Temperature = 80 °C for 2 minutes, then increased
at 5°/minute to 180 °C. (See Figure 3)
5 References
5.1 "The Condensed Chemical Dictionary", 10th ed.; Hawley, Ed.; Van Norstrand Reinhold Company,
New York, 1981; p. 9.
5.2 "The Merck Index", 9th ed.; Windholz, Martha, Ed.; Merck and Company, Inc., New Jersey, 1976;
p. 9.
5.3 "Spice Mill"; Katz, A.E.; 69, 1946; p. 46.
5.4 "Journal of Industrial Hygiene Toxicology"; Smyth, H.F. Jr., and Carpenter, C.P.; 30, 1948; p. 63.