Chemical apparatus and process disinfecting – deodorizing – preser – Analyzer – structured indicator – or manipulative laboratory... – Means for analyzing gas sample
Patent
1993-05-14
1996-01-09
Housel, James C.
Chemical apparatus and process disinfecting, deodorizing, preser
Analyzer, structured indicator, or manipulative laboratory...
Means for analyzing gas sample
422 83, 73 2339, 73 2342, 73 3107, 7386321, 436178, 2101983, G01N 122, G01N 704
Patent
active
054826772
ABSTRACT:
A passive dosimeter with a structurally reinforced sorbent wafer is used for monitoring a worker's exposure to ambient aromatics (benzene, toluene, ethylbenzene and xylenes). The wafer is preferably formed by pressing 4 mg of sorbent material between two pieces of 100 mesh stainless steel wire gauze. The thickness of the formed pellet is about 1 mm. The wafer sorbent material design produces a much smaller background noise on gas chromatographic (GC) analysis and enhances the signal-to-noise ratio during the thermal desorption process. This enables the detection of a much lower concentration level of ambient air contaminants than other types of passive dosimeters designed for thermal desorption analysis.
REFERENCES:
patent: 4040805 (1977-08-01), Nelms et al.
patent: 4267023 (1981-05-01), Frant et al.
patent: 4327575 (1982-05-01), Locker
patent: 4350037 (1982-09-01), Higham
patent: 4389372 (1983-06-01), Lalin
patent: 4528160 (1985-07-01), Eckstein et al.
patent: 4636227 (1987-01-01), Yin et al.
patent: 4759210 (1988-07-01), Wohltjem
patent: 4766760 (1988-08-01), Poshemansky et al.
patent: 4772560 (1988-09-01), Attar
patent: 4946649 (1990-08-01), Pannwitz
patent: 5027643 (1991-07-01), Jenkins
patent: 5168068 (1992-12-01), Yanagisawa et al.
Abstract No. 129, Salt Palace Center Abstract Book, May 18-24, 1991.
Macleod, G. and Ames, J. M., "Comparative Assessment of The Artefact Background On Thermal Desorption of TENAX GC and TENAX TA", Journal of Chromatography, 393-398 (1986).
Fields, B., "Diffusive Sampling Onto Solid Adsorbents For The Analysis of Benzene And 1,3-Butadiene In Air By Gas Chromatogrpahy", Diffusive Sampling an Alternative Approach to Workplace Air Monitoring, A. Berlin, R. H. Brown, K. J. Saunders, Eds., Royal Society Chemistry, London (1987) pp. 85-88.
Yin, C. C. and Layton-Matthews, G., "Development Of A Passive Sampler For Monitoring Ambient Levels of Organic Vapours Particularly Benzene" Diffusive Sampling-an Alternative Approach to Workplace Air Monitoring, A. Berlin, R. H. Brown, K. J. Saunders, Eds., Royal Society Chemistry, London (1987) pp. 78-81.
De Bortoli, M., Knoppel, H., Pecchio, E., and Vissers, H., "Performance of A Thermally Desorbable Diffusion Sampler For Personal And Indoor Air Monitoring" Environment International, vol. 15, pp. 427-434, (1989).
Krueger Dennis C.
Yao Chaoliang
Housel James C.
Pyon Harold Y.
Shell Oil Company
LandOfFree
Thermally desorbable passive dosimeter does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Thermally desorbable passive dosimeter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Thermally desorbable passive dosimeter will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1301064