Sulfuryl fluoride fumigation process

Details Sulfuryl fluoride fumigation process Sulfuryl fluoride fumigation process

2002-05-31

2008-05-06

Gakh, Yelena G. (Department: 1797)

Chemistry: analytical and immunological testing

Sulfur containing

Organic or sulfhydryl containing

C436S119000, C436S147000, C073S025040, C073S025030, C073S029010, C422S083000

Reexamination Certificate

active

07368291

ABSTRACT:
A process is provided for determining the amount of sulfuryl fluoride in the atmosphere of an enclosed area that has been fumigated with sulfuryl fluoride (SO2F2). This process comprises: (A) sampling said atmosphere of said enclosed area to obtain a gaseous sample; (B) selectively removing water from said gaseous sample by passing said gaseous sample through a perevaporation zone to obtain a perevaporated sample, wherein said perevaporation zone comprises a copolymer of tetrafluoroethylene and perfluoro-3,6-dioxa-4-methyl-7-octene-sulfonic acid; and (C) analyzing said perevaporated sample in a sulfuryl fluoride detector to determine the amount of sulfuryl fluoride in said perevaporated sample.

REFERENCES:
patent: 4950464 (1990-08-01), Fujioka et al.
patent: 5824919 (1998-10-01), Hansen
patent: 5996397 (1999-12-01), Mettes
Fumiscope Version 5.0 Operating instructions (Oct. 2001); http://www.fumiscope.com/manual.htm.
Cerification Training Manual for the Structural Pesticide Applicator (CTMSPA), published around 1975, pp. 123-140.
Ping et al. “Concentration of inorganic acids by pervaporation”, Recent Progress en Genie des Procedes, 1992, 6 (21), pp. 325-329, Abstract.
PCT/US02/17002; Written opinion; Mar. 24, 2003.
Miyoshi, et al., “Pervaporation of Water-Carboyxlic Acid Solution with Ion Exchange Membranes”, Maku, 1988, v. 13, No. 2, pp. 109-115.

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