Method for trace water analysis in cyclic siloxanes useful...

Details Method for trace water analysis in cyclic siloxanes useful... Method for trace water analysis in cyclic siloxanes useful...

2007-03-13

2007-03-13

Warden, Jill (Department: 1743)

Chemistry: analytical and immunological testing

Determination of water

C436S072000, C436S124000, C436S125000, C436S127000, C436S128000

Reexamination Certificate

active

10107885

ABSTRACT:
An analytical technique for the accurate and precise measurement of trace water in chemical reagents, comprising the steps of combining a chemical reagent comprising ≦5 ppm water, with hexafluoroacetone (HFA), to form a sample mixture comprising at least the chemical reagent and a water derivative of hexafluoroacetone; and measuring the concentration of the water derivative of hexafluoroacetone by gas chromatography.

REFERENCES:
patent: 4257775 (1981-03-01), Ladov et al.
patent: 6368359 (2002-04-01), Perry et al.
patent: 6383955 (2002-05-01), Matsuki et al.
patent: 6410463 (2002-06-01), Matsuki
J. Electroanal. Chem. “Determination of Trace Water in Propylene Carbonate Using Hexafluoroacetone” Hanson et al. Apr. 1987.
U.S. Appl. No. 10/015,326, filed Dec. 31, 2001, Chongying Xu et al.

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