Isothiazolone monitoring in aqueous systems

Details Isothiazolone monitoring in aqueous systems Isothiazolone monitoring in aqueous systems

2007-07-03

2007-07-03

Warden, Jill (Department: 1743)

Chemistry: analytical and immunological testing

Heterocyclic carbon compound

Diverse hetero atoms in same or different rings

C436S174000, C436S175000, C436S177000, C436S178000

Reexamination Certificate

active

10158910

ABSTRACT:
A method for measuring the concentration of isothiazolones in aqueous systems including removing sample interferences by lowering the pH of a sample collected from the aqueous system containing isothiazolones and filtering the sample, removing additional interferences by raising the pH and subsequent filtering, selectively adsorbing the isothiazolones in the sample desorbing the isothiazolones from the adsorbent, and comparing the absorbance of ultra-violet light of the desorbed sample to a standard of known concentration.

REFERENCES:
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patent: 4110378 (1978-08-01), Geyer
patent: 4652530 (1987-03-01), Rothman et al.
patent: 4787972 (1988-11-01), Stubblebine
patent: 5094957 (1992-03-01), Willingham
patent: 6375856 (2002-04-01), Seshimoto et al.
patent: 6541228 (2003-04-01), Genders et al.

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