Chemistry: physical processes – Physical processes – Crystallization
Patent
1978-08-28
1980-10-14
Turk, Arnold
Chemistry: physical processes
Physical processes
Crystallization
23230R, 204 1T, 422 80, G01N 3112, G01N 3116, G01N 3318
Patent
active
042278872
ABSTRACT:
A three phase process for determining total organic halides in water. The first phase is a sorptive process including passing a liquid through a packed bed of sorptive material thereby removing quantitatively, purgeable and non-purgeable, organic halides and thereafter passing an inorganic halide displacement wash solution through the bed to displace inorganic halides. The second and third phases are a combination combustion and titration whereby organic bromides and other organic halides entering the combustion phase are quantitatively titrated coulometrically. The second and third phases include in a first heating zone heating a sample, such as the sorptive material following the first phase, in the presence of a mild oxidant to a temperature sufficient to vaporize water; in a second heating zone heating any remaining sample from the first heating zone and gases therefrom in the presence of an oxidant to a temperature sufficient to complete combustion of the sample and gases; and concurrently titrating coulometrically the gases from the second heating zone.
REFERENCES:
patent: 3544277 (1970-12-01), Lysyj et al.
patent: 3703355 (1972-11-01), Takahasi et al.
patent: 3716334 (1973-02-01), Pont
patent: 3853474 (1974-12-01), Austin
Cedergrin, "A Modified Oxidative Microcoulometric Method for Determination of Sulfur in Hydrocarbons Containing Large Amounts of Chlorine", Talanta, vol. 24, Pergamon Press (1977 pp. 21-24.
R. C. Dressman, "An Evaluation of the Determination of Total Organic Chlorine (TOCl) in Water by Adsorption onto Ground Activated Carbon, Pyrohydrolysis, and Chloride-Ion Measurement", paper presented at Water Quality Technology Conference at Kansas City, Missouri, Dec. 5-6, 1977.
R. C. Dressman. "Procedure for the Application of the CAOX as Cl.sup.- Method to Disinfected Water," addendum to R above), Water Supply Research Division, U.S. Environmental Protection Agency, Jun. 1, 1978.
D. H. Glaze et al., "Total Organic Halogen as Water Quality Parameter: Adsorption/Microcoulometric Method", Environmental Science & Technology, vol. 11, No. 7, Jul. 1977.
Kuhn et al., "Einige Untersuchungen zur Bestimmung von organischen Chlorverbindungen auf Aktivkohlen" (Several Investigations on Activated Charcoal for the Determination of Organic Chloro-Compounds), Vom Wasser, vol. 41 (1973), pp. 65-79, (English copy from the EPA.)
Joyce Robert J.
Moore Robert T.
Takahashi Yoshihiro
Bernheim William S.
Envirotech Corporation
Morrissey John J.
Turk Arnold
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