Device for chloride ion removal prior to chemical oxygen demand

Details Device for chloride ion removal prior to chemical oxygen demand Device for chloride ion removal prior to chemical oxygen demand

1997-05-30

1999-08-03

Soderquist, Arlen

Chemical apparatus and process disinfecting, deodorizing, preser

Analyzer, structured indicator, or manipulative laboratory...

Means for analyzing liquid or solid sample

422 61, 422101, 422 59, 436 62, 436145, 436146, 436175, G01N 3318

Patent

active

059321741

ABSTRACT:
A method of pretreating aqueous chemical oxygen demand (COD) samples to remove the risk of potential chloride ion interference. The method comprises acidifying an aqueous COD test sample, and thereafter passing the acidified sample through a source of pentavalent bismuth (Bi.sup.5+) such as sodium bismuthate.

REFERENCES:
patent: 956332 (1910-04-01), Fuller
patent: 3337451 (1967-08-01), Calman
patent: 3346617 (1967-10-01), Hiroki et al.
patent: 3387038 (1968-06-01), Koch
patent: 3583230 (1971-06-01), Patterson
patent: 3608736 (1971-09-01), Wong
patent: 3763879 (1973-10-01), Jaworek
patent: 3787334 (1974-01-01), Yamada
patent: 4131526 (1978-12-01), Moeglich
patent: 4234317 (1980-11-01), Lucas et al.
patent: 4241216 (1980-12-01), Bergman et al.
patent: 4425438 (1984-01-01), Bauman et al.
patent: 4447405 (1984-05-01), Ahn et al.
patent: 4485015 (1984-11-01), Smith
patent: 4683058 (1987-07-01), Lyman et al.
patent: 4787971 (1988-11-01), Donald
patent: 4832842 (1989-05-01), Limb
patent: 4859336 (1989-08-01), Savas et al.
patent: 4863610 (1989-09-01), Campbell
patent: 4956298 (1990-09-01), Diekmann
patent: 5055409 (1991-10-01), Astrom
patent: 5076922 (1991-12-01), Deare
patent: 5104529 (1992-04-01), Becker
patent: 5145789 (1992-09-01), Corti et al.
patent: 5167818 (1992-12-01), Iana et al.
patent: 5186830 (1993-02-01), Rait
patent: 5219529 (1993-06-01), Ngo et al.
patent: 5264184 (1993-11-01), Aysta et al.
patent: 5304305 (1994-04-01), Lehrer
patent: 5368729 (1994-11-01), Stefkovich et al.
patent: 5411661 (1995-05-01), Heiligman
patent: 5439593 (1995-08-01), Price
patent: 5552325 (1996-09-01), Nochumson et al.
patent: 5667754 (1997-09-01), Brayton et al.
Begemann et al., Bi-.sub.4 O.sub.7, Das Erste Definierte Binare Bismut(III,V)-Oxid, Jul., 1989, pp. 123-127.
M.H. Ford-Smith et al., Kinetics of Oxidation-Reduction Reactions Between Elements of Groups V and VII. Part I. Bismuth(v) . . . , 1973, pp. 461-464, J.C.S. Dalton.
Habib Firouzabadi et al., Zinc Bismuthate Zn(BiO.sub.3).sub.2 I.A. Useful Oxidizing Agent for the Efficient Oxidation . . . , Apr. 1992, pp. 1131-1134, The Chemical Society of Japan.
Membrane Filtration--Chromatography Catalog, Amicon, Inc., Publication No. 387, 1995, Amicon, Inc.
V.S. Rogov et al., Chemical Abstr., 1984, 100, 167338m.
F.P. Treadwell, et al., "Analytical Chemistry", Ed. 1930, John Wiley & Sons, Inc., NY pp. 222-227.
W. Rigby, J. Chem. Soc., 1950, 1907-1913.
V.S. Rogov, Razved, Okhr. Nedr. 1984, 58-59.
M. Namiki et al. Fresenius J. Anal. Chem., 1992, 344, 265-268.

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