Manganese III method for chemical oxygen demand analysis

Details Manganese III method for chemical oxygen demand analysis Manganese III method for chemical oxygen demand analysis

1995-06-07

1996-09-17

Soderquist, Arlen

Chemistry: analytical and immunological testing

Oxygen demand

436164, 436166, 422 61, 422 79, G01N 3318

Patent

active

055567878

ABSTRACT:
A method of analyzing aqueous samples for Chemical Oxygen Demand (COD) which involves using an analysis reagent comprised of a mixture of stabilized Manganese III ion and an inorganic non-oxidizing acid such as sulfuric or phosphoric acid. Manganese III ion (or manganosulfuric acid complex) is purple, and, as it is reduced to Manganese II ion, the purple color decreases to colorless. Manganese III Chemical Oxygen Demand test is preferred over the presently available chromium reagent test because Chromium VI ion is a known carcinogen, the reagent is photosensitive and a silver catalyst is required. Manganese III is not carcinogenic or photosensitive and does not require a silver catalyst.

REFERENCES:
patent: 2462050 (1949-02-01), Zimmerman
patent: 3540845 (1970-11-01), Overbeck et al.
patent: 3558277 (1971-01-01), Laman et al.
patent: 4394184 (1983-07-01), Adams
patent: 4430243 (1984-02-01), Bragg
patent: 4728455 (1988-03-01), Rerek
patent: 4749552 (1988-06-01), Sakisako et al.
patent: 4942133 (1990-07-01), Pauly et al.
patent: 5001070 (1991-03-01), Ivaska et al.
patent: 5114606 (1992-05-01), Van Vliet et al.
patent: 5246621 (1993-09-01), Favre et al.
Barek, et al., Chemia Analityczna,20,749(1975).
Suwyn, et al., Inorganic Chemistry, vol.6, No.1, Jan. 1967.
Stone, et al., Environ. Sci. Technol., 18,450-456 (1984).
Selim, et al., Anal. Chim. Acta, vol. 21 (1959), 536-544.
Gibbs, "Introduction to Chemical Oxygen Demand, Technical Information Series-Booklett No. 8", Hach Technical Center, copyright 1979, 1985, 1990, 1992, 1993.
Hach Water Analysis Handbook, 2nd Edition, pp. 475-506 (1992).
Gorbachev, et al., "Production of Trivalent Managanese", Zhurnal Obshchei Khimii, vol. 10, No. 22, pp. 1961-1967 (1940).
Sem, "Electrooxidation of Managanous Salts and Some Compounds Obtained Thereby" Zeitschrift F ur Electrochemie, vol. 21, No. 17/18, pp. 426-437 (1915).
Brochure-Hach Cod System for Wastewater Testing, copyright 1990, 1992, 1993, Bulletin No. 4187.
A. R. J. P. Ubbelohde J. Chem. Soc. 1935, 1605-1607.
R. Belcher et al. Anal. Chim. Acta. 1952, 6, 322-332.
W. A. Waters Quart. Rev 1958, 277-300.
M. Ajmal et al. Chem. Abstr. 1964, 60, 3e.
T. J. Kemp et al. J. Chem. Soc. 1964, 339-347.
N. Hlasivcova et al. Collect, Czech. Chem. Commun. 1969, 34, 3995-4000.
A. M. Jirlca et al. Anal. Chem.1975, 47, 1397-1402.
M. S. Nasr et al. Chem Abstr, 1975, 83, 102 855p.
J. Barek et al. Collect. Czech. Chem. Commun, 1978, 43, 2555-2564.
R. R. Himebaugh et al. Anal. Chem. 1979, 51, 1085-1087.
A. T. Kuhn et al J. Chem. Soc., Faraday Trans. 1 1983, 79, 417-430.
M. S. Ramachandran et al. Chem. Abstr. 1984, 101, 98486g.
R. C. Schothorst et al. Anal. Chim. Acta. 1986, 179, 299-305.
M. A. Malati et al. Analyst 1987, 112, 511-513.
I. Pinto et al. Analyst. 1991, 116, 285-289.

Affiliated with

Also associated with

Rating

Manganese III method for chemical oxygen demand analysis does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Manganese III method for chemical oxygen demand analysis, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Manganese III method for chemical oxygen demand analysis will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-412676