Title:
METHOD FOR QUANTIFICATION OF TOTAL PHOSPHOROUS
Document Type and Number:
WIPO Patent Application WO/2012/011422
Kind Code:
A1
Abstract:
The purpose is to quantify the total phosphorous in water of interest safely and within a short time. Provided is a method for quantifying the total phosphorus in water of interest by decomposing phosphorous compounds contained in the water to convert the phosphorous compounds into phosphate ions and determining the quantity of the phosphate ions in the water, wherein an alkali metal salt of peroxydisulfuric acid and sulfuric acid are added to the water and the resulting mixture is heated at a temperature ranging from 65˚C to a boiling point for a predetermined period. Subsequently, a color-developing agent comprising at least one hydroxy-group-containing compound selected from a group of hydroxy-group-containing compounds consisting of hydroxycarboxylic acids and alditols, a saccharide compound selected from a group of saccharide compounds consisting of aldoses having 5 carbon atoms, aldoses having 6 carbon atoms, ketoses having 6 carbon atoms and monosaccharide-generating compounds capable of being decomposed to generate any one of the aforementioned monosaccharides and hexaammonium heptamolybdate is added to the water, the resulting mixture is heated at 65˚C or higher for a predetermined period, and the absorbance of any wavelength ranging from 600 to 950 nm in the water is measured.
Inventors:
ISHII, Hiroshi (8-4-1, Habikigaoka Habikino-shi Osaka, 64, 〒5830864, JP)
Application Number:
JP2011/066032
Publication Date:
January 26, 2012
Filing Date:
July 14, 2011
Export Citation:
Assignee:
MIURA CO., LTD. (7 Horie-cho, Matsuyama-shi Ehime, 96, 〒7992696, JP)
三浦工業株式会社 (〒96 愛媛県松山市堀江町７番地 Ehime, 〒7992696, JP)
三浦工業株式会社 (〒96 愛媛県松山市堀江町７番地 Ehime, 〒7992696, JP)
International Classes:
G01N31/00; G01N21/78
Claims: