Title:
METHOD FOR QUANTITATIVELY DETERMINING SELENIUM ACCORDING TO CHEMICAL FORM
Document Type and Number:
Japanese Patent JP2014196977
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a selenium quantitative determination method according to a chemical form capable of further accurately and quantitatively determining Se(VI) by separating, from Se(VI), a selenium with a valence of less than 4 that has been conventionally determined as Se(VI).SOLUTION: The method for quantitatively determining selenium according to a chemical form includes: a first step of calculating a concentration of Se(IV) contained in a sample; a second step of, for the sample, additionally changing all selenium contained in the sample to Se(IV) and calculating a total concentration of all the selenium; a third step of, for the sample, additionally oxidizing the selenium under such conditions as oxidizing the selenium with a valence of less than 4 to Se(IV) but not oxidizing Se(IV) to Se(VI) so as to calculate the total concentration of the selenium with the valence of less than 4; and a fourth step of calculating the concentration of Se(VI) from a difference between the total selenium concentration calculated in the second step and the total concentration of the selenium with the valence of less than 4 calculated in the third step.
Inventors:
AKIYASU HIROYUKI
AIZAWA TSUNETO
AIZAWA TSUNETO
Application Number:
JP2013073334A
Publication Date:
October 16, 2014
Filing Date:
March 29, 2013
Export Citation:
Assignee:
CENTRAL RES INST ELECT
DENRYOKU TECHNO SYSTEMS KK
DENRYOKU TECHNO SYSTEMS KK
International Classes:
G01N31/00; G01N21/31; G01N21/73
Domestic Patent References:
| JP2006337036A | 2006-12-14 | |||
| JP2001520119A | 2001-10-30 | |||
| JPH0975954A | 1997-03-25 | |||
| JP2004020324A | 2004-01-22 |
Foreign References:
| US5071568A | 1991-12-10 |
Attorney, Agent or Firm:
Hiroyuki Kurihara
Katsutoshi Muranaka
Katsutoshi Muranaka