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Analysis of Anions According to the Water Quality Standards in Japanese Water Supply Act

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In Japan, Ministry of Health, Labor and Welfare Ordinance No. 101 (May 30, 2003) "Ministerial Ordinance on Water Quality Standards" defined 50 items as water quality standards, and from April 1, 2014, nitrite was added to the standard list.

Specific analysis methods are stated in the "Minister of Health, Labor and Welfare based on the provisions of the Ministerial Ordinance on Water Quality Standards" published in July, 2003.


Below is the list of Shodex anion columns suitable for the analysis of anions mentioned in the ordinance.

Analysis methodAnalytesReference valueShodex column
(Appended Table No.12)
Ion chromatography
-post column adsorption photometry
Cyanide ion
Cyanogens chloride
≤ 0.01 mg/L
amount of cyan
RSpak KC-811 6E
(Appended Table No.13)
Ion chromatography (anion)
Simultaneous analysis method
Nitrite nitrogen ≤ 0.04 mg/L
IC SI-52 4E
IC SI-35 4D
Nitrate
Nitrite
≤ 10 mg/L
Fluoride ≤ 0.8 mg/L
Chlorate ≤ 0.6 mg/L
Chloride ion ≤ 200 mg/L
(Appended Table No.18)
Ion chromatography
-post column adsorption photometry
Bromate ≤ 0.01 mg/L
IC SI-50 4E
IC SI-52 4E
(Appended Table No.18-2)
LC-MS method
Chlorate
Bromate
≤ 0.6 mg/L
≤ 0.01 mg/L
RSpak JJ-50 2D

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