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Regulation for Water Supply

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Under the current drinking water quality standards, standard values are set for 51 items (Enacted on April 1, 2015 by Ministry of Health, Labour and Welfare, Japan). The table shows the Shodex column suitable for analyzing each anion.

 

SubstanceQuality standardMeasurementRecommended column
Nitrate and
Nitrite
10mg/L
Ion chromatography
(Non-suppressor method)
IC I-524A, IC NI-442
(Suppressor method)
IC SI series
Fluoride
0.8mg/L
Ion chromatography
(Non-suppressor method)
IC I-524A, IC NI-442
(Suppressor method)
IC SI series
Chroride
200mg/L
Ion chromatography
(Non-suppressor method)
IC I-524A, IC NI-442
(Suppressor method)
IC SI series
Bromate
0.01mg/L
Ion chromatography with post column-absorption photometry
IC SI series
Liquid chromatography - mass spectrometry
RSpak JJ-50 2D
Cyanide and
Cyanogen chloride
0.01mg/L
Ion chromatography with post column-absorption photometry
RSpak KC-811 6E
Chlorate
0.6mg/L
Ion chromatography
(Suppressor method)
IC SI-52 4E, SI-35 4D
Nitrite
0.04mg/L
Ion chromatography
IC SI-52 4E

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