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 method | Analytes | Reference value | Shodex 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
|
Operation Manual / Certificate of Analysis
Operation Manuals and Certificate of Analysis / Inspection Certificate for the following products can be downloaded here.