JCSS pH Standard Solution
pH is a unit necessary to know the degree of acidity and alkalinity of a solution. It represents the hydrogen ion activity in the solution. Because the hydrogen ion activity in the solution cannot be directly measured, the pH is measured by comparing with the pH of one aqueous solution. Therefore, clear pH definitions and standards are important, so the ISO (International Organization for Standardization) and the JIS (Japanese Industrial Standards) specify the measurement method for pH 1).
JCSS (Japan Calibration Service System) is a traceability system based on the Measurement Law of Japan. It is developed from time to time and used as a reference material for various official methods in Japan. JCSS reference materials are SI traceable CRM (certified reference materials) that ensure traceability to specific reference materials, manufactured by CERI (Chemicals Evaluation and Research Institute, Japan), a designated calibration institute under the Measurement Law of Japan. JCSS standard solutions are accompanied by a calibration certificate bearing the IAJapan and MRA (Mutual Recognition Agreement) symbols, and the concentrations on the calibration certificate are accepted internationally through the MRA of ILAC/APAC.
- Ohata, M. et al.: AIST Bulletin of Metrology, 3-4, 657 (2005).
Composition
| Code | Product Name | Composition | pH |
|---|---|---|---|
| 151-01845 | Oxalate pH Standard Solution | KH3(C2O4)2・2H2O in H2O | 1.68 |
| 166-12141 | Phthalate pH Standard Solution | C6H4(COOK)(COOH) in H2O | 4.01 |
| 163-12151 | Phosphate pH Standard Equimolal Solution | KH2PO4 - Na2HPO4 in H2O | 6.86 |
| 166-17445 | Phosphate pH Standard Solution | KH2PO4 - Na2HPO4 in H2O | 7.41 |
| 203-08771 | Tetraborate pH Standard Solution | Na2B4O7 in H2O | 9.18 |
| 037-16145 | Carbonate pH Standard Solution | NaHCO3 - Na2CO3 in H2O | 10.01 |
JCSS
JCSS (Japan Calibration Service System) is a traceability system based on the Measurement Law of Japan. It is developed from time to time and used as a reference material for various official methods in Japan. JCSS reference materials are SI traceable CRM (certified reference materials) that ensure traceability to specific reference materials, manufactured by CERI (Chemicals Evaluation and Research Institute, Japan), a designated calibration institute under the Measurement Law of Japan. JCSS standard solutions are accompanied by a calibration certificate bearing the IAJapan and MRA (Mutual Recognition Agreement) symbols, and the concentrations on the calibration certificate are accepted internationally through the MRA of ILAC/APAC. Fujifilm Wako provides JCSS reference materials such as inorganic standard solutions (ion/metal standard solutions), organic standard solutions, and pH standard solutions.
JCSS calibration certificate
Features
- CRM with guaranteed SI traceable characteristic values (concentration, factor, etc.)
- By valuing our products using specific reference materials and conducting concentration reliability tests on the valued products at CERI, we maintain the high reliability of the value.
- The calibration certificate bears the IAJapan and JCSS symbols, indicating that it meets all the requirements for CRM under ISO 17034.
- The calibration certificate bears the MRA symbol, which indicates that the listed characteristic values are internationally acceptable.
Traceability of JCSS
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