All Internal Standards for ICP-MS produced by CPAchem use high-purity metals or salts in sub-boiling distilled acids. CPAchem's quality system is currently ISO 9001 certified. CPAchem's quality control laboratory is ISO 17025:2005 registered/certified. CPAchem is ISO 17034:2016 registered/certified while demonstrating technical competence in the field of Reference Material Producer.
| 1x | Acetate buffer, pH 3.5, TS | EUR 65.00 |
| 1x | Water, ammonia-free, R | EUR 58.00 |
| 1x | Phosphate Buffer pH 3.5, 0.02 M | EUR 65.00 |
| 1x | Citrate Buffer pH 3.0, 0.25 M | EUR 65.00 |
| 1x | Boric Buffer pH 10.4; Borate Buffer pH 10.4 | EUR 65.00 |
| 1x | Cupric Sulphate Solution pH 5.2, Buffered | EUR 65.00 |
| 1x | Acetate-Edetate Buffer pH 5.5 | EUR 65.00 |
| 7x | Discount for non-paper Certificate of Analysis | EUR -7.00 |