For the separation and quantification of charged analytes in aqueous samples ion‑chromatography (IC) is the technique of choice. Normally used to determine ions at sub parts per million (ppm) levels, some modern IC instruments can detect down to the parts per trillion (ppt) range.
ROMIL PrimAg® single ion reference solutions for IC are available as both ready‑to‑use calibration solutions and concentrates. Featuring ISO 17034 accreditation the matrices are matched to IC, targeting water for anions and very dilute nitric acid for cations.
A further advantage of IC is that the technique can detect multiple ions in a single run. Of course, multi‑ion reference solutions may be made up by the analyst from single component solutions.
However, the modern trend is to buy in multi‑ion reference solutions, saving valuable analytical skills for performing the actual analysis. These solutions are available either as stock catalogue products or as custom mixes. Both are available as ROMIL PrimAg® multi‑ion solutions; if a suitable stock item is not found then we welcome your enquiry for a mix for your specific application. (Indeed, many of our stock items began life as a custom mix).
In sample preparation for IC, ROMIL high purity acids are the perfect accessories. For determinations down to ppb levels the ROMIL‑SpA™ super purity range is the ideal match.
For IC instruments that can detect down to parts per trillion we recommend our ultra purity line, ROMIL‑UpA™, which features residual cations at impressive ppt levels. Just like a leaf in a forest!
PrimAg is a registered trademark of ROMIL Ltd.