DHI has produced and certified two new VKI Reference Materials for Quality Control in environmental laboratories. The VKI Reference Materials contain certified amounts of compounds the laboratories measure in ordinary samples, and are used by the laboratories to monitor and document their analytical performance. DHI produces a range of different materials, certified for their content of metals, nutrients, organic compounds, major ions and other parameters. The two new materials are QC LL3A, which contains 0.5 µg/L mercury (Hg) in water and QC WW6, containing 240 mg/L of suspended solids in wastewater. Both materials are supported by certificates, giving information such as the certified concentration, with a confidence interval.
For more information on available materials, matrices and parameters, see www.refmat.dhi.dk