LGC has developed a certified reference material (CRM) for the determination of metals in hard drinking water.
Produced under the organisation's accreditation to ISO Guide 34 for the production of reference materials, the CRM (Hard Drinking Water for Metals, ERM-CA011b) is a replacement for LGC's current CRM for hard drinking water (ERM-CA011a) and is certified for new elements, including beryllium, cobalt, molybdenum, strontium and vanadium.
The source material was a natural hard drinking water from Tamworth, Staffordshire, to which solutions of metals were added to achieve concentrations close to those described in the current European Union and UK drinking water legislation (98/83/EC), which sets the quality standards for drinking water in terms of microbiological, chemical and organoleptic parameters to ensure water is wholesome and clean.
Using high-accuracy isotope dilution mass spectrometry (IDMS) measurements, LGC certified the reference material for lead and selenium.
An inter-laboratory study enabled the certification of the material for other elements including aluminium, antimony, arsenic, barium, beryllium, boron, cadmium, calcium, chromium, cobalt, copper, iron, lead, magnesium, manganese, molybdenum, nickel, potassium, selenium, sodium, strontium, vanadium and zinc.
The study involved 29 participant laboratories from eight different countries.
The determination of metals in drinking water is imperative for ensuring public health and safety.
The development and use of certified reference materials that are close in matrix composition to test samples, supports the validation of water monitoring procedures, providing confidence in the quality of the results obtained.
