A NEW COMPILATION OFELEMENT CONCENTRATIONS INTHE NATURAL RIVER WATERSTANDARD SLRS-6 (NRC-CNRC)

In Geosciences, there are only few natural river watercertified reference materials to ensure the quality of theroutine consentration's determination. One of thoseCRM is provided by the NRC-CNRC and called SLRS.Actually, the SLRS-6 has been released. However,there is only 19 elements having their concentrationcertified. Those elements are used to validate themeaasurements. Therefore, when a larger investigationis done, which is the case for the laboratories implied inthe CNRS "Isotrace" consortium, it is relativelylimitant.As done for the previous version of the SLRS (4-5) ourconsortium, working on major and trace elements innatural water, studied in details the CRM SLRS-6.They validated the measurement on the 19 certifiedelements and went further by determining other noncertifiedelements based on regular analysis of themusing ICP-MS and ICP-OES.We now offer a compilation of values for about 20trace elements, including Rare Earth Elements, whichare not certified by the producer as well as for silicon.Values are determined using robust mean and theirassociated expanded uncertainties. The Sr isotopic ratiois also proposed.This