From sea salt to seawater: a novel approach for the production of water CRMs.

ABSTRACT: Natural water certified reference materials (CRMs) are mostly available in a liquid form, and they are produced starting from suitable environmental samples. Many precautions are usually needed to avoid biological or physical degradation, including filtration, acidification, and sterilization. In this study, the drawbacks associated with liquid-based seawater CRMs were tackled by developing a salt-based seawater proxy for nutrients that could be reconstituted in water solution just before use. Phosphate, silicate, and nitrate were chosen as target analytes. Sea salt mimicking the composition of seawater was spiked with an aqueous solution of the analytes and homogenized using a high-energy planetary ball mill (u_hom < 1.2%). The salt powder CRM SALT-1 ( https://doi.org/10.4224/cr

SUBMITTER: Pagliano E 

PROVIDER: S-EPMC9174130 | biostudies-literature | 2022 Jul

REPOSITORIES: biostudies-literature