Click here for a list of the concentrations in µg/mL that will be found after the solution is diluted to one liter. The matrix is 10% HNO3 + Tr HF. These products are ideally suited for analysis via ICP-OES, ICP-MS and AAS and were designed to support quality control requirements for the analysis of trace metals as prescribed in the Clean Water Act. This includes EPA methods 200.5, 2..07 and 200.8. These products are certified to ISO 17034 and ISO 17025 and are traceable to the NIST 3100 series SRMs.