Solution B of ICP-MS-MCS. 100 mL. Contains:(µg/mL) Arsenic, Barium, Cadmium, Cobalt, Copper, Lead, Molybdenum, Selenium, Silver, Thallium at 20, Calcium, Iron, Phosphorus, Potassium at 1,000 in 2% HNO3 + Trace HF. 12 months expiry date. Traceable to NIST 31XX series. ISO 9001:2015 certified, ISO/IEC 17025:2017 and ISO 17034:20166 accredited. Method 6020 CLP-M requires performance of a memory test after calibration of ICP-MS and before performing any analysis. This standard supports that test in the detection of the presence of any memory problems that would affect the data quality. To obtain the listed concentrations, equal volumes of Solutions A and B must be combined.