Exaxol 21 Component, 10ppm ICP-MS, Quality Control Standard, QC #21, in 5% HNO3/Tr HF

21-Component ICP-MS Quality Control Standard QC #21, 10 ppm by Exaxol, catalog numbers MSQC21-100, MSQC21-250, and MSQC21-500, is a 21-element ICP-MS quality control standard (QC #21) at 10 ppm per element in 5% nitric acid with trace HF, for second-source calibration verification. Available in 100 mL, 250 mL, and 500 mL from MBP, a registered vendor to many research institutes across the USA.