Exaxol 27 Component, Quality Control Standard, QC #27, in 5% HNO3, EPA 200.7

27-Component QC Standard QC #27, EPA 200.7 by Exaxol, catalog numbers 74QC27-100 and 74QC27-250, is a 27-element quality control standard (QC #27) in 5% nitric acid for EPA Method 200.7 ICP-OES calibration verification. Available in 100 mL and 250 mL from MBP, a registered vendor to many research institutes across the USA.