15 mg/L from NIST KHP (Acidified with HCl) Total Organic Carbon (TOC) Standard for OI Analytical and Shimadzu TOC-L/TOC-V/TOC-4200 Analysers
5 mg/L from NIST KHP Total Organic Carbon (TOC) Standard for OI Analytical, Teledyne Tekmar Phoenix and Shimadzu TOC-L/TOC-V/TOC-Vcsh/TOC-4200 Analysers

