0.07 mg/L C from NIST KHP Total Organic Carbon (TOC) Standard for OI Analytical and Teledyne Tekmar Analysers
1 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

