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

