TOC-V

Shimadzu TOC-V CPN Analyzer

In our group, the TOC-V CPN (Shimadzu) is primarily uitilized for quantification of total Dissolved Organic Carbon (DOC) in filtered (0.45 µm, Nylon or equivalent) liquid samples. Dissolved Inorganic Carbon (DIC) is stripped from the sample first, following acidification to pH 2 and purging DIC as volatile CO₂ with an inert gas (Argon or Nitrogen). The remaining organic carbon is then techniqually determined as NPOC (non-purgeable organic carbon) as volatile organic compounds (VOC) can be removed alongside DIC with the inert gas in the previous step. The sample is then injected into an oven at 680 °C where the carbon is burned to CO₂ which is subsequently detected and quantified with a non-dispersive IR-Detector. DOC values can be determined by this method in the low mg/L range. User regulation