The TOC-VWS/TOC-VWP is developed to deliver ultrahigh results on sensitivity measurements through its newly designed high-sensitivity NDIR. The results are rendered by minimizing the reagent blanks that hinder accurate analysis. Powerful oxidation is done through a combination of peroxosulfuric acid, UV illumination, and heating. Purging of reagent bottle which reduces consumption of carrier gas is not needed. The TOC-VWS/TOC-VWP has these measurement principles, the TC Measurement (Phosphoric acid and the oxidant (persulfate) are added to the sample that's heated under UV illumination to convert the TC in the sample to carbon dioxide), the IC Measurement, TOC Measurement and NPOC Measurement.