Total Organic Carbon (TOC)

TOC is a popular analytical technique in water quality testing, as seen in many official analytical methods today. The United States Pharmacopoeia (USP), European Pharmacopoeia (EP) and Japanese Pharmacopoeia (JP), recognize TOC as a required test for purified water and water for injection (WFI).

TOC-Fusion-500-weiss-test
Fusion UV/Persulfate Analyzer

TOC-Lotix-500-weiss-test
TOC LOTIX (Combustion)

TOC-Torch-500-weiss-test
Torch Combustion TN Analyzer

TOC-Lotix-500-weiss-test
Boat Option for TOC Lotix)

Fusion UV/Persulfate Analyzer
Fusion UV/Persulfate Analyzer

Torch Combustion TN Analyzer
TOC/TNb Torch Combustion TN Analyzer

LSS Boat – Lotix Solids Sampler
LSS Boat – Lotix Solids Sampler

TOC Overview

​TOC analyzers can measure:

  • Total carbon (TC)
  • Total organic carbon (TOC)
  • Inorganic carbon (IC)
  • Nonpurgeable organic carbon (NPOC)

TOC measurement involves:

  • Oxidizing organic carbon in a sample
  • Detecting and quantifying the oxidized carbon (CO2)
  • Presenting the result in units of mass of carbon per volume of sample

NDIR Pressurization

Pressurized detection, or static read, is a technique used for concentrating the CO2 ​produced by the oxidation of the sample. The technique can be used for both qualitative and quantitative analysis. In this section the basics of the pressurization technique will be described.

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