TOC-IRMS

Thermal oxidation with unrivalled sensitivity
Aqueous matrices with a solids option
TOC, TC, TIC, NPOC, POC, TNb

Sercon have developed, in close collaboration with Thermalox, a hyphenated TOC-IRMS system. The Thermalox TOC uses a combustion technique, which is superior to the persulphate oxidation method in that water samples containing high humic material can be analysed.

The TOC is connected to the Sercon HS2022 via a modified version of the Cryoprep, which has been optimised for TOC hyphenation. The system is capable of measuring small (sub 1ml) sample volumes and analysing DOC concentrations from 0.5 to 10ppm at levels of high precision (typically 0.1‰ for 13CO2 determinations).

  • Catalytic thermal oxidation. The only way to measure ‘real’ samples containing particulate or difficult to oxidise materials
  • Standard Deviation better than 20ppb on low level Carbon
  • Standard Deviation better than 10ppb on low level Nitrogen
  • Upper Range Limit greater than 50,000ppm for TOC
  • Detection Limit of better than 40ppb for TOC and 10ppb for TNb
  • Analysis time less than two minutes per replicate
  • Complete recovery, including Suspended Solid fraction
  • Handles salts and particulate easily
  • Holds up to 88 samples
  • Complete washing between samples ensures no carry over
  • Totally software driven from a Windows™ based platform
  • Automatic preparation of calibration standards
  • Total software control of the instrument system and data processing with Sercon Calisto software
  • Allows storage of sample analysis protocols to comply with good laboratory practice
  • Standby mode to preserve consumable life during periods of low use
  • Software controlled oxygen injection to match sample requirements thereby preserving the life of the consumables
  • Inter-file import/export facility from instrument PC to laboratory server or internet (allows rapid updating of software or transfer to common spreadsheet packages)
  • Fully compatible with all versions of Windows