Géopolis 1235
Contact :
Jean-Claude Lavanchy
Jasquelin Peña
Email :
jean-claude.lavanchy@unil.ch
jasquelin.pena@unil.ch
Tel : (021) 692-4364
The LiquiTOC measures the concentrations of total carbon (TC), total inorganic carbon (TIC), total organic carbon (TOC) and non-particulate organic carbon (NPOC) in aqueous samples. Measurements are made by high temperature oxidation of the carbon (850-900°C) and detection of CO2 by an NDIR photometer. Total bound nitrogen (TNb) can also be measured.
The instrument is equipped with an auto-sampler that can accommodate 44 samples. About 20 minutes are required to analyze each sample. A minimum sample volume of 8ml is needed; the detection limit is approximately 0.5ppm; the instrument gives a linear response over a range of 0 – 100ppm. Samples must fall within this concentration range
or be diluted accordingly by the user.
For further information read:
Mopper, K. and Qian, J. (2006). Water Analysis: Organic Carbon Determinations. Encyclopedia of Analytical Chemistry.
Schumacher, B. A. (2002). Methods for the determination of total organic carbon (TOC) in soils and sediments. National ESD, ed.: EPA.
Bisutti, I., Hilke, I., & Raessler, M. (2004). Determination of total organic carbon–an overview of current methods. TrAC Trends in Analytical Chemistry, 23(10), 716-726.