Chromatography separates the constituents of a compound, based on differences in the chemical and physical properties of these constituents.
Ion chromatography (IC)
BIOLAB analyses anions by means of IC. The mobile phase is an aqueous solution, while the stationary phase is comprised of an ion exchange resin. The electric conductivity is determined in the detector. The time it takes a component to travel through the ion chromatograph (retention time) is a characteristic of each ion. The degree of conductivity indicates the concentration of that ion within the sample.
Gas chromatography (GC)
In gas chromatography, the carrier gas provides the mobile phase. The stationary phase is comprised of a liquid film – mostly silicone oil – on the inside of the capillary column. BIOLAB utilizes a flame ionisation detector (FID) for the quantitative determination of hydrocarbons. For other organic pollutants/contaminants such as polycyclic aromatic hydrocarbons (PAH), Polychlorinated biphenyls (PCB), volatile halogenated hydrocarbons (VHH), benzene, toluene, ethylbenzene and xylene (BTEX) and pesticides, samples are examined by means of a mass selective detector.