Question

Which equipment is used to measure trihalomethane in water and effluent samples?

Answer 1

Trihalomethanes (THMs) are chemical compounds in which three of the four hydrogen atoms of methane (CH4) are replaced by halogen atoms.

hey are generally referred to as disinfection by-products. They result from the reaction of chlorine or bromine with organic matter present in the water being treated.

This analysis is usually performed  with gas chromatography (GC) combined with a preconcentration step. The detectors most

widely used in this type of analyses are mass spectrometers (MS) and electron capture  detectors (ECD).

The techniques  covered are direct aqueous injection (DAI), liquid–liquid extraction (LLE), headspace  (HS), and membrane-based techniques.