ECD Analyzers has released its next generation precision Total Organic Carbon (TOC) analysers, aimed at municipal drinking water, wastewater and industrial water applications.
The instruments employ non-dispersive infrared (NDIR) detection technology, which the firm says provides engineers with the confidence to know when treatment is complete.
The firm describes the unit as a full-featured instrument that employs the UV persulphate oxidation method. It detects generated carbon dioxide (CO2) and the NDIR portion of the instrument supports analysis.
The method and the analyser provide conformance with standards such as US EPA, DIN, CE, ASTM and NAMUR regulations, as well as ISO. ECD says the device is simple to use. First, the water sample is acidified and sparged to remove inorganic carbon. The remaining liquid is mixed with sodium persulphate and digested by two high-performance reactors. The resulting CO2 is then stripped from the liquid and, after drying, its concentration is measured by the NDIR analyser. The analyzer measures TOC’s ranging from 0-5 mg/L to 20,000 mg/L. The design features a valve-free sample line, said to largely eliminate blockages.
It also differs from conventional analysers, where the flow is controlled by a glass tube rotameter, in that the the carrier gas flow with the ECD TOC analyser is controlled digitally.
