fast and simple online determination of cod

The QuickCOD determine s reliably fluctuating loads and peak loads up to 200,000 mg / l and provides measurement results in a few minutes. The measuring system operates with the ultra-high temperature method at 1200 ° C and goes with n o dangerous chemicals.ĭue to the patented sampling system FlowSampler a blockage-free sampling is ensured. With LAR ' s QuickCOD ultra, the online analyser to determine the total oxygen demand, both alternatives are possible. An additional alternative is the direct measurement of the oxygen demand. T hus, the fast and reliable O nline - TOC -M easurement technology can also be used for COD determination. A first step to use a constant sample matrix, is to adjust a correlation factor, according to the mixture of substances in water. The European Commission adopts a final decision about the exceptional authorizations.īecause of t he danger ous dichromate method, the varying recovery rates, the known chloride interferences as well as the high demand of time of 2h alternative approaches are urgently required. Manufacturer of COD tests, which employ Potassium dichromate, can apply for a special individual permission for re-use. The European Parliament and the Council called ' REACH ' ( Registration, Evaluation, Authorisation and Restriction of Chemicals) have a dopt a ban in A pril 2013, which prohibits the use of th is chemical. For i nstance the chemical oxygen demand (COD) of water is determined by the definition of p otassium dichromate method (dichromate method DIN 38409-41: 1980-12).Ī few years ago it was only classified as irritant but today it is considered to be mutagenic, toxic for reproduction and dangerous for the environment as well as carcinogenic. It is used in the tannery, in certain printing processes and in the chemical analysis. Double potassium is also known as potassium dichromate.

Fast and simple online determination of cod