In chemical experiments, the reflux digester is a commonly used laboratory utensil, which is mainly used to heat and reflux liquids. Among them, the COD reflux digester is a reflux digester specially used for chemical oxygen demand (COD) determination. COD is a common measure of the degree of pollution of a water body, which can be assessed by measuring the amount of aerobic organic matter in a water sample.
The COD reflux digester is able to use a heat source to heat and reflux the liquid, so that the organic matter in the water sample can be digested under acidic or alkaline conditions, and the organic matter is oxidized into a simple inorganic matter for subsequent determination. In the digestion process, it can ensure that the water sample is in a closed and evenly heated condition, so that the organic matter can be fully oxidized. By adding an appropriate amount of chemical reagents, such as potassium dichromate and mercury sulfate, it can chemically react with the organic matter in the water sample to produce colored substances or precipitates. The COD value in the water sample can be calculated by titration or spectrophotometry.
A good helper for the determination of chemical oxygen demand in COD reflux digester [Recommended]: COD reflux digester uses glass burr reflux tube instead of spherical reflux tube, and replaces tap water cooling with air-cooled and water-cooled technology. The cooling part is mainly completed by the burr condenser tube and the double fan, plus the dual action of the cooling water in the spherical return pipe and the fan in the upper part to ensure the reflux cooling of the sample.