Chemical Oxygen Demand (COD) is a measure of the oxygen equivalent of the organic matter in a water sample that is susceptible to oxidation by a strong chemical oxidant.
The function of the milk analyzer is to make quick analyses of milk on fat(FAT), non-fat，solids (SNF), proteins, lactose and water content percentages, temperature (℃), freezing point, salts, total solids, as well as density of one and the same sample directly after milking, at collecting and during processing.
Retort stands are often used in the chemistry laboratory. For instance, they are used for distillation experiments (such as organic distillations) and titrations (where they hold a burette). They are also used as supports in filtration.
