Primary standards is of high purity, less impurity, good stability, chemical composition constant. Capacity analysis, the reference reagent in determination of pH in determination of calorific value, and so on. Have the first reference and classification standard of each classification. Where the first reference must be made by the National Institute of metrology verification. The production units used as the first reference standard benchmark products. At present, reference reagent business mainly refers to the capacity analysis in capacity analysis of benchmark [content range 99.95%~100.05% (gravimetric titration). Generally used to calibrate the titrant.
The old name for enzymes. With special catalytic ability of the protein. It consists of organisms (animal, plant, microorganism), or enzyme as a biological catalyst. It continues to promote a large number of complex chemical reactions in living organisms. Such as amylase starch and glycogen hydrolysis catalyst into dextrin and maltose; enzymatic protein hydrolysis peptide; lipase catalyzed hydrolysis of fats into fatty acids and glycerol.
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