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.
Amino acid (Amino acid) as a molecular structure containing amino group (- NH2) and carboxyl (COOH) organic compounds. The formula is H2NRCOOH. Omega gamma delta beta alpha amino carbon atoms according to the connecting position in the carboxylic acid, can be divided into alpha, beta, gamma, Delta. Amino acids (C.C - C - C C - COOH).
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