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nature : also known as chemical reagents or test drugs. The major is chemical reaction, analysis laboratory, pilot studies, the experimental use of teaching pure chemicals. Divided into general use by the general reagents, high purity reagent kit, equipment analysis reagents, clinical diagnostic reagents, biochemical reagents, inorganic ion reagent reagents. General reagent purity by the use or development of quality standards, divided into GB (GB), the Ministry of demarcation (HG) and the standard level (H / Q). Right Universal reagent formulation of four commonly-used specifications : (a) high-class pure or a Goods (guarantee reagent), or GR, the highest purity apply to sophisticated analytical and research work; (2) the analysis of pure or two Commodities (analytical reagent), or AR, purity Commodities weaker than the one applicable to critical analysis and research in general; (3) pure chemical or three Commodities (chemically pure reagent), or CP, purity and more difference between two goods, mines and apply to the general school chemistry experiment; (4) experimental reagents (Laboratory reagent) , referred to L. P., is now rarely seen. Reagents benchmark indicators of the quality of content, it should be 99.9% -100.1%. As science and technology and the development of new industries, the chemical reagent purity, cleanliness and precision requirements become more stringent and specialized, so we had a variety of uses exclusive agents, such as ultra-high purity reagent effects reagents, and provides a variety Only one grade specifications.
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