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ZHAOBO
15
2022
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Inorganic analytical reagents are common inorganic chemicals used in chemical analysis. Its purity is higher than industrial products, less impurities.
The author：
Organic reagents for inorganic analysis refer to specific organic compounds such as precipitants, extractants, chelators and indicators used in the determination, separation and enrichment of elements in inorganic matter analysis, rather than general solvents, organic acids and organic bases. These organic reagents must have good sensitivity and selectivity. With the development of analytical chemistry and the chemical industry, more sensitive and selective reagents will be developed, such as the compounds of Crown ether that have been available since 1967 for complexing some metals (such as alkali metals, alkaline earth metals) and ammonium ions.
The reference reagent (Primary standards) is a compound with high purity, little impurities, good stability and constant chemical composition. In the reference reagents, there are capacity analysis, pH determination, calorific value determination and so on. In each category there is a first base and a working base. The first reference must be verified by the National Academy of Metrology, and the production unit uses the first reference as the measurement standard of the work reference product. The reference reagent of commercial operation mainly refers to the reference of capacity analysis work in the capacity analysis class [content range is 99.95%~100.05%(titration by weight)]. It is generally used to calibrate titrant.
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