“基准物质”是容量分析中用来配制与标定滴定液的一类物质。我国试剂分级标准中根据“基准物”的要求有专门的“基准试剂”规格。容量分析中滴定液的配制与标定,药典及医院制剂规范明确规定:①标定滴定液用“基准试剂”;②制备滴定液可采用分析纯或化学试剂,但不经标定直接按称重计算浓度者则采用“基准试剂”。但实际工作中, “Reference material” is a type of material used to prepare and titrate a titrant in a capacity analysis. China’s reagent classification standards based on “benchmark” requirements have a special “benchmark reagent” specifications. Volumetric titration volumetric preparation and calibration, Pharmacopoeia and hospital preparation specification clearly stipulates: ① standard titration solution with “reference reagent”; ② Preparation of titrant can be used analytically pure or chemical reagents, but without calibration directly calculated by concentration of concentration Then use the “benchmark reagent.” However, in actual work,