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在某些准确的分析中,需要对砝码进行校准。砝码的校准有绝对法及相对法。绝对法将被校砝码与标准砝码逐一进行比较,然后求得每一砝码的质量值。在分析化学中,通常只需采用相对校准法。多年来,在分析化学教学中,一直沿用Richards的置换法来进行砝码的相对校准。但是,随着科学技术的发展,各种机械加码式分析天平应用广泛。由于这些天平采用自动加码或减码方式,全部或一部分
In some accurate analyzes, the weights need to be calibrated. Calibration of the weight of absolute law and relative law. Absolute method will be school weights and standard weights one by one to compare, and then obtain the weight of each weight value. In analytical chemistry, usually only relative calibration is used. Over the years, Richards’s displacement method has been used in analytical chemistry teaching for relative calibration of weights. However, with the development of science and technology, various mechanical algebraic analytical balances are widely used. As these scales adopt automatic coding or subtractive coding method, all or part