引言根据JJG178—81检定规程的要求,检定可见分光光度计需用重铬酸钾和硫酸铜两个系列八种浓度的溶液。由于溶液种类多,消耗量大,经常配制比较麻烦,又无可靠的方法来证实所配制的溶液的正确性;溶液不便于保存又不便于携带;而且检定时还涉及到装溶液的吸收池误差所带来的影响;另外,规程中只规定了溶液的浓度,没有相应的透射比(或吸光度)实际值,因此,用溶液检定时只能求仪器的“灵敏度”和“线性误差”而不能确定仪器的“透射比误差”,后者恰是分光光度计的一项主要技术指标。用灰玻璃代替溶液可以避免上 Introduction According to the requirements of JJG178-81 test procedures, the certified spectrophotometer uses two series of eight concentrations of potassium dichromate and copper sulfate. Due to the variety of the solution, the consumption is large, it is often troublesome to formulate, and there is no reliable method to confirm the correctness of the prepared solution; the solution is inconvenient for preservation and is not easy to carry; and the verification also involves the error of the absorbing pool of the solution In addition, the procedure only specifies the concentration of the solution, there is no corresponding transmittance (or absorbance) the actual value, therefore, the solution can only check the instrument when the “sensitivity” and “linear error” can not Determine the “Transmittance Error” of the instrument, which is just one of the major specifications of a spectrophotometer. Gray glass instead of the solution can be avoided