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随着化验分析工作量的增加,使用一台分光光度计测定磷含量已经不够,还需另一台进行测定,但是两台分光光度计的型号不同,功能也不同,测定结果偏差大,确保不了分析数据的可靠性,因此对磷含量标准工作曲线进行一元回归校正,在自由度n-2=7,α=0.05时,计算得到的相关系数γ>0.666,磷含量与吸光度之间具有线性相关关系,根据SH/T 0296—92《添加剂和含添加剂润滑油的磷含量测定法》(比色法)对重复性的要求,两台仪器对比数据的再现性小于SH/T 0296—92方法的重复性,仪器校正合格,可以同时使用,为分析数据100%的合格率提供了保障。
With the increase in the amount of laboratory analysis, the use of a spectrophotometer to determine the phosphorus content is not enough, but also to be determined by another one, but the two spectrophotometers of different models, different functions, the measurement results deviations, to ensure that no The reliability of the data was analyzed. Therefore, the standard calibration curve of phosphorus content was calibrated by one-dimensional regression. When the degree of freedom n-2 = 7 and α = 0.05, the correlation coefficient γ> 0.666 was calculated. There was a linear correlation between phosphorus content and absorbance Relationship, according to SH / T 0296-92 “Determination of phosphorus content of additives and lubricating oil additives” (colorimetric) repeatability requirements, the reproducibility of the two instruments is less than the data of the SH / T 0296-92 method Repeatability, instrument calibration qualified, can be used at the same time, to provide a guarantee for the analysis of data 100% pass rate.