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制作校正曲线是分析工作者经常遇到的问题。由于试验误差的影响,响应值(例如吸光度、谱线强度等)和被测组分含量之间通常表现为相关关系。相关关系是一种统计关系,如果用曲线表示这种关系,试验点将围绕按相关关系画出的校正曲线有一定程度的离散。表征响应值离散程度的标准差可由下式表示,n 为实验点数目,Y_i 是按回归方程 Y=a+bx
Making calibration curves is a problem that analysts often encounter. Due to the influence of experimental errors, the response values (eg, absorbance, spectral line intensity, etc.) generally correlate with the content of the measured components. Correlation is a statistical relationship, if the curve shows this relationship, the test points will be drawn around the correlation curve drawn a certain degree of dispersion of the calibration curve. The standard deviation of the discreteness of the response value can be expressed as follows: n is the number of experimental points, Y_i is the regression equation Y = a + bx