分析规程的精密度通常以一系列测量数值的标准差或相对标准差(变异系数)来表示。

The precision of an analytical procedure is usually expressed as the standard deviation or relative standard deviation (coefficient of variation) of a series of measurements.

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采用大肚移液管，将标准溶液配制成整数级别的贮备液、中间液、使用液时，利用工作曲线计算测定值需要引入校正系数，利用该方法可简化操作，减少误差提高实验准确度、精密度。

The correction coefficient needs to be adopted to calculate the determinated value of work curve, it simplifies the operation, reduces error and enhances the accuracy and precision.

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精密度试验的变异系数满足农药多残留痕量分析的要求。

Coefficient of variation of the precision experiments met requirements for analysis of trace amounts of multiple pesticides.

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