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表8 分析方法准确度和精密度要求

Table 8 Accuracy and precision requirements for analytical methods

含量范围	准确度		精密度
含量范围	$\begin{array}{c} \|Δ l g \overset{ˉ}{C_{i}} (G B W)\| = \\ \|Δ l g \overset{ˉ}{C_{i}} - l g C_{s}\| \end{array}$	RE%(GBW)= $\frac{\|\overset{ˉ}{C_{i}} - C_{s}\|}{C_{s}}$ ×100%	RSD%(GBW)= $\frac{\sqrt{[\sum_{i = 1}^{12} (C_{i} - C_{s})^{2}] / (n - 1)}}{C_{s}}$ ×100%
检出限3倍以内	≤0.10	≤23	17
检出限3倍以上	≤0.05	≤12	10
1%~5%	≤0.04	≤10	8
>5%	≤0.02	≤4	3