The RSD of intra- day and inter- day assays were less than 5 %.

精密度考察硝苯地平日内、日间相对偏差均小于5％。

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The average recovery of three drugs is nearly 100% and the RSD for the inter - and intra - day were less than 6% . Endogenous matrix and commonly used drugs did not interfere with the analysis.

三者的方法回收率近100％，日内和日间精密度均小于6％，内源性物质和常用药物均不干扰测定。

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