测定10次空白，3sd为检测限，10sd report limit? for water如果固体样品的话，10sd浓度算到样品中的含量。

报告限和定量限，我们可以将2者处理为一样。不同文件的定义不同而已。既等于或大于校准曲线上最低浓度点所对应的样品中的目标物含量。Limit of Quantitation:‘(The content) equal to or greater than the lowest concentration point on the calibration curve.’ [AOAC - PVMC]It is also known as Limit of Reporting:‘The lowest concentration of an analyte that can be determined with acceptable precision(repeatability) and accuracy under the stated conditions of the test.’[NATA Tech Note #13]