去年我们过microsoft实验室认可的时候,他们使用PQL的概念,感觉更适合。
PQL (Practical Quantitation Limit) is normally 3 to 10 times the MDL and is considered the lowest concentration that can be accurately measured, as opposed to just detected.
我们报告的N.D即为计算后的PQL值,不过这一点与not detect不相符。