如题：什么是quality-control parameters ？怎么个概念？
请结合下面这句话来解释一下，谢谢了

Due to the very low levels of contamination, this sort of analysis requires not only powerful analytical technologies to reach limits around the ng/L level, but also quality-control parameters (e.g., blank and spike samples) to monitor potential contamination or losses during sample treatment. 返回小木虫查看更多