On the microparticles testing and identification , the first step is to separate different kinds of particles from the surrounding fluid medium . Therefore , an effective and uncontaminating separation method is very important .
在对生物微粒进行分析或检测时，其第一步就是将生物微粒从其所处介质中分离出来，因此一种高效、无污染的分离技术是十分关键的。
uncontaminating