CPC B01L 3/50255 (2013.01) [B01L 3/5635 (2013.01); G01N 1/4077 (2013.01); B01L 2200/0647 (2013.01); B01L 2200/0684 (2013.01); B01L 2300/0627 (2013.01); B01L 2300/0681 (2013.01); G01N 2001/4088 (2013.01)] | 7 Claims |
6. A preprocessing method comprising:
removing a removing target from a liquid sample accommodated in a sample container using a first filter and filtering a microorganism from a filtrate of the first filter using a second filter, a bubble point of the second filter being higher than a bubble point of the first filter, the filtering the microorganism including supplying the filtrate of the first filter to one side of the second filter and receiving a waste liquid from another side of the second filter;
blocking a flow channel between the second filter and the sample container in response to a decrease in a remaining amount of the liquid sample in an upstream position with respect to the second filter in the filtering the microorganism;
supplying a cleaning solution to the one side of the second filter and receiving a waste liquid from the other side of the second filter to clean the second filter; and
supplying a recovered liquid to the other side of the second filter and receiving the recovered liquid from the one side of the second filter to recover the microorganism from the second filter.
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