fig6
![Is it the appropriate syringe filter? The loss of PPCPs during filtration by syringe filter](https://image.oaes.cc/e00639f0-176a-45b8-8929-84ec93b7bf50/4753.fig.6.jpg)
Figure 6. Mass losses (%) of PPCPs in Milli-Q water on the hydrophobic-PTFE filter by pre-rinsing. **Indicates that mass losses in the two types of syringe filters are significantly different by U-test at the 0.05 level; *indicates that the difference is not significant under the same condition.