Regarding solid-phase extraction technology, you need to understand positive pressure!

The traditional solid-phase extraction device adopts the negative pressure principle. Although the device is simple, it is difficult to control the flow rate and can only be operated manually. The flow rate is difficult to control, and there is a large difference in flow rate between columns. On the contrary, the Leo positive pressure solid-phase extractor uses positive pressure as the power source, with stable pressure between columns and controllable flow rate, which is favored by experimenters. Positive pressure solid-phase extraction technology is widely used in fields such as food safety, ecological environment, biomedicine, forensic identification, medical testing, and scientific research.