Qualitative Filter Paper, Filter Membrane for Laboratory Research, Round Oil Detection Filter Paper, Diameter 300 mm, 100 Circles(Slow Filtration)

Qualitative filter paper 30 cm 100 circlesDiameter: 30cmRapid filtration pore size is 80-120 micronsMedia filter pore size is 30-50 micronsSlow filter pore size is 1-3 micronsPackaging: 100 yuanHow to use filter paper?1. Fold the filter paper in half twice in a row, and fold it into a 90° central angle.2. Press the folded filter paper into three layers on one side and one layer on the other side to form a funnel shape.3. Place the funnel-shaped filter paper into the funnel. The edge of the filter paper should be lower than the edge of the funnel. Pour some clean water into the mouth of the funnel so that the soaked filter paper is close to the inner wall of the funnel, then pour out the remaining water and set it aside.4. Place the funnel and filter paper on a funnel stand for filtration (such as the ring of an iron stand), place the beaker or test tube receiving the filtrate under the neck of the funnel, and make the mouth end of the funnel rest against the wall of the receiving container.5. When pouring the liquid to be filtered into the funnel, hold the liquid beaker in your right hand and the glass rod in your left hand. The lower end of the glass rod is close to the lower surface of the third layer of the funnel, so the mouth of the cup is close to the glass rod, and the filtered liquid flows out along the mouth of the cup. Tilt along the glass rod, and the liquid flows into the funnel. The liquid flowing into the funnel should not exceed the height of the filter paper in the funnel.6. As the liquid flows down the neck of the funnel through the filter paper, check to see if the liquid flows down the wall of the cup and pours into the bottom of the cup. Otherwise, you should move the beaker or rotate the funnel so that the tip of the funnel is firmly against the wall of the beaker, so that the liquid can slowly flow down the inner wall of the beaker.

• Qualitative filter paper is a commonly used material in chemistry laboratories. It is mainly used to filter sediment and suspended solids.
• Most filter paper is made from cotton fibers. Depending on the application, the production methods used vary.
• Qualitative filter paper is made of fiber, so there are countless small pores on the surface for liquid particles to pass through, but larger solid particles cannot pass through.
• According to the pore size of filter paper, it is usually divided into three categories: fast pore, medium pore and slow filter paper. Please select and use according to precipitation type.