Your cart is empty.
Your cart is empty. Qualitative filter paper 30cm 100 circles
Qualitative filter paper is a commonly used material in chemical laboratories. It is mainly used to filter precipitates and suspended solids. Most filter papers are composed of cotton fibers. Depending on the application, the production methods used are also different. The qualitative filter paper is made of fiber, so there are countless small holes on the surface for liquid particles to pass through, but larger solid particles cannot pass through. According to the pore size of the filter paper, it is often divided into three types: fast, medium and slow. Please choose and use according to the type of precipitation.
Diameter: 30 cm
Aperture of fast filtration is 80-120 micron
Aperture of medium filtration is 30-50 micron
Aperture of slow filtration is 1-3 micron
Package: 100 circles
How to use filter paper?
1. Fold the filter paper in half, twice in a row, and fold it into a 90° central angle shape.
2. Press the folded filter paper into three layers on one side and one layer on the other side to form a funnel.
3. Put 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 to make the soaked filter paper abut the inner wall of the funnel, and then pour out the remaining clean water and set aside.
4. Place the funnel with the filter paper on the funnel stand for filtering (such as the ring of the iron stand), place the beaker or test tube that receives the filtrate under the funnel neck, and make the tip of the funnel neck lean against the wall of the receiving container.
5. When injecting the liquid to be filtered into the funnel, hold the liquid beaker in the right hand and the glass rod in the left hand. The lower end of the glass rod is close to the lower surface of the third layer of the funnel, so that the mouth of the cup is close to the glass rod, and the f
$10.79
$ 4 .99 $4.99