Qualitative Filter Ppaper Circular Oil Detection Filter Paper Laboratory Chemical Analysis Filtration Paper Paper Diameter 18 cm(Slow Filter Speed)

Qualitative filter paper is mainly divided into three kinds of filtration speed: fast, medium and slow. Generally, there are more residual ash, which is only for general qualitative analysis and used for filtering precipitation or suspended solids in solution. It cannot be used for quality analysis.The type and specification of qualitative analysis filter paper is basically the same as that of quantitative analysis filter paper, which means fast, medium and slow speed, but fast, medium speed, and slow speed are printed. However, when the filter paper is not used for quantitative and qualitative analysis, the filter paper should be paid attention to:1. Generally, natural filtration is used to separate the liquid from the solid by using the filter paper body and the ability to trap solid particles;2. Since the mechanical strength and toughness of the filter paper are poor, try to filter by suction as little as possible. If the filter speed must be increased, in order to prevent the filter from passing through and causing the filter to fail, when the air pump is filtered, it can be in the funnel according to the suction force. Stack 2 to 3 layers of filter paper. When vacuum filtration is used, it leaks. Put a layer of dense filter cloth first, and then put filter paper on it to filter;3. The filter paper is best not to filter hot concentrated sulfuric acid or nitric acid solution.Diameter: 18 cmPackage: 100 / pkInstructions:1. The filter paper folded, two consecutive, stacked into a 90 ° central angle shape.2. The folded filter paper, according to one side of the three, the other side of a layer of open, into a funnel-shaped.3. The funnel-shaped filter paper into the funnel, filter paper edge to be lower than the funnel edge, pour some water to the funnel mouth, so wet the filter paper and the funnel wall stick, then the rest of the water drained, stand-by.4. Place the funnel with the filter paper on the filter hopper (eg on the ring of the iron frame), and lower the beaker or test tube containing the filtrate in the funnel neck and the funnel neck tip against the wall of the receiving container.5. To the funnel into the need to filter the liquid, the right hand holding liquid beaker, left hand holding a glass rod, the bottom of the glass bar on the low side of the funnel on three, so close to the glass stick glass, to be filtered out along the cup along the liquid, Along the tilt of the glass rod, homeopathy into the funnel, the funnel into the liquid, the liquid surface can not exceed the height of the filter in the funnel.6. When the liquid through the filter paper, along the funnel neck down, to check whether the liquid downstream along the wall along the cup, note to the bottom of the cup. Otherwise, you should move the beaker or rotary funnel, so that the funnel tip and the beaker wall affixed to the liquid can be slowly along the inner wall of the beaker.There is other specifications on sale, If you need please click herefor purchasing or contact with customer service.==========Model Number : 18cmOrigin : Mainland ChinaClassification : BeakerProduct : Qualitative filter paperSpecification : 18 cmFiltration rate : Fast/Medium/SlowPackage : 100/pk

• 1. Generally, natural filtration is used to separate the liquid from the solid by using the filter paper body and the ability to trap solid particles;
• 2. Since the mechanical strength and toughness of the filter paper are poor, try to filter by suction as little as possible. If the filter speed must be increased, in order to prevent the filter from passing through and causing the filter to fail, when the air pump is filtered, it can be in the funnel according to the suction force. Stack 2 to 3 layers of filter paper. When vacuum filtration is used, it leaks. Put a layer of dense filter cloth first, and then put filter paper on it to filter;
• 3. The filter paper is best not to filter hot concentrated sulfuric acid or nitric acid solution.
• Diameter: 18 cm
• Package: 100 / pk