Quantitative Filter Paper Circular Filter Paper Use for Precision Quantitative Analysis Diameter 9 cm 100/PK(Fast Filter Speed)

Diameter: 9 cmPackage:100 / PK1. IngredientsQuantitative filter paper in the manufacturing process, the pulp after hydrochloric acid and hydrofluoric acid treatment, and washed with distilled water, most of the impurities in the paper fiber removed, so the residual ash after burning very little impact on the analysis of almost suitable for Precision quantitative analysis. The amount of ash produced after ashing is not more than 0.0009%.2. SpecificationAt present, domestic production of quantitative analysis of filter paper, There are three speeds to be choose: fast, medium and slow, respectively, in the filter paper box with fast, medium, slow as the sign classification. The shape of the filter paper has two kinds of round and square, circular paper specifications according to the diameter of sub-7cm, 9cm, 11cm, 12.5cm, 15cm and 18cm several.3. UsageQuantitative filter paper is mainly used for ashing after weaker the weighing analysis experiment, that is, quantitative analysis of chemical analysis of the weight of the test and the corresponding analysis test, the ash of each filter after the ash weight is a fixed value; qualitative filter is used in general Filtration, that is, qualitative chemical analysis and the corresponding filter separation.The difference between quantitative filter paper and qualitative filter paper is that the amount of ash produced after ashing is not more than 0.13% and the quantitative filter paper is not more than 0.0009%.Ash-free filter paper is a quantitative filter paper, the ash content of less than 0.1mg, the weight of the balance in the analysis can be ignored.Note that both quantitative and qualitative filter paper filter paper is the concept of both the cellulose does not apply to other types of filter paper such as glass microfiber filter paper.4. ApertureFast filtration: aperture is 80 to 120 micronsMedium filtration: aperture is 30 to 50 micronsSlow filtration: aperture is 1 to 3 micronsHow to use quantitative 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 filling the funnel with the liquid to be filtered, hold the liquid beaker in the right hand and the glass rod in the left. Leaning along the glass rod, it flows into the funnel homeopathically, and the liquid flowing into the funnel should not exceed the height of the filter paper in the funnel.==========Model Number : 9cmOrigin : Mainland ChinaClassification : BeakerProduct : Quantitative filter paperSpecification : 9 cmFiltration rate : Fast/Medium/SlowPackage : 100 / PK

• Product : Quantitative filter paper
• Specification : 9 cm
• Filtration rate : Fast/Medium/Slow
• Package : 100 / PK