Qualitative filter papers are what most users would consider general purpose filter papers, designed for use in analytical separations and qualitative analytical techniques for the determination and identification of particles, contaminants, or material components.
Quick information:
-product name: Qualitative filter paper
-Brand: BKMAM
-Main material: cotton fiber
-Color: natural white
-Shape: circle
-Product size: diameter 7cm/ 9cm/11cm/12.5cm/ 15cm/18cm
-Type: fast/medium / slow speed
-filter pore size: 80-120um for fast speed
30-50um for medium speed
1-3um for slow speed
-Package:100pcs/pack and shrink-wrapped for purity and cleanliness
NOTE: Laboratory products are designed for laboratory applications only. This product is not approved for use in medical, clinical, surgical, or other patient applications.
Quantitative filter paper vs. qualitative filter paper
Used commonly in quantitative and qualitative analysis, filter papers must be closely matched to the application according to the physical characteristics of the filter paper.
* The difference between the two is that the quality of the ash after ignition is different. The ash content of the quantitative filter paper is very low, it can be ignored in gravimetric analysis. Qualitative filter paper has a lot of ash after burning, which is not suitable for gravimetric analysis.
* qualitative filter paper is used for qualitative chemical analysis and corresponding filtration separation, and quantitative filter paper is used for gravimetric analysis test and corresponding analysis test in quantitative chemical analysis.
Quantitative filter papers are designed for sample preparation and gravimetric analysis and are typically selected based on the level of surface roughness and ash content required for the filtration procedure. Quantitative papers are acid-treated to reduce ash, often to less than 0.01%. This low ash content is useful for quantitative analyses. After filtration or sample collection, the filter paper can be ignited and burned off, leaving very little residue that could interfere with downstream measurements.
How to use filter paper?
1. Fold the filter paper in half, twice in a row, and fold it into a 90°center-shaped funnel.
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 funnel. Fill the funnel with clean water so that the soaked filter paper is close to the inner wall of the funnel. Pour out the remaining clean water and set aside.
4. Place the funnel with the filter paper on the filter funnel rack (such as on the iron stand, or on the ring), Place a filter
beaker or test tube under the funnel neck, and lean the tip of the funnel neck against the wall of the receiving container.
5. When injecting the liquid to be filtered into the funnel, hold the liquid cup in the right hand and the glass rod in the left.
make the cup mouth close to the glass rod, and the filtered liquid will flow out from the cup mouth. Then flow into the funnel
obliquely along the glass rod, leaving the liquid in the leakage body, and the liquid level cannot exceed the height of the filter paper in the funnel.
6. When the liquid passing through the filter paper flows down the neck of the funnel, check whether the liquid flows down the wall of the cup and fill it to the bottom of the cup. Otherwise, you should move the beaker or rotate the funnel to make the tip of the funnel and the wall of the beaker stick firmly. You can make the liquid flow down the wall of the cup.
About BKMAM factory:
BKMAM is a professional lab and medical consumable supplier located in Hunan, China. Modernized workshop and warehouse covers 260,000 square meters, 100,000 level purification workshop, high technology eo sterile machine, injection molding machine, plastic blister machine, and packing machine are all available here.
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