Qualitative Filter Paper HYUNDAI MICRO

Qualitative filter papers are originally used to detect materials which exist in analysis samples.
However, as they can be produced at a reasonable price and in various sizes, they are used for a variety of purposes from laboratories to production sites.

Features Of Product

Hyundai Micro’s qualitative filter papers consist of nearly 100% alpha-cellulose and have less than 0.1% of ash contents.
Characterized by their slim shapes. Enhanced wet burst strength They are available in any size you need as well as in standard sizes. We maintain the highest quality in accordance with ISO 9001:2008.

α-cellulose?

Alpha-cellulose is a main ingredient of pulp which is raw material for paper. It is divided into three types: α, β, and γ. Among these, α-cellulose is not soluble in solutions with 17~18% sodium hydroxide.
It has a high degree of polymerization and it is pure cellulose. Beta-cellulose is the soluble fraction which is reprecipitated on acidification of the solution; gamma-cellulose is that fraction remaining in the solution.

Applications

• Liquids purification in qualitative analysis
• Filtration of precipitate such as calcium hydroxide, lead sulfide and calcium carbonate
• Seed testing and Soil analysis
• Detection and measurement of dust and gas
• Filtration of buffer solutions and dye

Selecting The Right Paper

The selection of a laboratory filter depends on the conditions and objectives of the experiment or analytical procedure. The three most important characteristics of any laboratory filter are:

1. Determine the precision of filtration
2. Characters of liquids for filtration (pH, temperature, viscosity)
3. Examine carefully conditions of particles to be sampled
   (particle diameter, particle concentration)

• Low-cost filter papers for scientific experiments by students are available.

       Grade

• The pore sizes are indicated in accordance with the test methods selected by each filter paper manufacturer.
  Thus, filtration performance may be the same even though pore sizes are different with those of others manufacturers.

         Properties

• Basic weight ( g / ㎡ ) : In accordance with DIN EN ISO 536, a test is performed with filter papers from 500㎠ to 1,000㎠
  Thickness ( mm ) : In accordance with DIN EN ISO 534, the value measured with a thickness measurer under pressure
  of 10N / ㎠
• Filtration speed (s / 10ml ) : Fold a filter paper with a diameter of 110m in quarter and soak it.
  Then, hang it and filter 10 ml of distilled water at 20 °C. Time that it takes for filtration is measured.
• Retention rate ( ㎛ ) : Retention rate is calculated by test methods of filter paper manufactures. As each manufacturer has a
  different test method, use these data for reference only.
• Ash Contents ( % ) : Weight of residues after 10g of filter paper is ignited in platinum crucible at 800℃.