What are the different grades of filter paper?

What are the different grades of filter paper?

Qualitative filter paper

  • Grade 1. Grade 1 qualitative filter paper has the pore size of 11 μm.
  • Grade 2. Grade 2 qualitative filter paper has the pore size of 8 μm.
  • Grade 3. Grade 3 qualitative filter paper has the pore size of 6 μm.
  • Grade 4. Grade 4 qualitative filter paper has the pore size of 20~25 μm.
  • Grade 602 h.

What is the pore size of Whatman filter paper?

11 µ
Whatman 1001-110 Qualitative Filter Papers; 11.0 cm dia; pore size, 11 µ; 100/box from Cole-Parmer India.

What is the composition of filter paper?

Filter paper is a quantitative paper used for filtering and made of pure cellulose treated with hydrochloric and hydrofluoric acid. This kind of paper burns out practically without any remains (less than 0.0001 g ashes).

How many types of filter paper are there?

Different Types of Qualitative Whatman Filter Paper & their Properties

Paper Grade Available Sizes
Filter Paper Grade 1 Circles: 10 mm to 150 cm (available prepleated) Sheets: 26 x 31 mm to 600 x 600 mm
Filter Paper Grade 2 Circles: 42.5 mm to 500 mm (available prepleated) Sheets: 460 x 570 mm to 580 x 680 mm

What is the difference between qualitative and quantitative filter paper?

The qualitative filter paper is used for general filtration. The main difference between quantitative filter paper and qualitative filter paper is the amount of ash produced after ashing. Qualitative filter paper does not exceed 0.13%, quantitative filter paper does not exceed 0.0009%.

How do I choose a filter paper?

How to select the right filter paper?

  1. Effective area, namely filter paper use area is big, dust capacity is big, resistance is small, service life is long, of course, the cost also increases accordingly.
  2. The smaller the fiber diameter, the better the interception effect and the higher the filtration efficiency.

What does a 0.45 micron filter remove?

0.45 µm membranes are used to remove larger bacteria or particles and are often used in water quality QC testing. 0.45 µm membranes are tested for their ability to remove 1 x 105 CFU/cm2 of Serratia marcescens. These are the pore sizes most common in Thermo Scientific Nalgene filtration products.

What is the difference between Whatman filter paper 41 and 42?

Grade 41 filter paper was used for the first filtration step, and Grade 42 filter paper was used for the second filtration step (Table 1). The data show that the use of Grade 42 quantitative filter paper gave very stable results with good repeatability.

What is quantitative filter paper?

Quantitative Filter Papers/ Hardened Filter Papers are used for quantitative and gravimetric analyses where the precipitate is to be recovered, as well as for pressure or vacuum filtration. Qualitative Filter Papers are used for qualitative analytical techniques to separate, determine and identify materials.

What is filter pulp?

n. 1 a porous substance, such as paper or sand, that allows fluid to pass but retains suspended solid particles: used to clean fluids or collect solid particles.

What is normal filter paper?

What is Normal Filter Paper? “Normal filter paper is a semi-permeable barrier that we use to separate components in a liquid flow or an air flow. These papers have wet strength, porosity, particle retention, volumetric flow rate, compatibility, efficiency and capacity.

What are the two types of filter paper?

There are two different types of filters paper that are generally used – Quantitative and Qualitative. Qualitative filter papers are used in applications where routine separation is required to determine and identify materials.

What is Ahlstrom filter paper?

Ahlstrom offers a complete range of low ash filter papers for general laboratory work that provides you with the correct combination of particle reten- tion, filtration speed, loading capacity and wet-strength. All our qualitative grades consist of > 95% super refined α-cellulose and linter fibers.

What is the difference between Ahlstrom 609 and 613?

Ahlstrom 609: 4µm – Medium Speed This grade is an evolution of Ahlstrom 613 for use in the beer industry. This is a filter paper with an extremely low iron and nitrogen content for the analysis of protein in beer. Ahlstrom 613: 6µm – Medium Speed This is a strong filter paper with a medium flow rate and retention.

What is Ahlstrom grade 631 used for?

Ahlstrom 631: 10µm – Medium Speed This grade is used for the filtration of coarse particles and gelatinous precipitates such as ferric aluminum and magnesium hydroxides. Ahlstrom 631 is used in air monitoring and gas filtration when high flow rate is needed.

Where can I find information about Ahlstrom grade papers?

Most Ahlstrom papers can be supplied in special sheet, roll or die-cut sizes. To obtain information on other sizes and grades, please contact your local distributor or Ahlstrom. Samples Product samples are available, upon request, to assist you in determining the Ahlstrom grade that is most suited to your application.