Filter paper

Introduction to Filter paper

Filter paper is a porous fibrous consumable used to separate solids from liquids in laboratory sample preparation and analytical procedures. This material plays a fundamental role in filtering precipitates, clarifying solutions, and supporting chemical tests as well as industrial applications.

To choose the appropriate filter paper, users need to clearly determine the purpose of quantitative or technical qualitative analysis, along with fast, medium, or slow filtration speeds according to each type of precipitate. Filter dimensions are also an important criterion, featuring round filter formats from 15mm, 42.5mm, 45mm, 55mm, 70mm to 400mm, or square sheets of 600 x 600mm. Hoa Viet currently distributes filter paper lines from Newstar (China) and Sartorius (Germany) in packages of 100 pieces per box or pack, meeting diverse customer sample filtration needs.

How do qualitative filter paper and quantitative filter paper differ?

Qualitative filter paper is mainly used for separating precipitates and clarifying solutions in qualitative tests without the need to weigh the residual mass. Quantitative filter paper is treated to minimize ash content after incineration, dedicated to precise gravimetric analysis.

What factors should be considered when choosing fast, medium, or slow filtration speeds?

The filtration rate is selected based on the size and state of the precipitate particles in the solution. Fast filter paper is suitable for coarse or gelatinous precipitates, while medium and slow filter papers are suitable for fine precipitates to avoid turbidity in the filtrate.

Which brands of filter paper does Hoa Viet distribute?

Hoa Viet currently supplies qualitative and quantitative filter paper products from two manufacturers: Newstar (China) and Sartorius (Germany). Products are packaged as 100 sheets per box or pack, available in a full range of circular and square sheet sizes.

How should laboratory filter paper be stored to maintain its durability?

Filter paper should be stored in a dry place, away from high humidity environments and direct sunlight to prevent altering the paper fiber structure. After taking out the product, users should tightly close the box or reseal the pack to prevent dust intrusion and sample contamination.