Filter Funnel, Hirsch, Top Diameter 40mm, Disc Diameter 10mm, Porosity Coarse

The size and purpose of a Hirsch funnel and a Buchner funnel are where they differ most. For separating particles from liquids in lower amounts, a Hirsch funnel is a scaled-down variant of the Buchner funnel. A Buchner funnel, on the other hand, employs vacuum filtration for larger liquid volumes.

The main use of a Hirsch funnel is to filter liquids and suspensions, especially when separating liquids from solids. Additionally, it is used to pre-treat samples by removing solid impurities that might obstruct analytical measurements. For better separation, Hirsch funnels can be used in combination with filter paper or a fritted disc.

Filter paper is actually necessary for a Hirsch funnel to function. The purpose of the filter paper is to capture particles while letting liquids flow through. One kind of vacuum filtration device for separating solids from liquids is the Hirsch funnel, where the filter paper acts as an essential barrier for the particles.

The main use of a sintered funnel in scientific labs is filtration, more especially the removal of solids from liquids or solutions. It has a porous glass or porcelain disc (frit) that traps solid particles while letting liquids flow through.