Funnel for filling adsorption tubes

Adsorption tube is an analytical technique for gases sampling. It is either a glass or stainless steel tube, which is filled with either an inorganic or organic solid (sorbent) with high surface area. Choosing appropriately the sorbent, you can sample some chemical compounds by adsorption. You can order tubes filled with a specific sorbent or you can order empty tubes and fill them by yourself. The holder and funnel should help one to fill the tube.

**Credits**

Carlos A. Neves - [IAG-USP]