We are going to construct this DGT (Diffusive gradients in thin films) device or technique to study the metal bioavailabilty in contaminated soils.It is readily available at DGT Resarch Ltd.(Lancaster,UK). As it is not readily available in India, we are going to customize this device. But there is a problem of Gel preparation. If anyone has any idea regarding preparation of gel used in this device please come with the answer.