The invention relates to a process for the isolation andor purification of a proteinaceous material, wherein a solid phase comprising a mixture of hydrophobic and hydrophilic groups is used. In one embodiment, the user is able to register for a progressive level alert. For example, when the dispenser is mounted to an inner surface of a pivotable lid of a waste disposal can, closure of the lid against a base of the can causes a jarring impact on the lid which results in an amount of the dispensing agent falling through the dispensing opening. By depressing the push-on switch to connect the switch electrode, air held in the first air chamber is squeezed and flows to the second air chamber without escaping.