CAPILLARY GAP AND OVERFLOW CHAMBER FOR METERING A VOLUME ONTO A REACTIVE SURFACE

摘要

A method for volume metering of a liquid sample onto a reactive surface and a flow metering capillary device for controlled fluid flow comprising two opposing surface areas spaced apart throughout a capillary zone of intended liquid transport at a distance no greater than that which will maintain a capillary flow of liquid introduced therebetween, means to permit introduction of a test specimen between these surfaces, there being formed between said opposing surfaces an overflow channel and an overflow chamber which draws any excess liquid from the means for introducing the liquid between the surfaces.