A simple densitometer for paper electrophoresis

A description is presented on a nonrecording densitometer for photometry of electrophoregrams in passing light. The instrument may be easily made in any biochemical laboratory with the aid of available parts; the parts may be replaced by analogous ones without impairing the quality of the device. A method is presented for tracing the curve of the optic density and for calculation of the ratio of the fractions of the mixture studied.