A simple sensitive recording differential refractometer for column chromatography.
Light passes through a hollow prism containing the sample liquid and is then focussed on a position-sensitive photodiode. Movement of the image due to a change in the refractive index of the sample produces an electrical signal which is recorded directly on a potentiometer recorder.
Majer
J R
JR
Chemistry Department, P.O. Box 363 University of Birmingham, Edgbaston, Birmingham 15 England,U.K.
Travers
S
S
Watson
M
M