Abstract
A light scattering instrument capable of routine measurements at angles as low as 9° is described. The reduced scattered intensities can be determined, with use of a vertically polarized incident light, correct to 0.5 ~ 1.0%, unless the scattering of the solution over solvent is less than 10−5 cm−1. The correction for the back reflection of the incident beam can be ignored because the light is absorbed by a glass neutral filter before it reaches a glass–air interface. A sample liquid can be brought to a temperature equilibrium in less than 30 min, and the temperature can be kept constant within ±0.02°C, in the temperature range from 5°C to 100°C. No special optical specification is required in making a cell, and the geometrical correction is simply given by sin−1θ correct to ±0.7%.
© 1970 Optical Society of America
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