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A modified Jelley refractometer
Author(s) -
Langford Stephen A.
Publication year - 1991
Publication title -
journal of microscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.569
H-Index - 111
eISSN - 1365-2818
pISSN - 0022-2720
DOI - 10.1111/j.1365-2818.1991.tb03184.x
Subject(s) - refractometer , prism , optics , refractive index , materials science , wavelength , distilled water , thermistor , chemistry , physics , chromatography , quantum mechanics
SUMMARY Light beams are read directly (not as virtual images) against a scale erected about 74 cm in front of the prism, with a modified Jelley refractometer. Liquid temperatures are controlled by thermistors placed at each end of the prism trough, which is enclosed in an aluminium block. The scale is calibrated against the refractive index (RI) of distilled water, seven ( sic ) RI estimates for six Cargille liquids related to six glass standards, and the label RIs of ninety‐eight other Cargille liquids. The calibrated refractometer is used accurately and precisely to calibrate ninety‐six Cargille liquids, over the inclusive 1ċ400–1ċ800 (25ċ0°C, 589ċ3 nm, RI unit) label range, at liquid temperatures of 19–49°C and illuminating wavelengths of 435ċ8–694ċ3 nm.