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Suggested spectrophotometric methods for grading green soybean oil
Author(s) -
Melvin Eugene H.,
Macmillan Duncan,
Senti Frederic R.
Publication year - 1953
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02638327
Subject(s) - optical density , detection limit , analytical chemistry (journal) , crude oil , materials science , chemistry , chromatography , optics , physics , petroleum engineering , engineering
Summary Possible spectrophotometric methods which could replace the present system of grading crude green soybean oils are given below in order of convenience. The limits are approximate values. Measurement of optical density of crude oils at 700 mμ in 21.8‐mm. tubes. Grade 2 limits would be at optical densities of 0.5 and 0.7 Measurement of refined oils at 690 mμ in 21.8‐mm. tubes. The limits for Grade 2 would be at optical densities of 0.4 and 0.6. Measurement of refined oil at 670 mμ in 8.0‐mm. tubes. Limits would be at optical densities of 0.4 and 0.6. Measurement of refined and bleached oils at 670 mμ in 21.8‐mm. tubes. Limits would be at optical densities of 0.1 and 0.7. Measurement of optical density of crude oils at 670 mμ in approximately 4‐mm. I.D. tubes. Limits would be at optical densities of 0.4 and 0.7. Measurement of optical density at 670 mμ of crude oils in 15% solutions of oil in carbon tetrachloride in 21.8‐mm. tubes. Limits would be at optical densities of 0.5 and 0.7.