Publisher's Synopsis
Excerpt from Abstract Bibliography of the Chemistry, Processing, and Utilization of Rice Bran and Rice Bran Oil
For the qual, detection of these adulterants treatment with I_soln, and washing with water leave them uncolored, while the starch of the brans and.middlings is colored deep blue, Treatment with freshly prepd, 0, l% dimethyl p - phenylenediamine sulfate immediately colors sawdust violet red: rice hulls are colored.more slowly and not as deeply, while brans and.middlings are unaffected: the colors Should be observed not later than 4 - 5 min, after adding the reagent, The modified Leroy reagent (95% ale, 15cc, hqo 15cc, phosphoric acid 20 cc, phloroglucinol lg, ) gives a deep blood red in 1 - 2 min, with sawdust and in 4 - 5 min, with rice hulls (not as deep as with sawdust), For the differentiation between sawdust and rice hulls and their approx, detn, the total ash and 8102 may be detd, the following av, values being used for total ash, Sio and the ratio (10 x ash)/si02, resp; pure bran O,7%, 770 0; white wood sawdust rice hulls l6,35.
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