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Analysis of Vegetable Tanning MaterialsGeneral
VEGETABLE TANNED LEATHERS
Total Nitrogen and Hide Substance
8 other sections not shown
1.1 This method 2.1 The specimen A. L. C. A. Provisional Method A.L.C.A. Provisional Method accordance with Method ALCA Provisional Method alcohol aliquot alkalinity ammonia ammonium ammonium hydroxide APPARATUS 3.1 APPARATUS AND REAGENTS approximately beaker boiling calculated as follows chloride chromic oxide clamp color containing cooled crucible described in Method desiccator determined dextrose diameter diluted distilled water evaporated extract ﬁlter paper ﬁltrate ﬁnish ﬁrst ﬂame ﬂask glass grams heat hide powder hydrochloric acid inch leather mandrel measured Method April 1953 Method February 1954 method is intended methyl orange milligrams minutes mixed mixture moisture nearest 0.1 nitrogen nontannins oven petroleum ether phenolphthalein pipetted potassium PROCEDURE 4.1 Provisional Method April Provisional Method February REAGENTS 3.1 residue RESULTS 5.1 SCOPE sodium hydroxide solution SPECIMEN 2.1 specimen shall consist standard sufﬁcient Sulfated Oils sulfonated sulfuric acid tannin temperature test jar thermometer thickness titration tube unsaponiﬁable volatile washed weight