The alkaloid is obtained from an aqueous extract of tobacco by distillation with slaked lime, the distillate being acidified with oxalic acid, concentrated to a syrup and decomposed by potash. [Please select]
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The resinate solution is withdrawn, acidified, and the resin acids collected, dried and weighed. [Please select]
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_Fatty acids_ are detected by the turbidity they produce when the diluted glycerine is acidified. [Please select]
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Fatty acids which are not acidified deliver about 3% of pitch. [Please select]
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By this plan of working more even dyeings can be obtained than by simply entering the goods direct into an acidified dye-liquor. [Please select]
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Prolonged soaking in a hot solution of potassium bichromate which has been acidified with sulphuric acid will often prove useful. [Please select]
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