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acetic acid acid solution acidified added alcohol alkali ammonia ammonium amount analysis apparatus arsenic B.Sc boiling bromine c.c. of water calcium cane sugar carbon dioxide cent Chem chemical chemistry chemists chloride cobalt colour concentrated containing cooled copper described detection determined dilute dissolved distillate dried drop essential oils Estimation ether ethyl alcohol evaporated examination excess extracted Fehling's solution ferric filtered filtrate flask heated hydrochloric acid hydrogen indicator iodide iodine value lead acetate liquid litre lycopodium magnesium matter mercury method methyl mgrm milk minutes mixed mixture nickel nitric acid nitrogen obtained oxide paper phosphate potassium powder precipitate prepared present proteins reaction reagent reducing residue salicylic acid salts salvarsan sample silver small quantities sodium carbonate sodium hydroxide soluble starch starch grains substance sulphate sulphide sulphuric acid temperature thiosulphate tion titrated treated tube volume volumetric washed weight yeast Zeitsch zinc