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acetic acid added adulteration alcohol aldehyde alkaline alkaloids ammonia ammonium amount apparatus barium boiling boric acid bromine butter c.c. of water calcium calcium tartrate carbonate cent Chem Chemical chloride coli colour containing cooled copper cream of tartar crucible Detection determined dilute dissolved distilled dried Estimation ether evaporated examination excess experiments extract fatty acids filtered filtrate flask formaldehyde formalin gelatin grammes heated Hehner hydrochloric acid hydrogen ignited insoluble iodide iodine iodine number iron liquid litre matter metal method milk minutes mixed mixture molybdate neutral nitric acid nitrogen obtained organisms oxide oxygen paper percentage permanganate peroxide phosphate phosphoric acid platinum potash potassium precipitate present Public Analysts pure quantity reaction reagent residue resin salt sample saponification Society of Public sodium soluble solution specific gravity starch stearic acid substance sulphate sulphide sulphuric acid tartrate temperature titrated tube volume washed water-bath weighed yellow Zeit zinc