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acetic acid added adulteration albumin albuminoid alcohol aldehyde alkaline alkaloids ammonia ammonium amount apparatus aqueous barium boiling boric acid bromine butter c.c. of water calcium carbonate casein cent Chem Chemical chloride coli colour containing cooled copper cream crucible Detection determined dilute dissolved distilled dried drops 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 paper percentage peroxide phosphate phosphoric acid platinum potash potassium potassium iodide precipitate present Public Analysts pure quantity reaction reagent residue salt sample saponification Society of Public sodium soluble solution specific gravity starch stearic acid substance sulphate sulphide sulphuric acid temperature titrated tube volume washed water-bath weighed yellow Zeit zinc