The book A Manual of Microchemical Analysis was written by author Heinrich Behrens Here you can read free online of A Manual of Microchemical Analysis book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is A Manual of Microchemical Analysis a good or bad book?
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), and treat the dry mass with alcohol. The residue from the alcoholic solution is dissolved in water, and a drop is tested with platinic sulphate ( 61, 62, d). Another drop is tested with starch. A small quantity of nitrite facilitates the appearance of the blue stain of iodine ; a greater quantity will not produce any indication of bro- mine if more than a trace of iodine be present, unless the stain of iodine be destroyed. But, as bromine is set free after iodine, it is often found in the li...quid run off from the blue iodide of starch if this liquid be tested with some grains of starch. If necessary, small additions of hydro- chloric acid and of potassium nitrite also are made. If bromine is not found return to the iodide of starch. It is covered with a thin layer of dilute hydrochloric acid, and a grain of potassium chlorate is added. The starch is bleached if no bromine is present ; if bromine is present the colour of the starch is changed to yellow or orange, which resists the bleaching influence of chlorine for a long time.
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