Practical physiological chemistry : a book designed for use in courses in practical physiological chemistry in schools of medicine and of science . themain solution. Evaporate to 150 , filter and cool the 10 of a 5 per cent solution of barium chloride to thecold filtrate, slowly, drop by The contents of the flaskshould not be stirred or shaken during the addition of thebarium chlride. Allow the mixture to stand at least one hour,then shake up the solution and filter it through a weighedGooch crucible. Manipulate the precipitate of BaS04 accord-ing to directions give
Practical physiological chemistry : a book designed for use in courses in practical physiological chemistry in schools of medicine and of science . themain solution. Evaporate to 150 , filter and cool the 10 of a 5 per cent solution of barium chloride to thecold filtrate, slowly, drop by The contents of the flaskshould not be stirred or shaken during the addition of thebarium chlride. Allow the mixture to stand at least one hour,then shake up the solution and filter it through a weighedGooch crucible. Manipulate the precipitate of BaS04 accord-ing to directions given under Total Sulphates, page 361. Calculate the quantity of sulphur, expressed as S03 or S,present in the twenty-four hour urine specimen. 1 See Shermans Organic Analysis, p. 19. 2 Only a small amount of urine should he added at one time, it beingnecessary to make several evaporations before the block contains sufficienturinary residue to proceed with the combustion. 3 The Berthelot-Atwater apparatus (Fig. 124, page 366) is well adaptedto this purpose. 4 See note (2) at the bottom of page 361. 366 PHYSIOLOGICAL Berthelot-Atwater Bomb Calorimeter. (Cross-sectiox of Apparatus as Ready for Use.)A, Steel cup or bomb proper; C, collar of steel; G, opening through whichoxygen is forced into the bomb ; H and I, insulated wires which serve to conductan electric current for igniting the substance which is held in the small capsule;L, a stirrer which serves to keep the water surrounding the bomb in motion andinsures the equalization of temperature; P, a delicate thermometer which showsthe rise in temperature of the water surrounding the bomb. urine: quantitative analysis. v 7 VIII. Phosphorus. i. Total Phosphates.—Uranium Acetate Method.—To of urine in a small beaker or Erlenmeyer flask add 5 ofa special sodium acetate solution1 and heat the mixture to theboiling-point. From a burette, run into the hot mixture, dropby drop, a standard solution of ura
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