Emmett and Grindley's method does not give high enough results for organic phosphorus in cold water extracts of flesh, as the heat of coagulation has changed nearly all of the organic phosphorus to the inorganic form.Barium chloride in slightly ammoniacal solution precipitates the inorganic phosphorus from water extracts of flesh and gives a satisfactorily accurate separation of the inorganic from the organic form.There seems to be a progressive splitting up of the organic phosphorus compounds in beef flesh during the process of cooking so that in well done meats practically all the phosphorus is present in the inorganic form.A study of the tables shows considerable variation in the relative amounts of soluble and soluble organic phosphorus in different cuts and in different animals.Extremes will be noted in rib of Jerry (a fat show steer) in which 91.44 per cent, of the soluble phosphorus is organic and in composite of 592 (an extremely emaciated steer) where only 26.02 per cent, or the soluble phosphorus is organic. This subject is being investigated further.
The well known Weende method1 for determining crude fiber has been subjected to criticism by many chemists.The chief trouble seems to be with the filtering materials, linen, asbestos, or glasswool, which vary in their physical characteristics and, necessarily, in filtering efficiency. In a number of laboratories it has been the practice to use linen cloth for filtering. The cloth has been used in the same manner as
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