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DETERMINATION OF TOTAL AND INORGANIC PHOSPHORUS IN WORT AND BEER
Author(s) -
Essery R. E.
Publication year - 1950
Publication title -
journal of the institute of brewing
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.523
H-Index - 51
eISSN - 2050-0416
pISSN - 0046-9750
DOI - 10.1002/j.2050-0416.1950.tb01520.x
Subject(s) - ashing , chemistry , phosphorus , gravimetric analysis , magnesium , molybdate , yield (engineering) , chromatography , inorganic chemistry , metallurgy , organic chemistry , materials science , physics , quantum mechanics
The gravimetric lead molybdate method for the determination of phosphorus is shown to yield good results for quantities of P 2 O 5 of from 1.5 to 5.5 mgrm. Two mgrm. of P 2 O 5 may be successfully determined in presence of 5.4 mgrm. of silica. Total phosphorus may be successfully determined in artificial beer after dry‐ashing with calcium acetate. Results with artificial wort are consistent but slightly low. In artificial wort and beer, inorganic P 2 O 5 , in concentrations greater than 0–028 per cent., and amounts greater than 2 mgrm. can be satisfactorily determined in presence of phytate phosphorus, after isolation by magnesia mixture. In copper wort and brewed beer, determinations of total and inorganic phosphorus by the lead molybdate method and by a standard colorimetrk method are in satisfactory agreement.