Potassium Permanganate in the Kjeldahl Method for the Determination of Nitrogen in Organic Substances

Details Potassium Permanganate in the Kjeldahl Method for the Determination of Nitrogen in Organic Substances Potassium Permanganate in the Kjeldahl Method for the Determination of Nitrogen in Organic Substances

Mar 1955

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1955natur.175..513b&link_type=abstract

Nature, Volume 175, Issue 4455, pp. 513-514 (1955).

Computer Science

Scientific paper

AN investigation into the mode of occurrence of nitrogen in coals necessitated devising a suitable method for its determination. The ordinary macro-Kjeldahl method was much improved in speed and reliability by using a mixed selenium-mercury catalyst with the usual potassium sulphate; but even in this case some doubt always existed as to when the conversion of all the combined nitrogen of the substances into ammonia was complete, and whether there might be loss of ammonia during the digestion, which was indeed observed when the temperature was greater than 370° C.

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