A wet oxidation procedure suitable for total nitrogen and phosphorus in soil
作者:
A.P. Rowland,
H.M. Grimshaw,
期刊:
Communications in Soil Science and Plant Analysis
(Taylor Available online 1985)
卷期:
Volume 16,
issue 6
页码: 551-560
ISSN:0010-3624
年代: 1985
DOI:10.1080/00103628509367628
出版商: Taylor & Francis Group
关键词: Soil digestion;wet oxidation;nitrogen;phosphorus;AutoAnalyzer
数据来源: Taylor
摘要:
A wet oxidation digestion previously developed for plant material has now been evaluated for a range of British soil types. The traditional Kjeldahl procedure using sulphuric acid, salt and catalyst was modified to include hydrogen peroxide as an additional oxidant. The method is suitable for estimating both nitrogen and phosphorus in soil and overcomes the need for separate digestion procedures for these elements. It compared favourably with a normal Kjeldahl method for nitrogen and with a mixed acid oxidation system for phosphorus and recovery was complete after two hours. Total phosphorus and organic nitrogen were recovered together with labile ammonium‐nitrogen. Nitrate‐nitrogen would require a further modification and the recovery of ‘fixed’ lattice ammonium‐nitrogen was not assessed. Samples had to be finely ground to achieve good precision and recovery.
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