论文信息 - Automated colorimetric determination of ammonium ions in soil extracts with ‘Technicon AutoAnalyzer II’ equipment

Automated colorimetric determination of ammonium ions in soil extracts with ‘Technicon AutoAnalyzer II’ equipment

Abstract An automated method for the measurement of ammonium ions in Kjeldahl digests and 1M sodium chloride extracts of soils (for the determination of total nitrogen and cation exchange capacity respectively) is described. The method is based on the nitroprusside catalysed indophenol reaction, and using a ‘Technicon AutoAnalyzer II’ analysis rates of 100/h are possible. Results from 50 soils agreed well with results obtained by a standard distillation-titration technique.

P. L. Searle

[1] W. E. Simpson,et al. Determination of ammonium in Kjeldahl digests of crops by an automated procedure , 1971 .

[2] K. F. Baker,et al. The theoretical and practical aspects of electronic timing as one method of increasing the analysis rate on the Technicon AutoAnalyzer I , 1971 .

[3] J. Harwood,et al. Some aspects of the phenol-hypochlorite reaction as applied to ammonia analysis , 1970 .

[4] J. C. Petitclerc,et al. Interference by protein and amines in the determination of ammonia by the isocyanurate method. , 1967, Clinica chimica acta; international journal of clinical chemistry.

[5] J. Reardon,et al. New reactants for the colorimetric determination of ammonia. , 1966, Clinica chimica acta; international journal of clinical chemistry.

[6] J. Varley. Automatic methods for the determination of nitrogen, phosphorus and potassium in plant material , 1966 .