Comparison of Conventional and Automated Procedures for Nitrogen, Phosphorus, and Potassium Analysis of Plant Material Using a Single Digestion
摘要：
Nitrogen content in 10 plant samples of widely varying concentrations of N, P, and K was measured by a HSO—HOashing procedure and the AutoAnalyzer system and found comparable to nitrogen content obtained by conventional Kjeldahl analysis. Phosphorus content measured by the AutoAnalyzer system on the same HSO-HOashing was similar to that obtained by dry-ashing combined with the molybdo-vanadate procedure. Potassium analyses on the solutions from the two ashing procedures by atomic absorption spectroscopy were comparable. Details are presented for simultaneous N and P analysis by the AutoAnalyzer and for K analysis by atomic absorption on plant material performed on a single HSO-HOdigest at a rate of 160 samples per week by one technician.
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DOI：
10.2134/agronj1967.00021962005900030010x
被引量：
年份：
1967
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