HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Dick, W. A. Articles by Tabatabai, M. A. Search for Related Content PubMed Articles by Dick, W. A. Articles by Tabatabai, M. A. Agricola Articles by Dick, W. A. Articles by Tabatabai, M. A.

Sodium Hypobromite Oxidation Method for Determination of Total Phosphorus in Plant Materials¹

A simple, sensitive, precise, and rapid method for determination of total P in plant materials is described. The sample is heated with alkaline sodium hypobromite solution to oxidize the P compounds to phosphate, and the phosphate thus obtained is extracted with 1N H₂SO₄ and determined colorimetrically by a heteropoly blue color method. Comparison of results obtained by the hypobromite oxidation and HNO₃-HCIO₄ digestion procedures showed that the average total P values by the two methods for 20 plant samples and animal manures analyzed were 0.385 and 0.384%, respectively. In addition to being safe, digestion of plant samples with sodium hypobromite solution and colorimetric determination of the extracted P by the method of Murphy and Riley permits 100 analyses to be performed by a single operator in a normal working day.

Key Words: HNO₃-HCIO₄ • digestion • Heteropoly blue color • Plant analysis • Animal manures

² Assistant professor of agronomy, OARDC, Wooster, Ohio, and professor of agronomy, Iowa State Univ., Ames.

Received for publication April 8, 1981.