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This article in SSSAJ

  1. Vol. 31 No. 2, p. 210-211
     
    Received: Sept 16, 1966
    Published: Mar, 1967


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doi:10.2136/sssaj1967.03615995003100020020x

A Rapid Citrate-Dithionite Extractable Iron Procedure1

  1. George G. S. Holmgren2

Abstract

Abstract

A procedure for obtaining iron which is both convenient and reliable is described. The procedure involves shaking the samples overnight in a citrate-dithionite buffer. This is followed by a colorimetric iron determination using orthophenanthroline. The use of an automatic pipette, a flocculating agent, and noncritical quantities of dry reagents facilitates the determination. The results show increased effectiveness and reliability over Kilmer's porcedure for high-iron Oxisols and Ultisols from Puerto Rico.

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