A Rapid Citrate-Dithionite Extractable Iron Procedure1
- George G. S. Holmgren2
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.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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