About Us | Help Videos | Contact Us | Subscriptions
 

Abstract

 

This article in SSSAJ

  1. Vol. 22 No. 5, p. 399-402
     
    Received: Jan 31, 1958


 View
 Download
 Alerts
 Permissions
 Share

doi:10.2136/sssaj1958.03615995002200050009x

Separation and Determination of Total Copper and Zinc in Soils1

  1. P. F. Pratt and
  2. G. R. Bradford2

Abstract

Abstract

Procedures for the anion-exchange separation of Cu and Zn from each other and from other elements, including Fe, are described. An aliquot of soil extract containing Fe in the ferric form and sufficient HCl to make 3M HCl is added to the resin columns, and the columns are washed with 3M HCl to remove ions that do not form or that form weak negative chloride complexes in HCl. The Cu is then eluted with 3M HCl. Ferric-Fe, which moves slowly in the 3M HCl, is eluted with 1M HCl, after which the Zn is eluted with 0.001M HCl. The Cu and Zn are determined colorimetrically by the use of zincon (2-carboxy-2'-hydroxy-5'-sulfoformazylbenzene).

The separation and determination of Cu and Zn by these procedures give values in good agreement with dithizone extractions and determinations. The advantages of the new procedures are their simplicity and rapidity. Digestion with HClO4 does not completely dissolve Zn from soil samples.

  Please view the pdf by using the Full Text (PDF) link under 'View' to the left.

Copyright © . Soil Science Society of America