Field Test for Dissolved Ferrous Iron

2001 ◽  
pp. 188-189
Keyword(s):  
Field Test ◽  
Ferrous Iron

Field tests for ferrous iron and ferric-organic complexes (on exchange sites or in water-soluble forms) in soils

Soil Research ◽  
1981 ◽  
Vol 19 (2) ◽  
pp. 175 ◽  
Author(s):  
CW Childs
Keyword(s):  
Soil Sample ◽  
Field Test ◽  
Ferrous Iron ◽  
Ammonium Acetate ◽  
Field Tests ◽  
Water Soluble ◽  
Organic Ligands ◽  
The Other ◽  
Positive Test ◽  
Organic Complexes

A 1 M solution of ammonium acetate containing �, �-dipyridyl indicator is recommended for use in field tests for exchangeable and water-soluble ferrous iron in soils. In using the test, a soil sample may be added to a vial containing the solution, or the solution can be sprayed on to a freshly exposed soil face. A field test for ferric-organic complexes in soils, using the same vials, is proposed. This is based on the photochemical nature of the reduction of ferric to ferrous iron in the presence of oxidizable organic ligands. Two subsamples of soil are added to separate vials, and light is excluded from one. After 5-15 min, a positive test for ferrous iron in the vial exposed to light, and a negative test in the other, indicates the presence of ferric-organic complexes.

A modification of Childs' field test for ferrous iron and ferric-organic complexes in soils.

Soil Research ◽  
1982 ◽  
Vol 20 (3) ◽  
pp. 261 ◽  
Author(s):  
JA Kennedy ◽  
HKJ Powell ◽  
JM White
Keyword(s):  
Field Test ◽  
Ferrous Iron ◽  
Nitrilotriacetic Acid ◽  
Water Soluble ◽  
Organic Species ◽  
Organic Complexes

A modification to Childs' field test for water-soluble and exchangeable ferrous iron in soils is described. To prevent redox decomposition of ferric-organic species, which is induced by the reagent �,�' -dipyridyl, a mixed NTA (nitrilotriacetic acid)-�,�-dipyridyl reagent at pH 7 is recommended.

Field test for environmental correlates of dispersal in hedgehogs Erinaceus europaeus

2001 ◽  
Vol 70 (1) ◽  
pp. 33-46 ◽  
Author(s):  
Doncaster C. Patrick ◽  
Rondinini Carlo ◽  
Johnson Paul C. D.
Keyword(s):  
Field Test ◽  
Erinaceus Europaeus ◽  
Environmental Correlates

Experimental field test of proposed pedestrian safety messages: Volume II: Child messages

1983 ◽  
Author(s):  
Richard D. Blomberg ◽  
David F. Preusser ◽  
Allen Hale ◽  
William A. Leaf
Keyword(s):  
Field Test ◽  
Pedestrian Safety ◽  
Experimental Field
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