Determination of nitrogen in agricultural materials by the nessler reagent. II.—Micro-determinations in Plant Tissue and in Soil Extracts

1954 ◽  
Vol 5 (8) ◽  
pp. 364-369 ◽  
Author(s):  
S. H. Yuen ◽  
A. G. Pollard
Keyword(s):  
Plant Tissue ◽  
Soil Extracts ◽  
Nessler Reagent ◽  
Agricultural Materials

A semi-automated procedure for the determination of iodine in plant tissue and soil extracts

The Analyst ◽  
1975 ◽  
Vol 100 (1191) ◽  
pp. 405 ◽  
Author(s):  
H. van Vliet ◽  
W. D. Basson ◽  
R. G. Böhmer
Keyword(s):  
Plant Tissue ◽  
Soil Extracts

Determination of Aluminum Ion Activity in Soil Extracts

1959 ◽  
Vol 23 (4) ◽  
pp. 266-269 ◽  
Author(s):  
W. L. Lindsay ◽  
Michael Peech ◽  
J. S. Clark
Keyword(s):  
Soil Extracts ◽  
Aluminum Ion ◽  
Ion Activity

Determination of Nitrates in Soil Extracts

1973 ◽  
Vol 37 (4) ◽  
pp. 660-660 ◽  
Author(s):  
C. G. Kowalenko ◽  
L. E. Lowe
Keyword(s):  
Soil Extracts

The determination of urea in soil extracts and related samples—a review

Soil Research ◽  
2004 ◽  
Vol 42 (7) ◽  
pp. 709 ◽  
Author(s):  
David F. Lambert ◽  
John E. Sherwood ◽  
Paul S. Francis
Keyword(s):  
Enzymatic Hydrolysis ◽  
Flow Injection Analysis ◽  
Acidic Solution ◽  
Clinical Applications ◽  
Urease Inhibitors ◽  
Viable Option ◽  
Soil Extracts ◽  
Diacetyl Monoxime ◽  
Hydrolysis Of

Although the dominant methods for the determination of urea in clinical applications incorporate selective enzymatic hydrolysis of urea, the determination of urea in soil extracts is complicated by the presence of urease inhibitors. The spectrophotometric determination of urea with an acidic solution diacetyl monoxime and semicarbazide is a viable option but traditional manual procedures are time-consuming. New variations on these procedures, based on microplates or flow-injection analysis methodologies, allow a far greater number of samples to be analysed with high precision and sensitivity.

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