Nitrate Determination by a Modified Conway Microdiffusion Method

Stanford, George and Carter, J.N. and Simpson Jr, Elmer C. and Schwaninger, Daniel E. (1973) Nitrate Determination by a Modified Conway Microdiffusion Method. Journal of the Association of Official Analytical Chemists. 56(6):1365-1368.

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Abstract

The proposed modified Conway microdiffusion
method provides for consecutive determinations
of NH₄- and NO₃-N in a given
aliquot of soil extract. Analyses of primary
nitrate standards showed essentially complete
recovery in the range of 1 to 20 ppm NO₃-N
(4 to 80 µg N/aliquot). Results for (NH₄ +
NO₃)-N and NO₃-N in soil extracts are comparable
to those obtained, respectively, by
macrodistillation with Devarda's alloy and by
the phenoldisulfonic acid colorimetric method.
The method is rapid and suitable for routine
analyses of soil extracts, the equipment is
inexpensive, and no interferences are apparent.

Item Type:	Article
NWISRL Publication Number:	0292
Subjects:	Research methodology Mass Import - autoclassified (may be erroneous)
Depositing User:	Dan Stieneke
Date Deposited:	20 Nov 2010 21:51
Last Modified:	15 Feb 2017 23:20
Item ID:	263
URI:	https://eprints.nwisrl.ars.usda.gov/id/eprint/263