TY - JOUR
T1 - Zinc/Chromium (II) reduction for nitrate determination in agricultural materials by colorimetry or ion‐selective electrode
AU - Hepher, Michael J.
AU - Alexander, Ronald H.
AU - Dixon, James
PY - 1989
Y1 - 1989
N2 - To phase analytical pathways within this laboratory, recent approaches to nitrate analysis have been studied; of particular interest were the U V spectrophotometric approach (Heanes 1982, 1986) and zinc/chromium (II) reduction procedure (Pruden et al 1985). By combining and modifying various aspects of the aforementioned procedures with an adaption of an indophenol blue colorimetric procedure (Mitchell 1972) it was possible to measure nitrate‐nitrogen 0.10‐8.00 g kg−1 DM routinely on a range of agricultural materials (at present hays, straws, grasses, calabrese, potato leaves, cereals, soils and perlites) on a sophisticated high‐volume‐throughput microprocessor‐controlled auto‐sampler/spectrophotometric system.
AB - To phase analytical pathways within this laboratory, recent approaches to nitrate analysis have been studied; of particular interest were the U V spectrophotometric approach (Heanes 1982, 1986) and zinc/chromium (II) reduction procedure (Pruden et al 1985). By combining and modifying various aspects of the aforementioned procedures with an adaption of an indophenol blue colorimetric procedure (Mitchell 1972) it was possible to measure nitrate‐nitrogen 0.10‐8.00 g kg−1 DM routinely on a range of agricultural materials (at present hays, straws, grasses, calabrese, potato leaves, cereals, soils and perlites) on a sophisticated high‐volume‐throughput microprocessor‐controlled auto‐sampler/spectrophotometric system.
KW - agricultural samples
KW - colorimetry
KW - ion‐selective electrode
KW - Nitrate
KW - zinc/chromium II reduction
UR - http://www.scopus.com/inward/record.url?scp=84986817177&partnerID=8YFLogxK
U2 - 10.1002/jsfa.2740490313
DO - 10.1002/jsfa.2740490313
M3 - Article
AN - SCOPUS:84986817177
SN - 0022-5142
VL - 49
SP - 379
EP - 383
JO - Journal of the Science of Food and Agriculture
JF - Journal of the Science of Food and Agriculture
IS - 3
ER -