TY - JOUR
T1 - Colorimetric determination of iron in beer by flow injection analysis using the merging zones technique
AU - Fernandes, Silvia M. V.
AU - Rangel, António O. S. S.
AU - Lima, José L. F. C.
PY - 1995/1/1
Y1 - 1995/1/1
N2 - A flow injection analysis system with colorimetric detection for the iron determination in beer is described. The methodology is based on the formation of a complex produced by the reaction of iron (II) with 1,10‐phenanthroline, after reduction of iron (III) to iron (II) by ascorbic acid. The asymmetric merging zones technique was used to allow the sequential blank and sample absorbance readings. The results obtained with the developed system were in good agreement with those provided by the reference method (relative deviations lower than 4%) and exhibited a precision (relative standard deviation) better than 7%. A sampling‐rate of 60 determinations per hour can be achieved. 1995 The Institute of Brewing & Distilling
AB - A flow injection analysis system with colorimetric detection for the iron determination in beer is described. The methodology is based on the formation of a complex produced by the reaction of iron (II) with 1,10‐phenanthroline, after reduction of iron (III) to iron (II) by ascorbic acid. The asymmetric merging zones technique was used to allow the sequential blank and sample absorbance readings. The results obtained with the developed system were in good agreement with those provided by the reference method (relative deviations lower than 4%) and exhibited a precision (relative standard deviation) better than 7%. A sampling‐rate of 60 determinations per hour can be achieved. 1995 The Institute of Brewing & Distilling
KW - Beer
KW - Colorimetric iron determination
KW - Flow injection analysis
KW - Merging zones
UR - http://www.scopus.com/inward/record.url?scp=84987321996&partnerID=8YFLogxK
U2 - 10.1002/j.2050-0416.1995.tb00868.x
DO - 10.1002/j.2050-0416.1995.tb00868.x
M3 - Article
AN - SCOPUS:84987321996
SN - 0046-9750
VL - 101
SP - 281
EP - 284
JO - Journal of the Institute of Brewing
JF - Journal of the Institute of Brewing
IS - 4
ER -