Open AccessOxidative stability of direct‐expanded chickpea–sorghum snacks
Author(s) -
Bekele Esayas K.,
Nosworthy Matthew G.,
Henry Carol J.,
Shand Phyllis J.,
Tyler Robert T.
Publication year - 2020
Publication title -
food science and nutrition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.614
H-Index - 27
ISSN - 2048-7177
DOI - 10.1002/fsn3.1731
Subject(s) - flavor , sorghum , food science , shelf life , aroma , chemistry , peroxide value , peroxide , horticulture , agronomy , biology , organic chemistry
In contrast to other pulses, chickpea has a relatively high fat content (3%–10%). This study was designed to investigate direct‐expanded chickpea–sorghum extruded snacks (50:50, 60:40, and 70:30 chickpea:sorghum, w/w) with respect to: their oxidative stability and sensory properties during accelerated (55°C) and room temperature (25°C) storage; correlations between chemical markers (peroxide value and p ‐anisidine value) and sensory data during accelerated storage; and the shelf‐life of snacks extruded at the optimal expansion point as determined by a rotatable central composite design. Peroxide values and p ‐anisidine values were in the range of 0–2.5 mEq/Kg and 5–30, respectively, for both accelerated and room temperature storage, and increased during storage ( p < .05). 70:30 and 60:40 (w/w) chickpea–sorghum snacks had higher peroxide and p ‐anisidine values compared to the 50:50 snack during storage at either temperature ( p < .05). Rancid aroma and off‐flavor of 60:40 and 70:30 chickpea–sorghum snacks (slightly intense = 6) also were higher than that of the 50:50 snack (moderately weak = 3) ( p < .05). Significant correlations ( p < .05) were found between chemical markers and sensory attributes ( p < .05). The study illustrated that shelf‐life decreased as the percentage of chickpea in the blend increased. Therefore, in terms of shelf‐life, a 50:50 chickpea–sorghum blend is preferable.