Premium
Effect of Calcium Lactate, 4‐Hexyl Resorcinol and Vacuum Packing on Physico‐chemical, Sensory and Microbiological Qualities of Minimally Processed Litchi ( Litchi chinensis Sonn.)
Author(s) -
Shah Narendra Singh,
Nath Nirankar
Publication year - 2006
Publication title -
international journal of food science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.831
H-Index - 96
eISSN - 1365-2621
pISSN - 0950-5423
DOI - 10.1111/j.1365-2621.2006.01181.x
Subject(s) - aril , browning , chemistry , food science , citric acid , shelf life , calcium , vacuum packing , food spoilage , biology , organic chemistry , bacteria , genetics
Summary Litchi ( Litchi chinensis Sonn.) fruits are very susceptible to pericarp browning which adversely affects consumer acceptability even though the aril portion remains in excellent condition. Litchi arils (litchis) were treated with a solution containing 0–2% (w/v) calcium lactate (CL), 0–0.02% (w/v) 4‐hexyl resorcinol (4‐HR) and 1% potassium sorbate. The pH of solution was adjusted to 4.0 with citric acid. Treated litchis were packed in polystyrene trays, over‐wrapped with polypropylene film, vacuum‐packed (0, 47409.3, 94831.9 Pa) and stored at 4 ± 2 °C. Drip losses, pH, total soluble solids (TSS), sensory attributes and microbiological quality of stored samples were estimated. A four‐factor, three‐level experimental design (D 6 Hokes design) with 19 experiments was chosen. Mathematical models were developed to analyse and predict the effect of CL, 4‐HR, in‐package vacuum and storage time on the responses. TSS, pH and sensory scores decreased significantly ( P 0.01), whereas drip losses and microbial count increased significantly ( P 0.01) with time. Drip loss was significantly ( P 0.1) reduced by addition of CL. 4‐HR prevented browning and changes in colour score during storage were significantly less. Vacuum in packages exerted significant ( P 0.01) effect over pH, TSS, sensory and microbiological qualities of minimally processed litchis.