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The effects of different packaging materials, temperatures and water activities to control aflatoxin B1 production by Aspergillus flavus and A. parasiticus in stored peanuts

Authors
  • John, Joshua Mark1
  • Jinap, Selamat1, 2
  • Hanani, Zainal Abedin Nur1
  • Nor-Khaizura, Mahmud Ab Rashid1
  • Samsudin, Nik Iskandar Putra1, 2
  • 1 Universiti Putra Malaysia, Department of Food Science, Faculty of Food Science and Technology, Serdang, Selangor, 43400, Malaysia , Serdang (Malaysia)
  • 2 Institute of Tropical Agriculture and Food Security (ITAFoS), Universiti Putra Malaysia, Laboratory of Food Safety and Food Integrity (FOSFI), Serdang, Selangor, 43400, Malaysia , Serdang (Malaysia)
Type
Published Article
Journal
Journal of Food Science and Technology
Publisher
Springer India
Publication Date
May 16, 2019
Volume
56
Issue
6
Pages
3145–3150
Identifiers
DOI: 10.1007/s13197-019-03652-6
Source
Springer Nature
Keywords
License
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Abstract

Aflatoxins (AFs) are secondary metabolites produced by aflatoxigenic strains of Aspergillus flavus and A. parasiticus, the most toxic being aflatoxin B1 (AFB1). The purpose of the present work was to investigate the effects of industrial-grade packaging materials (low-density polyethylene, polypropylene, polyethylene-laminated aluminium); temperatures (25 °C, 30 °C); and water activities (0.74 aw, 0.85 aw) on AFB1 production by A. flavus and A. parasiticus in stored peanut kernels. Commercially-obtained samples were segregated into packaging materials, separately inoculated with the aflatoxigenic Aspergillus spp., and stored for 1 month under various °C + aw regimes. AFB1 production was quantified by high performance liquid chromatography with fluorescence detector (HPLC–FLD). For A. flavus in PELA, no AFB1 was detected (100% reduction) at 25 °C for both aw tested. For A. parasiticus in PELA, no AFB1 was detected at 25 °C (0.85 aw) and 30 °C (0.74 aw). Highest concentration of AFB1 was detected in LDPE for both A. flavus (46.41 ppb) and A. parasiticus (414.42 ppb), followed by PP (A. flavus 24.29 ppb; A. parasiticus 386.73 ppb). In conclusion, storing peanut kernels in PELA in a dry place at room temperature has been demonstrated as an adequate and inexpensive method in inhibiting growth of Aspergillus spp. and lowering AFB1 contamination in peanuts.

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