A Study on the Detection and Quantification of Heavy Metals (As, Pb, Cd, Cr, and Ni) and Toxins in Rice-Bran and Its Related Products

Abstract

The purpose of this study was to examine the impact of heavy metals and toxins on rice bran-related industrial products, including rice bran (RB), rice bran oil (RBO), and deoiled rice bran (DORB). For the RB, RBO, and DORB samples, aflatoxins (B1, B2, G1, and G2), as well as heavy metals including As, Pb, Cd, Cr, and Ni, as well as bacterial and fungal loads of yeast, molds, and toxins, were examined. RB and DORB samples were found positive for bacteria, yeast, and mold populations and aflatoxin B1 for fresh (0), 7, 14, and 21 days after storage at ambient temperature. RB and DORB samples for 28 days after storage found lower loads in bacteria, yeast, and mold but were completely negative for aflatoxin B1. We have examined all the above-mentioned quality parameters for RBO and found them negative for bacteria, yeast, mold load, and even aflatoxin B1. Since RB products that are stored for a long period of time develop toxins, feed manufacturers need to be more careful when handling RB and DORB as plant energy sources. Both raw and refined RBO are safer for the Bangladeshi population because they don't contain any toxins or heavy metals.