Bioaccessibility and transformation of cadmium in different tissues of Zhikong scallops (Chlamys farreri) during in vitro gastrointestinal digestion
2023
Zhao, Yanfang | Wu, Jifa | Kang, Xuming | Ding, Haiyan | Sheng, Xiaofeng | Tan, Zhijun
Scallop is well known for its high accumulation of cadmium. The bioaccessibility and speciation of cadmium in different tissues of scallops during gastrointestinal digestion could influence the evaluation of its biological effects and consumption safety in humans. The bioaccessibility of total Cd ranged from 44.0 % (kidney) to 90.2 % (gonad) for different tissues of scallop Chlamys farreri. Steaming decreased the total Cd bioaccessibility in the mantle, gill, gonad, digestive gland and the muscle. During in vitro digestion, the reactive inorganic Cd²⁺ could be detected in the digestive juice of five tissues except for the muscle. Steaming process increased the bioaccessible Cd²⁺ content for the digestive gland, gill and gonad tissues. Based on the bioaccessible total Cd and Cd²⁺ content, the muscle, gonad, and mantle of the steamed scallops are the safe tissues for human consumption according to the scenarios of Cd intake established by WHO and EFSA.
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