New Insight into Mercury Removal from Fish Meat Using a Single-Component Solution Containing cysteine

Area of Science:

• Food Science
• Analytical Chemistry
• Environmental Science

Background:

• Mercury contamination in fish poses a significant public health risk.
• Current methods for mercury reduction are limited, especially during post-packaging storage.
• Extending the safe consumption period for fish products is a critical challenge.

Purpose of the Study:

• To develop a novel, single-component aqueous method for reducing mercury content in fish meat.
• To investigate the efficacy of cysteine as an active agent for mercury displacement and stabilization.
• To assess the application of this method in active food packaging and purification strategies.

Main Methods:

• Utilizing a single-component aqueous medium with cysteine to displace and stabilize mercury from fish proteins.
• Evaluating the impact of cysteine concentration and fish muscle ratio on mercury removal efficiency.
• Testing the method on canned Albacore tuna and exploring adsorption techniques for purification.

Main Results:

• A 1.2 wt% cysteine solution effectively reduced mercury in canned Albacore tuna by 25-35% within two weeks.
• Mercury removal efficiency is dependent on cysteine concentration and fish muscle ratio.
• Cysteine significantly hindered mercury adsorption onto thiolated silica, impacting purification strategies.

Conclusions:

• The developed cysteine-based method offers a promising approach for reducing mercury in fish meat post-packaging.
• This technique can extend the safe consumption period of fish products.
• Further research is needed to optimize purification methods in conjunction with cysteine treatment.