Trace elements in Canadian field peas: a grain safety assurance perspective

Area of Science:

• Food Science
• Environmental Chemistry
• Agricultural Science

Background:

• International trade of Canadian field peas necessitates adherence to global food safety standards.
• Trace elements, including toxic ones like cadmium, lead, mercury, and arsenic, are environmental contaminants monitored in food products.
• Establishing baseline data for trace elements in Canadian peas is crucial for regulatory compliance.

Purpose of the Study:

• To conduct a baseline study of trace elements in Canadian field peas.
• To ensure Canadian peas comply with international food safety legislation and standards.
• To assess the levels of specific trace elements (cadmium, lead, mercury, arsenic, selenium) in relation to established Maximum Residue Limits (MRLs).

Main Methods:

• The Canadian Grain Commission performed a baseline study analyzing trace element content in Canadian peas.
• Quantification of cadmium, lead, mercury, arsenic, and selenium using specified analytical methods.
• Comparison of measured trace element levels against MRLs set by international bodies (Codex Alimentarius) and national bodies (PRC).

Main Results:

• Mean total cadmium, arsenic, lead, and mercury levels in Canadian peas were below international MRLs.
• All measured toxic trace element levels were within the limits set by the Food and Agriculture Organization (FAO) and World Health Organization (WHO) in the Codex Alimentarius.
• Mean total selenium content was 0.331 mg kg(-1), with 56% of samples exceeding the People's Republic of China (PRC) MRL of 0.3 mg kg(-1).

Conclusions:

• Canadian field peas meet international food safety standards for toxic trace elements.
• Elevated selenium levels in Canadian peas exceed the PRC's MRL, prompting a review by Chinese authorities.
• Higher selenium content may provide nutritional benefits in regions prone to selenium deficiency.