Copper ions (Cu2+) are an essential trace element for life. Cupric
ions play animportant role inmany body functions as anenzyme cofactor
and are involved in the formation of red blood cells [1].
However, an excessive uptake of Cu2+ can cause serious health
problems, including ischemic heart disease, kidney disease,
neurodegenerative disease, anemia and bone disorders [2]. Because
of their toxicity, the maximum contamination value of Cu2+ in the
environment and in food was set by several organizations
throughout the world to protect human health. For example, the
United States Environmental Protection Agency (USEPA) issued the
maximum contamination level of Cu2+ in drinking water at
1.30mgL1 [3]. In Thailand, the pollutant control organization
permitted aCu2+ concentration of2.00mg L1 in surfacewater [4]. In
addition, the concentration limit ofCu2+ for exposure fromfoods is in
the range of 1.2–4.2mg copper/day as set by The European Food
Safety Authority (EFSA) [5]. Therefore, the monitoring of Cu2+
contaminants in water, food and the environment is necessary.