It is well known that toxic heavy metals to humans and the environment to contamination of heavy metals in the environment, it is something very close to us. The cause of contamination of heavy metals in natural food from industrial waste. The metal into the environment as a whole, gas, liquid and solid. Some types of metal is a metal body to grow. However, If it gets too much, it should cause poisoning. Some types of accumulated in the body for a long time. Some types will excrete the body, making it difficult to quickly classify all types of metal that is clearly food contaminants or not. Heavy metals and common interest to many developing countries, academics, education, Tin, cadmium, lead, mercury Toxicology include arsenic, copper, zinc and iron. Therefore, the measurement and analysis of heavy metal concentrations are low. Accuracy and the cost per analysis is, therefore, a quantitative analysis is to watch for problems of contamination of heavy metals that will have an impact on humans and the environment by the popular heavy metal analysis techniques are the appropriate resources to the specifications chettiar stump kaaep master (AAS) and Dingo flavor atoms.Miss กอิ partition master, shape, taste, Kochi (AES), which is the analysis of the absorption and emission of light atoms, independent metal respectively. Preparation procedure must be difficult to make the sample we analyze are in solution with metal atoms are independent. In conjunction with advanced analytical tools are expensive and require expertise in the analysis. Electrochemical techniques is another alternative, one can analyse the metals from the electron transport measurements from a redox electrode on the work. With the cost per analysis sample and save time in analysis, because the tools are cheap. Decrease sample preparation steps, or there is a sample preparation step that is not complicated. So researchers have developed the concept of knowledge on chemical modified electrodes in electric comes cheap carbon electrodes from the gut of a pencil lead, heavy metals analysis. Cadmium and zinc in a single analysis.
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