This work addresses the need for developing an inexpensive and field portable analytical device for metal ions which would permit the rapid screening and detection of contaminated food or waste materials on site. The detection of metal ions was accomplished using a microchip CE/amperometric detection system, in which screen-printed carbon electrode is placed at the end of channel. This approach simplifies the fabrication of the working electrode and also provides a convenient and sensitive method for the determination of metal ions by amperometry. Furthermore, by simply changing the electrode, we can easily remove or clean the detection electrode, which is prone to contamination. In this manner, we propose an attractive portable device for screening and analyzing a complex system containing different metal species, such as food. The optimization, characterization, and attractive performance characteristics of a microchip CE, and its successful application to complex samples (such as vegetable juices) are reported in the following sections.