Development of a small-scale heavy metal detection system using pulse-modulated inductively coupled He microplasma combined with micro total analysis system

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Conventional inductively coupled plasma ICP-atomic emission spectroscopy AES with high-gas temperature can detect ppb level heavy metal from environmental samples, such as blood, water, and soil. However, the ICP-AES is large and require complicated environmental sample preparation sequences so that the system cannot be used for the real-time on-site heavy metal detection. In this study, a small-scale ICP was pulse-modulated. The initial peak, produced by the difference in the ramping speed of electron temperature and electron density was used to detect ppb level signal from reference sample. In the second year, a T-shape micro total analysis system(μTAS) was fabricated to collect blood serum from whole blood at high speed. The blood serum collection port was fixed at the width of 15 um while varying the blood cell collection port at 45-90 to obtain the optimum blood flow while preventing the hemolysis.