The process of preparation of Fe-Si cores is studied, and the influence of different amounts of insulating compounds addition on magnetic properties of the cores is discussed. The results show that the effective permeability is 71.4 when the amount of insulation is 0.5 wt%. When the content is increased to 2.5 wt%, the DC Bias characteristic becomes the best. When the insulating compounds addition is 2.5 wt%, the sample has the lowest power loss, which is 308.4 mW/cm3 at f=50 kHz and B=50 mT.

Laser induced fluorescence (LIF) detection is one of the main means of Capillary Electrophoresis (CE) chip detection, in which the confocal detecting device is commonly used for its higher sensitivity and signal-to-noise ratio (SNR). Based on confocal LIF detection principle, the confocal laser induced fluorescence detecting system, which could realize the auto focusing, and auto tracking was presented, and it contained the confocal optical system, the microprocessor control system and the computer process system. This device can acquire the fluorescence data by PMT or the chip images by CCD, and 3-dimensional electric moving stage could be controlled to accomplish the auto focusing and auto tracking by image process. The device could detect or observe the CE chip data in real time.