Abstract
This invention provides a micro-fluid injecting/separating chip with variable volume and its system, where a conventional micro-channel chip injection system is combined with another fluid converging micro-channel by using driving voltage to converge the fluid so as to form an injection mode with variable volume. As such, the amount of injection may be varied in accordance with the desired testing items, under such a control mode by varying the amount of fluid converged by the driving voltage, so as to effectively eliminate the shortcoming of the conventional micro-fluid chips that only allows fixed feeding volume, thereby significantly enhancing the function and expanding the application fields of the micro-fluid chips.