Apparatus and method for low temperature plasma body atomic emission spectra measuring trace quantity hydrargyrum

A device and a method for detecting a trace of mercury in emission band spectrum of low temperature plasm, which belongs to an analysis and detection technology filed and includes the flowing steps that: (1) detection wavelength and background correction wavelength of the mercury are chosen; (2) a standard working curve of the mercury is drawn; (3) mercury content of solution which is to be detected is detected; the device used in the method for detecting a trace of mercury in emission band spectrum of low temperature plasm includes gasoline fractionating sample injection system, low temperature plasm generator, high-frequency and high-voltage power supply and spectrograph. The invention has beneficial effects that: medium can prevent exoelectric low temperature plasm exciting light resource, high temperature condition is not existed, power consumption is greatly decreased , and then an energy supply system is simple, cost is cheap, daily running consumption is quite low.