The invention relates to a device for quantitatively analyzing total mercury of
atmosphere /
smoke based on a low-temperature
plasma. The device comprises a thermocatalytic reactor (1), a gold amalgam enrichment device (2), a low-temperature
plasma excitation source (3) and a
spectrometer (5), which keeps in communication through a
quartz tube, wherein the
spectrometer (5) connected with the low-temperature
plasma excitation source (3) through an
optical fiber probe. The thermocatalytic reactor is contacted with air /
smoke completely to convert Hg<2+> into Hg<0>. A certain amount of surface gold-plating
quartz sand is filled in a gold amalgam enrichment
pipe and can completely adsorb the Hg<0> in the gas at a normal temperature. High-purity Ar filled into the excitation source is excited by high-frequency high-
voltage electricity applied to a
ceramic pipe by a
neon lamp power supply to form the low-temperature plasma with a large amount of high-density high-energy electrons. The plasma further excites the Hg<0> vapor, so that the 253.7-nm characteristic excitation
spectral line is transmitted. The
spectrometer records the intensity of the characteristic
spectral line and establishes a
linear model based on the intensity of the
spectral line and the Hg<0> concentration so as to calculate to obtain the Hg<0> content of the
atmosphere /
smoke.