Soil mercury vapor measuring instrument

The utility model relates to a soil mercury vapor measuring instrument which comprises a conical spiral sampler, a filter, a nanocarbon gold saving mercury pipe and an air pump, wherein an opening is formed in the tip of the conical spiral sampler, and the conical spiral sampler can downwards stretch into soil; the nanocarbon gold saving mercury pipe comprises a glass tube, carbon gold particles and glass sand; the carbon gold particles are positioned in the middle inside the glass tube; and two ends of the carbon gold particles in the glass tube are blocked by the glass sand. The soil mercury vapor measuring instrument is high in sensitivity and high in stability and can be infinitely recycled, the amount of the needed gold is small, the manufacturing materials and manufacturing process are simple, the measuring instrument is suitable for large-scale batch production, the yield of products in each batch is close to 90 percent, the production cost is greatly reduced, and large-scale popularization and applica