Through comparison of geogas's blank and sample for different mediums, it is concluded that highly purified liquid capture medium with certain concentration is effective for collection of geogas's samples, which has the advantages of low background, easy operation, and simple analytical procedure. Different mediums have different capture capabilities for different elements. For example, the capture capability of aqua regia is stronger than that of nitric acid for Au, Ag, Cu, Zn. Poly-plastic has some advantage to adhere Au. Therefore, suitable medium and or conjugating use of two mediums should be considered on the basis of type of concerned mineral deposits henceforth.