The simmultaneous separation and determination of six kinds of hydrocarbons from C_1 to C_4, such as ethane, propane, propene (propylene), isobtane, n-butane and 1,3-butadiene in which are usually contained LP (Liquefied Petroleum) Gas were attempted by means of gas chromatography. In addition, the separation and determination of hydrocarbons in two kinds of LP Gas bombs on the market and gasses contained in the various tissues of two fatal cases poisoned to death by LP Gas were examined. The results are summarized as folloes :1. Siultaneous separation of six kinds of hydrocarbons and their calibration curves…