利用释放六氟化硫SF_6研究大气污染扩散规律,可以获得大量可靠的科学依据。我们从1984年10月至1985年6月在本溪市某地150米高处,在三种气象条件下,向下风五公里范围内释放了十多次SF_6,采样后用气相色谱分析,取得了上千个数据。实验结果表明,在不冷冻浓集的条件下,直接进样1ml,检出下限可达1×10~(-12)～5×10~(-12)(体 The release of sulfur hexafluoride SF_6 to study the law of air pollution diffusion, can obtain a large number of reliable scientific basis. From October 1984 to June 1985, at a height of 150 meters somewhere in Benxi City, we released more than ten times of SF_6 within a range of five kilometers to the downwind under three kinds of weather conditions. After sampling, we analyzed by gas chromatography Thousands of data. The experimental results showed that under the condition of no freezing concentration, 1ml direct injection could detect the lower limit of 1 × 10 ~ (-12) ~ 5 × 10 ~ (-12)