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本文叙述经过两项实验得到如下结果。 (1) 地下水氡含量测值和扩散瓶水样深线性相关,其订正公式为:ΔRn=0.044H—4.643; (2) 水氡测值受扩散瓶鼓泡孔孔径大小影响,呈非线性变化。对于“四定”水样测定中,脱气效率的高低直接影响着地下水氡含量测值的大小。具有同—V气/V水比值的100ml扩散瓶,因水样深浅或孔径大小不同,脱气效率是不一样的。实验表明,从目前各水氡测点正在使用的扩散瓶抽样对比试验结果看:氡测值随着水样深度的增加而提高,随着孔径的加大而降低,其相对误差分别高达21.76％和12.65％,都远远超过国家地震局规定的“平行样的测定,相对误差不大于5％的要求”。
This article describes the results of the following two experiments. (1) The radon content of groundwater is linearly correlated with the water samples of the diffuser. The revised formula is: ΔRn = 0.044H-4.643; (2) The water radon measurement is nonlinearly influenced by the size of the bubbling pore of the diffuser . For the “four” water samples measured, the level of deaeration efficiency directly affects the groundwater radon content measurement. With the same -V gas / V water ratio 100ml diffusion bottle, due to the depth of water samples or pore size, the efficiency of degassing is not the same. Experiments show that from the current radon measurement point is the use of the diffusion bottle sampling comparative test results: radon measured with the water depth increases, with the increase of the aperture decreases, the relative errors were as high as 21.76% And 12.65%, both far exceed the requirements of the State Seismological Bureau, “the determination of parallel samples, the relative error of not more than 5% of the requirements.”