壤中气CO2现场累积测定方法的初步研究

本文介绍了一种CO₂现场累积测定的新方法,其工作原理是,吸附有百里酚酞的兰色氧化铝,与CO₂作用后,活性氧化铝由兰变白。将上述原理制成的CO₂测定管,埋于深约50cm的松散层中24小时后,根据测定管变色部分的长度来测定壤中气内CO₂的含量。这种方法在两个地区进行了试验,在已知断裂带上均有明显的异常反映。

A PRELIMINARY STUDY ON IN-SITU SOIL GASEOUS CO2 ACCUMULATIVE DETERMINATION

This paper presents a new method for in-situ CO₂ accumulative determina tion, whose operating principle is that, after the reaction of CO₂ to blue alumina adsorbed with thymol phenolphthalein, the activated alumina changes from blue to white in colour. The CO₂-determining tube produced on this principle is buried in the loose layer about 50cm in thickness for 24 hours, then the CO₂ content of soil gas is determined according to the length of discoloured portion of the tube. This method was experimentally used in two areas, which yielded distinct anomalies over the known fault zones.