Abstract：In this paper, the conductivities of double-distilled water and aqueous solution of NaCl, HOAc, C_5H_5N, etc. were determined in an elongated time period. It is found that the conductivity values of the solutions at certain temperature are not constant and change over time. On a large time scale, the variation trajectories can be divided into two groups. The one is that the conductivities increase with time increase, known as "water type trajectory"; and in the other the conductivities decrease with time increase, known as "pyridine type trajectory". Contrast experiments showed that the "water type trajectory" would be obtained with the promoter of water structure, and "pyridine type trajectory" would be obtained with damager of water structure. They would be related to the strength of electromagnetic field radiation in natural surroundings.
鲁传华,贾勇,李全,张菊生. 封闭体系中水溶液导电行为随时间变化规律的研究[J]. 化学学报, 2002, 60(9): 1619-1623.
Lu Chuanhua;Jia Yong;Li Quan;Zhang Jusheng. Study on Conductivity Change of Aqueous Solutions over Time in Closed System. Acta Chimica Sinica, 2002, 60(9): 1619-1623.