山西忻州奇村水汞观测干扰因素浅析

为进一步明确山西忻州奇村水汞观测过程中存在的干扰因素，分别对硫酸单一试剂、综合试剂、空气湿度、同一个水样多次观测等项进行了试验。试验表明，现用硫酸及其他试剂的汞污染均不明显，对水汞观测构不成于扰；观测室内空气高湿度对水汞观测有一定干扰，且湿度越大，干扰越强，高湿度导致测值大幅突跳；通常所测的水汞含量实为在鼓泡延续时间及空气流量固定不变特定情况下的相对含量，两者的改变会对测值的可比性产生人为干扰。

Brief Analysis on Interference Factors of the Qicun Water Mercury Observation of Xinzhou, Shanxi

In order to further clarify the interference factors in the Qieun water mercury observation of Xinzhou, Shanxi, experiments of single sulfuric acid reagent, synthetically reagents, air humidity and many times observation for the same water sample are carried out, respectively. The results of the experiments indicate that present sulfuric acid and other reagents can not cause serious contamination to water mercury, so they are not interference factors for water mercury observation. The high air humidity in observation room will produce some interference, the higher humidity, the stronger interference. High air humidity cause large amplitude jump in observation values. Generally, the observation water mercury content is a relative content under the condition that bubbling duration and airflow do not change, so the changes of the two factors wilt produce artificial interference for observation values.