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根据研究预测预报地震工作的需要,我们试验用离子选择性电极测定了北京地区深井水中的氟、氯、溴、碘、钾、钠、钙、镁等离子以及硫酸根、水硬度测量的精密度及回收率均较满意。此法快速简便,适合现场测定,现将方法及结果简要报告如下。一、测定方法 1.氟离子的测定,采用标准加入法。用CSB—F—1型氟离子电极(长沙半导体材料厂),参比电极为自制的AgI/Ag_2S固态膜碘离子电极。测量步骤为:先用浓度相差10倍的氟校准溶液校准电极斜率(每100毫升溶液中加入TlSAB(总离子
According to the need of studying and forecasting earthquake work, we tested the precision of the determination of fluorine, chlorine, bromine, iodine, potassium, sodium, calcium, magnesium ions and sulfate and water hardness in deep well water in Beijing by using ion selective electrode. Recoveries are more satisfactory. This method is fast and easy, suitable for on-site determination, the methods and results are briefly reported as follows. First, the determination of 1. Fluoride determination, using standard addition method. CSB-F-1 fluoride ion electrode (Changsha Semiconductor Materials Factory), the reference electrode for the homemade AgI / Ag_2S solid-state membrane iodine ion electrode. The measurement procedure is as follows: First, calibrate the electrode slope with a fluorine calibration solution 10 times the difference in concentration (add TlSAB per 100 ml of solution