| Atomic absorption spectrometry （AAS）, inductively coupled plasma atomic emission spectrometry (ICP AES) and ion chromatography (IC) were used for determining the potassium, sodium, calcium and magnesium ions in precipitation.As compared to the detection limit, precision, accuracy and recovery rate, and the determination results of precipitation samples were analyzed by t test. The results showed that, the three methods could meet the requirement of quality control, there was no significant difference among the determination results. Compared with the national standard method of AAS, ICP AES method and IC method were more simple in operation and simultaneous determination of multiple elements were available. |
