Online measurement method and online measurement device for trace sodium ions in water sample of power station

The invention provides an on-line measurement method and an on-line measurement device for trace sodium ions in a water sample of a power station, and belongs to the technical field of trace ion measurement, the method comprises the following steps: 1) enabling the water sample to sequentially flow through a flowmeter and a constant flow cup, and enabling the flow of the water sample to be constant; (2) adding ammonia into the water sample with constant flow to neutralize H < + > in the water sample so as to alkalify the water sample; and 3) performing electrode measurement on the neutralized water sample, wherein the electrode measurement comprises sodium electrode measurement, temperature electrode measurement and reference electrode measurement. According to the invention, the problem of inaccurate measurement of the sodium ion concentration of the water sample caused by unstable flow can be avoided. 本发明提出了电站水样痕量钠离子在线测量方法及在线测量装置，属于微量离子测量技术领域，其方法步骤为：1)让水样依次流过流量计和恒流杯，使水样的流量恒定；2)向流量恒定的水样中加入氨对水样中的H+进行中和，使水样碱化；