Through Comparison

the accuracy of sodium ions contained in steam measured by using second-order differential flame spectroscopic method

ion chromatographic method

and on-line sodium monitor method has been obtained

at the same time

the measured results by using on-line monitors manufactured from Orion

Swan

and Polymetron Corps being compared.Results show that the on-line sodium monitors can satisfy the requirement for accurately measuring the trace sodium ion contained in steam under condition of ensuring the optimal work condition for said monitors.The measuring accuracy of on-line sodium monitors is affected by the electrode behavior

the flow speed of liquid

the concentration of alkalination agent

and the external interference etc.

hence

cleaning

maintenance

and conservation for said monitors should be periodically carried out.