The principle of monitoring the anion content in boiler water through measuring hydrogen conductivity in boiler water has been expounded

and an approach to the corresponding relationship between anion(mainly being chlorine ions)and hydrogen conductivity under condition of all volatile treatment(AVT)and of low phosphorate treatment(LPT)being made.Results of study show that the composition of boiler water is relatively simple under condition of AVT

the measurement of chlorine ions by using hydrogen conductivity has higher reliability

and can satisfy the requirements of chemical water treatment inside the boiler;the composition of boiler water is comparatively complex under condition of LPT

and having many affecting factors

the result obtained from using said method may have certain deviation

and suitable correction has to be carried out for the data obtained from calculation.