Detection Methods on Line of Total Water-hardness in Industry

The flow injection technique is applied to the analysis of total water-hardness,and the related factors were studied within a variety of experimental conditions.Using 0.02mol / L EDTA concentration,the detection range could well meet the requirements of national standard 5 to 1000 mg range,and thus our analytical method can be well used to live determination of total water-hardness in steel mill production water,boiler water,etc.