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- W956969891 abstract "1-Hydroxyethylidene-1, 1-diphosphonic acid (HEDP) is usually used as a scale and corrosion inhibitor in recycle-cooling water for steel industry. The quick and accurate analysis of HEDP concentration in water is of importance to control the inhibitor adding program. However, the common method for HEDP analysis, which determines the total phosphate in water samples, may suffer the serious problem of incorrectly including degraded HEDP as the active HEDP reagent. In this study, the method of the determination of HEDP in recycle-cooling water by ion chromatography was investigated. The chromatographic parameters, including elution and detection, were optimized. The separation was achieved on an IonPac AS14A column with NaOH solution of 80mmol/L as the eluent at a flow rate of 1.0mL/min, and the detection was performed by a suppressed conductivity detection mode with the injection volume of 25µL. The method showed good linearity within the range of 0.25 and 0.5mg/L with an average recovery of 102%. The detection limit of the method reached as low as 0.1mg/L. The relative standard deviations for 0.25 and 0.5mg/L HEDP standard solutions were 4. 7% and 3.5% (n=13), respectively. The method has been applied for the determination of HEDP in recycle-cooling water samples with the advantages of being simple, fast, sensitive, and interference free." @default.
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- W956969891 date "2007-03-01" @default.
- W956969891 modified "2023-09-24" @default.
- W956969891 title "离子色谱法测定循环冷却水中的羟基－1,1-亚乙基二磷酸" @default.
- W956969891 hasPublicationYear "2007" @default.
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