Fast Determination of Hexafluorophosphate, Fluorid, Chloride, Nitrate and Sulfate Inorganic Anions by Ion Chromatography with Valve Switching Fast Determination of Hexafluorophosphate, Fluorid, Chloride, Nitrate and Sulfate Inorganic Anions by Ion Chromatography with Valve Switching

• Published in: Fēnxī huàxué Vol. 39; no. 11; pp. 1738 - 1742
• Main Authors: Zhu, Zuo-Yi, Xu, Jin-Gang, Zhong, Nai-Fei, Zhang, Pei-Min, Zhu, Yan
• Format: Journal Article
• Language: English
• Published: 01.11.2011
• Subjects: Anion exchanging; Anions; Guards; Mathematical analysis; Separation; Standard deviation; Switching; Valves
• ISSN: 0253-3820
• DOI: 10.3724/SP.J.1096.2011.01738

A new method has been proposed for fast determination of hexafluorophosphate (PF6-) and some inorganic anions (F(-), Cl(-), NO(3)(-), SO(4)(2-)). It was accomplished by valve switching between anion exchange guard column and separation column connected in series. With strong retentive ion (PF(6)(-)) only through guard column and the inorganic anions through both guard column and separation column, the separation was completed within a much shorter time. Under the optimum conditions, the linear ranges of the method for PF(6)(-), F(-), Cl(-), NO(3)(-) and SO(4)(2-) were 1-200 mg/L 0=0.9997), 0.1-25 mg/L O=0.9995), 0.1-5 mg/L(r=0.9997), 0.1-5 mg/L(r=0.9997) and 0.1-5 mg/LO=0. 9999), whereas detection limits calculated at S/N=3 were 8.90, 0.41, 0.44, 1.23 and 1.20 mu g/L, respectively. The recoveries were in the range of 86.5%-112.2% with the relative standard deviations of 1.4%~4.1%. The method could be applied to determine strong retentive and weak retentive ions simultaneously.