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Determination of Hexafluorophosphate in Waste Water Using Ion Chromatography
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摘要: 建立了离子色谱-抑制电导测定废水中六氟磷酸根的分析方法. 采用IonPac AG23+IonPac AS23阴离子交换柱分离，流速1 mL/min，KOH等度淋洗，抑制型电导检测. 采集的样品经过0.22 μm滤膜、C18柱、On-Guard Na柱处理后进样分析. 以信噪比S/N=3计算检出限，六氟磷酸根的检出限为0.02 mg/L. 方法线性相关系数r为0.999 7，试验结果峰面积的相对标准偏差为1.85%，实际样品的加标回收率在94.0%~103.3%之间. 方法简便、结果准确，可以用于实际样品检测.Abstract: An analytical method was developed for the determination of hexafluorophosphate in waste water using ion exclusion chromatography with suppressed conductivity. The separation was performed on an IonPac AG23+IonPac AS23 separate ion exchange column with a flow rate of 1 mL/min, KOH isocratic drenching and inhibited conductivity detection. The collected samples were processed on a 0.22 μm filter membrane, a C18 column, an On-Guard Na column, and then injected into the sample for analysis. The detection limit (S/N=3) of hexafluorophosphate was 0.02 mg/L. The linear coefficient was 0.999 7. The relative standard deviation of the peak area was 1.85%, and the spiked recoveries of waste water ranged from 94.0% to 103.3%. The method is simple and accurate, and can be used for the detection of actual samples.
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Key words:
- ion chromatography /
- suppressor conductivity /
- waste water /
- hexafluorophosphate
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表 1 1号样品的回收率测定结果（n=6）
Table 1. Recoveries of sample 1 (n=6)
样品原质量
分数/（mg/L）加入标样质量
分数/（mg/L）加标后测定质量
分数/（mg/L）回收
率/%n.d. 0.06 0.062 103.3 0.10 0.094 94.0 0.15 0.147 98.0 0.20 0.202 101.0 
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