| 离子色谱-安培法检测地下水中的溴离子及碘离子 |
| Determination of Bromide and Iodide Ions in Underground Water by Amperometric Detection on Ion Chromatography |
| 投稿时间：2023-03-01 修订日期：2024-05-10 |
| DOI：10.19316/j.issn.1002-6002.2024.05.20 |
| 中文关键词: 离子色谱 地下水 溴离子 碘离子 电化学检测器 |
| 英文关键词:ion chromatography underground water bromide ion iodide ion electrochemical detector |
| 基金项目:中国地质调查局地质调查项目(DD20230546);中国地质科学院基本科研业务费项目(CSJ-2022-09) |
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| 通讯作者:朱云* 国家地质实验测试中心, 北京 100037 |
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| 中文摘要: |
| 建立了在ICS5000+型离子色谱仪上同时测定地下水中溴离子与碘离子的方法,选择参数:AS19色谱柱,45 mmol/L NaOH淋洗液,进样量25 μL,流速1.5 mL/min,电化学检测器,工作电极配置银电极,参比电极为氯化银电极,积分-安培检测法模式,波形选择器中施加的循环电位波形选择“Silver,Ag-AgCl RE,S2-,CN,I-,S2O32-,Alkaline”。在此条件下测定有证标准物质GSB 07-1380-2001 205406(水质溴化物)相对误差3.9%,GBW09113h(水中碘)相对误差5.8%。测定溴离子定量限6.0 μg/L,碘离子定量限1.0 μg/L;溴离子加标回收率为104.0%,碘离子加标回收率为95.0%;测定溴离子精密度3.0%,碘离子精密度2.1%;可以在10 min内完成检测。探讨了电化学检测器检测效果的影响因素,这些结论在实验中较实用却少见报道。建立的方法不受水样中其他主要阴离子(如氯离子)的干扰,方法选择性高;检出限可以达到μg/L级别,且分析时间短。该方法能满足地下水及其他环境水样品中溴和碘离子测定要求,弥补了现有标准方法的不足。 |
| 英文摘要: |
| A method for simultaneous determination of Br- and I- was established by ion chromatography-ICS5000+.The separation of anions was achieved on an IonPac AS19 Column.45 mmol/L NaOH was used as eluent.Injection volume was 25 μL and flow rate was 1.5 mL/min.And Ag-AgCl was electrode on electrochemical detector."Silver,Ag-AgCl RE,S2-,CN,I-,S2O32-,Alkaline" waveform was applied on integrated amperometric detector.Determination of national standard substance GSB 07-1380-2001 205406 and GBW09113h showed that the relative error was Br- 3.9%,I- 5.8%.This method's detection limit was Br- 6.0μg/L,I- 1.0μg/L;Standard recovery rate was Br- 104.0 %,I- 95.0 %;Relative standard deviation was Br- 3.0%,I- 2.1%.This method could be completed in 10 min.Some influence factors on amperometric detection were also discussed,which is helpful in experiment but rarely reported.This method is more selective,and will not interfered by other main anions such as chloridion.Detection limit is as low as micrograms per liter,and analysis time is short.This method is suitable for the requirements of determination of bromide and iodide ions in underground water and other environmental water.It makes up for the shortcomings of the existing standard methods. |
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