本文建立了脉冲安培检测器同时测定模拟海水中溴和碘离子的离子色谱方法,选用IonPac AS 20型分析柱,通过对淋洗液种类和浓度进行详细的试验,最终确定采用60 mmol/L的NaOH溶液作淋洗液,流速为1.0mL/min的条件下进行测定,使Cl-、Br-和I-...本文建立了脉冲安培检测器同时测定模拟海水中溴和碘离子的离子色谱方法,选用IonPac AS 20型分析柱,通过对淋洗液种类和浓度进行详细的试验,最终确定采用60 mmol/L的NaOH溶液作淋洗液,流速为1.0mL/min的条件下进行测定,使Cl-、Br-和I-基线分离。高含量的氯对测定溴和碘不存在干扰,方法的线性相关性好(r2>0.999),检出限为0.2μg/L。样品测试的相对标准偏差RSD小于4%,加标回收率95.0%～100.0%。展开更多
A method for determination of iodide in complex matrix-acetic acid,glacial acetic acid and acetic anhydride was established using high performance anion exchange chromatography with pulsed amperometric detector(HPAEC-...A method for determination of iodide in complex matrix-acetic acid,glacial acetic acid and acetic anhydride was established using high performance anion exchange chromatography with pulsed amperometric detector(HPAEC-PAD).Using 200 mmol/Lnitric scid solution as mobile phase,iodide can be separated within 10 min on high hydrophilic IonPac AS16 column.The relative standard deviation(RSD)of 20μg/L iodide standard solution prepared in industrial acetic acid,glacial acetic acid and acetic anhydride was 1.8%,11.5% and 8.0%,separately.The detection limit was 0.02,0.04μg/L,separately(500μg injection,3 times of signal to moise ratio).The proposed method was applied for determination of iodide in real samples,noiodide was detected and the recovery was ranging from 85 to 111%?This method has asvantages of simplicity to prepare the samples,no inteference and high sensitivity,etc.展开更多
文摘本文建立了脉冲安培检测器同时测定模拟海水中溴和碘离子的离子色谱方法,选用IonPac AS 20型分析柱,通过对淋洗液种类和浓度进行详细的试验,最终确定采用60 mmol/L的NaOH溶液作淋洗液,流速为1.0mL/min的条件下进行测定,使Cl-、Br-和I-基线分离。高含量的氯对测定溴和碘不存在干扰,方法的线性相关性好(r2>0.999),检出限为0.2μg/L。样品测试的相对标准偏差RSD小于4%,加标回收率95.0%～100.0%。
文摘A method for determination of iodide in complex matrix-acetic acid,glacial acetic acid and acetic anhydride was established using high performance anion exchange chromatography with pulsed amperometric detector(HPAEC-PAD).Using 200 mmol/Lnitric scid solution as mobile phase,iodide can be separated within 10 min on high hydrophilic IonPac AS16 column.The relative standard deviation(RSD)of 20μg/L iodide standard solution prepared in industrial acetic acid,glacial acetic acid and acetic anhydride was 1.8%,11.5% and 8.0%,separately.The detection limit was 0.02,0.04μg/L,separately(500μg injection,3 times of signal to moise ratio).The proposed method was applied for determination of iodide in real samples,noiodide was detected and the recovery was ranging from 85 to 111%?This method has asvantages of simplicity to prepare the samples,no inteference and high sensitivity,etc.
