离子色谱法测定碳酸锂中氯离子和硫酸根离子的含量
发布时间：2018-07-24 14:09
【摘要】：取碳酸锂样品0.500g,加适量水溶解,用水定容至100mL。分取试液10.00mL在不去除碳酸根基体的前提下直接进行离子色谱分析。采用阴离子交换柱Dionex IonPac AS11作为分离柱,用氢氧化钾淋洗液发生器产生的15mmol·L~(-1) KOH溶液为流动相,流量为1.0mL·min~(-1),柱温为30℃进行色谱分离和测定。氯离子和硫酸根离子的线性范围分别在16.0mg·L~(-1)和3.2mg·L~(-1)以内,检出限(3s/k)分别为0.004,0.01mg·L~(-1)。对同一个样品进行精密度试验,测定值的相对标准偏差(n=6)小于2.7%。按标准加入法进行回收试验,回收率在93.8%~106%之间。分析结果表明,样品测定结果与电化学法和在线去除基体离子色谱法的测定结果相符。
[Abstract]:The lithium carbonate sample 0.500g was dissolved with water, and the liquid was fixed to 100mL. to separate the liquid 10.00mL on the basis of no carbon acid base. The anion exchange column Dionex IonPac AS11 was used as the separation column and the produced 15mmol. L~ (-1) KOH solution produced by the potassium hydroxide leaching solution was the mobile phase. The chromatographic separation and determination of 1.0mL. Min~ (-1) and column temperature at 30 C. The linear range of chloride and sulfate radical ions is within 16.0mg. L~ (-1) and 3.2mg. L~ (-1) respectively. The detection limit (3s/k) is 0.004,0.01mg L~ (3s/k). The precision test of the same sample is carried out. The relative standard deviation of the measured value is less than the standard addition method The recovery test was carried out and the recovery rate was between 93.8%~106%. The results of the analysis showed that the results of the samples were in agreement with the results of the electrochemical method and the on-line removal of the matrix ion chromatography.
【作者单位】： 中国科学院上海硅酸盐研究所;
【基金】：上海市无机非金属材料分析测试表征专业技术服务平台资助(14DZ2292900)
【分类号】：TQ131.11;O657.7
本文编号：2141619
[Abstract]:The lithium carbonate sample 0.500g was dissolved with water, and the liquid was fixed to 100mL. to separate the liquid 10.00mL on the basis of no carbon acid base. The anion exchange column Dionex IonPac AS11 was used as the separation column and the produced 15mmol. L~ (-1) KOH solution produced by the potassium hydroxide leaching solution was the mobile phase. The chromatographic separation and determination of 1.0mL. Min~ (-1) and column temperature at 30 C. The linear range of chloride and sulfate radical ions is within 16.0mg. L~ (-1) and 3.2mg. L~ (-1) respectively. The detection limit (3s/k) is 0.004,0.01mg L~ (3s/k). The precision test of the same sample is carried out. The relative standard deviation of the measured value is less than the standard addition method The recovery test was carried out and the recovery rate was between 93.8%~106%. The results of the analysis showed that the results of the samples were in agreement with the results of the electrochemical method and the on-line removal of the matrix ion chromatography.
【作者单位】： 中国科学院上海硅酸盐研究所;
【基金】：上海市无机非金属材料分析测试表征专业技术服务平台资助(14DZ2292900)
【分类号】：TQ131.11;O657.7
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