离子色谱法同时测定硝酸锶中 硫酸盐及亚硫酸盐的含量

当硫酸盐和亚硫酸盐共存时，对硝酸锶中这2种杂质的测定存在一定的难度。建立了同时测定工业硝酸锶样品中的硫酸盐及亚硫酸盐含量的离子色谱方法。采用ICS-1500型离子色谱仪，选取IonPac AS18作为色谱分离柱，以氢氧化钾进行梯度洗脱，电导检测器检测，线性相关系数达到0.999 4~0.999 6，加标回收率为87.4%~100.8%，相对标准偏差2.9%~3.2%。该方法准确、快速，在生产检测中具有重要意义。

Determination of sulfate and sulfite contents in strontium nitrate by ion chromatography method at same time

When sulfate and sulfite coexisted，the determination of these two impurities in strontium nitrate was difficult.Simultaneous determination method of sulfate and sulfite contents in strontium nitrate by ion chromatography method was established. The ICS-1500 ion chromatography and IonPac AS18 as chromatographic separation column were selected.The KOH gradient elution and conductivity detector were used by determination.The linear correlation coefficient was reported at 0.999 4~0.999 6 and the recovery ratio was at 87.4%~100.8%.The relative standard deviation was at 2.9%~3.2%.It was proved that this method was accurate，fast，and meaningful in the production tests.