离子色谱法测定硫酸氧钒中的Cl-和C2O2-4

离子色谱法测定硫酸氧钒中的Cl^-和C₂O^2-₄

摘要: 采用离子色谱法测定硫酸氧钒中的Cl-和C2O42-。以水合肼沉淀除去硫酸氧钒溶液中的钒离子,上清液经Onguard Ⅱ H柱过滤后,采用IonPac AS19阴离子分离柱和IonPac AG19阴离子保护柱,以氢氧化钾溶液为淋洗液进行梯度淋洗,电导检测器进行检测。Cl-和C2O42-的线性范围分别为0.01~0.50,0.10~50.0 mg·L-1,测定下限分别为0.597,0.594 mg·kg-1。加标回收率分别在96.9%~104%和88.2%~92.0%之间,测定值的相对标准偏差均小于5.0%。

Abstract: IC was applied to the determination of Cl- and C2O42- in vanadyl sulfate. Vanadium ion in the sample solution was removed by precipitation with hydrazine hydrate solution. The supernatant was filtered through an Onguard Ⅱ H column. IonPac AS19 anion separation column and IonPac AG19 anion guard column were used in IC analysis with potassium hydroxide solution as eluent for gradient elution. Conductivity detection was adopted. The linearity ranges of Cl- and C2O42- were 0.01-0.50 and 0.10-50.0 mg·L-1, with the lower limits determination of 0.597 and 0.594 mg·kg-1, respectively. Recovery rates of Cl- and C2O42- were in the range of 96.9%-104% and 88.2%-92.0%, respectively, and RSDs were less than 5.0%.