微波消解-分光光度法测定钒钛磁铁矿中的钒

基金项目:

国家质检总局2008年科技计划项目(2008IK049)横向委托项目(HW0019)

Determination of Vanadium in Vanadium-Titanium Magnetite Ores by Spectrophotometry with Microwave Digestion

1.
Guangzhou Entry-Exit Inspection and Quarantine Bureau, Guangzhou 510623, China
2.
Institute of Material & Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, China
3.
Institute of Material & Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, China
4.
Institute of Material & Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, China
5.
Institute of Material & Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, China
6.
Institute of Material & Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, China
7.
Institute of Material & Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, China

摘要: 采用硫-磷混合酸微波消解对难溶的钒钛磁铁矿进行前处理,用5-溴-PADAP-过氧化氢分光光度法测定矿样中的钒,优化了微波消解的实验条件。加入浓磷酸和40 g/L氟化钠分别消除了共存常量元素铁和钛的干扰。方法检出限为0.004 μg/mL,线性范围为0.01~1.0 μg/mL 。应用于实际钒钛磁铁矿样品中钒的测定,重现性好,检出限较低,灵敏度较高,能够满足简单、快速、批量分析的要求。
- 微波消解 /
- 分光光度法 /
- 钒钛磁铁矿 /
- 钒
Abstract: Vanadium in vanadium-titanium magnetite samples was determined by micro digestion-spectrophotometry with 5-bromo PADAP hydrogen peroxide system. The experimental conditions for microwave digestion were optimized. The interference from coexistent major elements of iron and titanium was studied and eliminated by using concentrated H₃PO₄ and 40 g/L NaF. The detection limit of the method for vanadium was 0.004 μg/mL with linear range of 0.01~1.0 μg/mL. The method had been applied to the determination of vanadium in vanadium-titanium magnetite samples with satisfactory results. The method provides the advantages of low detection limit, good reproducibility, high sensitivity, high efficiency, simple operation and suitable for the routine sample analysis.
- microwave /
- digestion /
- spectrophotometry /
- vanadium-titanium