【摘要】 采用8-羟基喹哪啶作为萃取剂,选择性地将铝基体中的钒元素萃取至氯仿中,避免了铝对钒的光谱干扰,使钒的检测能在灵敏线(309.3 nm)处进行.同时,8-羟基喹哪啶也作为化学改进剂,使钒的蒸发温度大幅降低,改善了分析性能.在pH 3.5,8-羟基喹哪啶浓度为1.5%(m/V),蒸发温度1 400℃时,方法的线性范围为0.05~10 mg/L,检出限为16.4μg/L,当钒元素的浓度为1.0 mg/L时,相对标准偏差(RSD)为4.7%.更多还原

【Abstract】 Vanadium in aluminum matrix is determined by low temperature electrothermal vaporization inductively coupled plasma optical emission spectrometry at its sensitive spectral line(309.3 nm) after selective extraction into chloroform with 8-hydroxyquinaldine as extractant so that spectral interference of aluminumcan be avoided.Furthermore,8-hydroxyquinaldine lowers the vaporization temperature of vanadium as chemical modifier and improves the analytical performance.When the pH value is 3.5,concentration of 8-hydroxyquinaldine is 1.5%(m/V) and the vaporization temperature is 1 400 ℃,the analyte can be determined quantitatively.The linearity of proposed method covers from 0.05 mg/L to 10 mg/L,the detect limit is 16.4 μg/L and the RSD is 4.7%(c=1.0 mg/L).更多还原