电感耦合等离子体原子发射光谱法测定电炉熔炼黄磷电尘灰中镓

镓是广泛应用于电子工业和核能工业的重要稀散金属,对电炉熔炼黄磷电尘灰中镓含量的准确测定是从电炉熔炼黄磷电尘灰中提取镓的重要环节,以罗丹明B萃取-分光光度法测定黄磷电尘灰中的镓含量,结果准确,但操作繁琐、周期较长,难于快速测定电炉熔炼黄磷电尘灰中镓含量。试验采用王水-氢氟酸-硫酸体系溶解样品,选择Ga 417.20nm为分析谱线,建立了电感耦合等离子体原子发射光谱法(ICP-AES)测定电炉熔炼黄磷电尘灰中微量镓的分析方法。校准曲线线性相关系数为0.9999;方法中镓的检出限为0.0021μg/mL,测定下限为0.010μg/mL。按照实验方法测定电炉熔炼黄磷电尘灰中镓含量,结果的相对标准偏差(RSD,n=11)为0.11%,加标回收率为99%~107%;按照实验方法测定电炉熔炼黄磷电尘灰样品中镓,并与罗丹明B萃取-分光光度法测定结果进行比对,结果相一致。

Determination of gallium in yellow phosphorus electric dust from electric furnace smelting by inductively coupled plasma atomic emission spectrometry

Gallium is an important dissipated metal and it has been widely used in electronic industry and nuclear energy industry. The accurate determination of gallium content in yellow phosphorus electric dust from electric furnace smelting is an important step for then extraction of gallium fromyellow phosphorus electric dust from electric furnace smelting. The content of gallium yellow phosphorus electric dust is usually determined by spectrophotometry after rhodamine B extraction. The determination results are accurate. However, the operation of this method is complicated with long analysis period, which is not applicable for the rapid determination of gallium content in yellow phosphorus electric dust from electric furnace smelting. The sample was dissolved in aqua regia-hydrofluoric acid-sulfuric acid system. Ga 417.20nm was selected as the analytical spectral line. The analysis method of micro amount gallium in yellow phosphorus electric dust from electric furnace smelting by inductively coupled plasma atomic emission spectrometry (ICP-AES) was established. The linear correlation coefficient of calibration curve was 0.9999. The detection limit of gallium in the method was 0.0021μg/mL. The low limit of determination was 0.010μg/mL. The proposed method was applied for the determination of gallium in yellow phosphorus electric dust from electric furnace smelting. The relative standard deviation (RSD, n=11) was 0.11% and the recoveries were between 99% and 107%. The content of gallium in yellow phosphorus electric dust from electric furnace smelting samples was determined according to the experimental method. The found results were consistent with those obtained by rhodamine B extraction-spectrophotometry.