论文部分内容阅读
发展了一种硅胶负载纳米二氧化钛在线预富集矿石样品中的微量硒和碲并用氢化物发生-原子荧光光谱分析法检测的简单、灵敏且抗干扰能力强的分析方法。硒和碲被选择性吸附在微柱上,并可使用2%(m/v)NaOH洗脱。详细地研究了硒和碲的氢化物发生、吸附、解吸附条件和抗干扰情况。在优化的实验条件下,进样180s,硒和碲的检出限分别达到4.0和3.6ng·L-1。灵敏度较传统的氢化物发生法分别提高了20和13倍。测定1μg·L-1硒和碲的标准偏差(n=5)分别为0.7%和2.3%。该方法可用于测定矿石样品中的痕量硒和碲。
A simple, sensitive and anti-interference analysis method was developed for the preconcentration of trace amounts of selenium and tellurium in silico-loaded nano-titanium dioxide with hydride generation by atomic fluorescence spectrometry. Selenium and tellurium are selectively adsorbed on the micropillar and can be eluted with 2% (m / v) NaOH. The hydride generation, adsorption, desorption conditions and anti-interference of selenium and tellurium were studied in detail. Under optimized experimental conditions, the detection limits of selenium and tellurium reached 4.0 and 3.6 ng · L-1, respectively. The sensitivity is 20 and 13 times higher than the traditional hydride generation method respectively. The standard deviation of 1 μg · L-1 selenium and tellurium (n = 5) was 0.7% and 2.3%, respectively. This method can be used for the determination of trace selenium and tellurium in ore samples.