College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China.
Analyst. 2012 Feb 7;137(3):686-90. doi: 10.1039/c1an15955k. Epub 2011 Dec 8.
A new, miniaturized and low power consumption photochemical vapor generation (PVG) technique utilizing an ultraviolet light-emitting diode (UV-LED) lamp is described, and further validated via the determination of trace mercury. In the presence of formic acid, the mercury cold vapor is favourably generated from Hg(2+) solutions by UV-LED irradiation, and then rapidly transported to an atomic fluorescence spectrometer for detection. Optimum conditions for PVG and interferences from concomitant elements were investigated in detail. Under optimum conditions, a limit of detection (LOD) of 0.01 μg L(-1) was obtained, and the precision was better than 3.2% (n = 11, RSD) at 1 μg L(-1) Hg(2+). No obvious interferences from any common ions were evident. The methodology was successfully applied to the determination of mercury in National Research Council Canada DORM-3 fish muscle tissue and several water samples.
一种新的、小型化和低功耗的光化学蒸气发生（PVG）技术，利用紫外发光二极管（UV-LED）灯，被描述出来，并通过痕量汞的测定进一步得到验证。在甲酸存在下，汞冷蒸气通过 UV-LED 照射从 Hg（2+）溶液中有利地生成，然后迅速被输送到原子荧光光谱仪进行检测。详细研究了 PVG 的最佳条件和共存元素的干扰。在最佳条件下，得到了 0.01μg/L 的检出限（LOD），在 1μg/L Hg（2+）时，精度优于 3.2%（n=11，RSD）。没有明显的来自任何常见离子的干扰。该方法成功地应用于加拿大国家研究委员会 DORM-3 鱼肌肉组织和几种水样中汞的测定。
