Alamelu D, Sarkar A, Aggarwal S K
Fuel Chemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India.
Talanta. 2008 Oct 19;77(1):256-61. doi: 10.1016/j.talanta.2008.06.021. Epub 2008 Jun 25.
This paper reports studies on the determination of trace levels of samarium, europium and gadolinium in aqueous samples by laser-induced breakdown spectroscopy (LIBS). In this work, a membrane-based filter paper was used as a sample support for the liquid samples. The laser-induced plasma was produced in air at atmospheric pressure, using a pulsed Nd:YAG laser. Calibration standards and synthetic mixtures of these lanthanides were prepared using solutions prepared from respective high purity oxides. Linear calibration was obtained for Sm, Eu and Gd by normalizing the intensities of lanthanides emission lines with respective to C(I) 193.029 nm emission line. The concentrations of Sm, Eu and Gd were then determined in a solution containing a mixture of these lanthanides. The concentrations of individual lanthanides were obtained within 5% of the expected values. Limits of detection were found to be 1.3 ppmw (Sm), 1.9 ppmw (Eu) and 2.3 ppmw (Gd).
本文报道了利用激光诱导击穿光谱法（LIBS）测定水样中痕量钐、铕和钆的研究。在本工作中，基于膜的滤纸被用作液体样品的样品支撑体。使用脉冲Nd:YAG激光在大气压下的空气中产生激光诱导等离子体。这些镧系元素的校准标准品和合成混合物是用由各自的高纯氧化物制备的溶液配制而成。通过将镧系元素发射线的强度相对于C(I) 193.029 nm发射线进行归一化，获得了钐、铕和钆的线性校准曲线。然后测定了含有这些镧系元素混合物的溶液中钐、铕和钆的浓度。各镧系元素的浓度测定值在预期值的5%以内。检测限分别为1.3 ppmw（钐）、1.9 ppmw（铕）和2.3 ppmw（钆）。
