Rehan I, Gondal M A, Almessiere M A, Dakheel R A, Rehan K, Sultana S, Dastageer M A
Department of Physics, Islamia College University, Peshawar 25120, Pakistan.
Laser Research Group, Physics Department, King Fahd University of Petroleum and Minerals, P.O. Box 5047, Dhahran 31261, Saudi Arabia.
Saudi J Biol Sci. 2021 Jan;28(1):408-416. doi: 10.1016/j.sjbs.2020.10.024. Epub 2020 Oct 27.
Quantitative investigation of essential and trace heavy elements present in health-beneficial dry fruits (Pistachio, Almonds, Black walnut, White walnut, and Cashew) was investigated using Laser Induced Breakdown Spectroscopy. For an accurate elemental exposure using LIBS technique, the local thermo-dynamical equilibrium of the laser induced plasma was established and verified using McWhirter criterion based on the electron number density in the plasma. Earlier to engage, our LIBS detector was optimized. For quantification of elements, standard calibration curves (CC)-LIBS method was applied. Using our LIBS system, the nutritional elements such as Al, Mg, Ca, Fe, K, Zn, and Na and toxins like Pb, Cr, and Cu were detected in dry fruits. The elemental quantification of dry fruit contents were validated using standard (ICP-AES) method and the relative accuracy of our experimental setup in comparison to ICP approach was in the ranging from 0.1 to 0.3 at 2.5-% error confidence.
利用激光诱导击穿光谱法对有益健康的干果（开心果、杏仁、黑胡桃、白胡桃和腰果）中存在的必需和痕量重金属元素进行了定量研究。为了使用激光诱导击穿光谱技术进行准确的元素暴露分析，基于等离子体中的电子数密度，利用麦克惠特准则建立并验证了激光诱导等离子体的局部热力学平衡。在开始实验之前，对我们的激光诱导击穿光谱探测器进行了优化。对于元素定量，应用了标准校准曲线（CC）-激光诱导击穿光谱法。使用我们的激光诱导击穿光谱系统，在干果中检测到了铝、镁、钙、铁、钾、锌和钠等营养元素以及铅、铬和铜等毒素。使用标准（电感耦合等离子体原子发射光谱法）方法对干果成分的元素定量进行了验证，并且在2.5%误差置信度下，我们的实验装置与电感耦合等离子体方法相比的相对准确度在0.1至0.3范围内。
