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.

使用激光诱导击穿光谱法对有益于健康的干果（开心果，杏仁，黑胡桃，白胡桃和腰果）中必需和微量重元素进行了定量研究。为了使用LIBS技术进行精确的元素曝光，建立了激光诱导等离子体的局部热力学平衡，并根据等离子体中的电子数密度使用McWhirter准则进行了验证。在更早投入使用之前，我们的LIBS检测器已经过优化。为了定量分析元素，使用了标准校准曲线（CC）-LIBS方法。使用我们的LIBS系统，在干果中检测到了诸如铝，镁，钙，铁，钾，锌和钠等营养元素以及铅，铬和铜等毒素。