Quantitative Analysis of Pb with Laser-Induced Breakdown Spectroscopy in Human's Nail

The experiment uses pulse laser as light source to induce human nails producing laser plasma under the atmospheric environment. Then analyze lead elements in human nails through quantitative analysis method. The experiment develops a group of LIBS optimum conditions to survey the human nails, including single laser pulse energy, the delay time of pulse laser transmission and plasma gathering by spectroscope, the distance of lens and nails, etc. The experiment shows that many illnesses are related to heavy metal elements, which can be tested in the body tissues such as nails. This paper adopts external standard method analyses the content of Pb in the 405.7807nm. Experiment results show that there is a good linear relationship between the content of Pb and spectrum intensity. It also indicates that the LIBS technology is a fast and effective medical detection method.