Abstract
In this study, the quantitative analysis of heavy elementals contents available in drinking water are studied using one step technique; laser induced breakdown spectroscopy (LIBS) technique. This was done by developing a new method to improve the detection limits of LIBS for manganese (as example of heavy elements) in aqueous solutions with different concentrations. In this method a medium-density fiberboard (MDF) wood have been used as a substrate that absorbs the liquid sample to transform laser liquid interaction to laser solid interaction. LIBS parameters were optimized to achieve high sensitivity measurements. Thus, it was found that using a focused 180 mJ of laser pulses of Nd:YAG laser at wavelength 1064 nm with pulse duration of 6 ns at repetition rate of 10 Hz on the prepared samples enhanced the signal to background ratio at detection delay of 1 microsecond. The atomic spectral lines for Mn were resolved. Under local thermodynamics LTE conditions. The calibration Curves for Mn are observed, with correlation coefficient (R-2) values similar to 0.98. The limit of detections LOD of Mn value of 623 ppb is compared the previous published ones. The manganese plasma temperature reaches 0.6 eV. The obtained results are important for important for nondestructive in -situ environmental monitoring and analysis of manganese in water.