Characterization of Laser-Induced Plasma of Water Extracted From Orange Juice

Abstract

Optical emission of laser-induced plasma on the surface of water extracted from fresh orange juices provides sensitive analysis of trace elements. This emergent technique promises applications with expected outcomes in food security or nutrition quality. Characterization of the plasma induced on such samples can represent a method to characterize the quality of soils where the oranges were planted. In this paper, we present the experimental setup and protocol that optimizes the plasma generation on liquid surfaces. We focus particularly on the detection of Ca, Mg, and Na. By way of stallion solutions (CaCl2, MgCl2 and NaCl), we try to determine the concentrations of these elements. We set as samples, oranges coming from Tunisia and Spain.