Application of Laser Induced Plasma Spectroscopy to detect contaminants in food Mangasi Alion Marpaung1), Erfan Handoko1), Marincan Pardede2)
1) Program studi fisika, FMIPA, Universitas Negeri Jakarta, jl. Rawamangun muka, Rawamangun, Jakarta Timur 13220
Abstract
We have conducted experiment using Nd-YAG laser at fundamental mode to generate plasma from meatballs sample that was contained borax as a contaminant with various concentration. The plasma emission has been investigated by using A gated Optical Multichannel Analyzer (OMA). The boron emission line (B I 249.7 nm) has been used as indicator of existence of borax in meatballs food. The optimum conditions of plasma generation in this experiment were at 83 mJ laser energy, 20 Torr helium surrounding gas pressure, 1s OMA delay. At these optimum conditions, the existence of 0.5 % (w) borax could be detected by means of boron emission line. These experimental results shows that laser induced plasma spectroscopy is applicable as a tool for emission spectrochemical analysis of material sample even soft or hard sample.
