Quantitative Analysis of Metal Elements in Navel Orange by Laser Induced Breakdown Spectroscopy

Rapid detection of metal elements in fruits is an important factor in evaluating the effect of pollution on agriculture.Quantitative analysis of metals Cu,Ni,Ti,Sr,Ba,Cr in drying orange peel and orange flesh by laser-induced breakdown spectroscopy(LIBS) was applied.The orange peel and orange flesh were ablated by a 1064 nm Nd:YAG pulsed laser at the same conditions.The spectra were identified by a multichannel fiber spectrometer.The relative intensities of Cu,Ni,Ti,Sr,Ba,Cr were compared and analyzed by statistical methods.The results showed a higher relative content of Ti and a little higher relative content of Ba in orange flesh than in orange peel.And the relative content of the four metals Sr,Cu,Ni and Cr,were higher in orange peel.The experimental results also showed that LIBS technique is a rapid and effective means for detecting the contents of metals in fruits.