Application of Graph Theory to Unsupervised Classification of Materials by Laser-Induced Breakdown Spectroscopy E. Grifoni, S. Legnaioli, G. Lorenzetti, S. Pagnotta, V. Palleschi PII: S0584-8547(16)00017-3 DOI: doi: 10.1016/j.sab.2016.02.003 Reference: SAB 5022 To appear in: Spectrochimica Acta Part B: Atomic Spectroscopy Received date: 27 August 2015 Revised date: 16 January 2016 Accepted date: 2 February 2016 Please cite this article as: E. Grifoni, S. Legnaioli, G. Lorenzetti, S. Pagnotta, V. Palleschi, Application of Graph Theory to Unsupervised Classification of Materials by Laser-Induced Breakdown Spectroscopy, Spectrochimica Acta Part B: Atomic Spectroscopy (2016), doi: 10.1016/j.sab.2016.02.003 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.