Quick Search:       Advanced Search
ZHOU Wei,XIONG Hai-long,YANG Mei-ling,CHEN Huan-wen,QU Ying,ZHANG Xing-lei,FANG Xiao-wei.Microwave Plasma Torch Mass Spectrometry for Rapid Differentiation of Natural and Artificial Construction Stones[J].Rock and Mineral Analysis,2014,33(6):782-788
View Full Text   View/Add Comment   EndNote   BibTeX   Download reader
Microwave Plasma Torch Mass Spectrometry for Rapid Differentiation of Natural and Artificial Construction Stones
Received:April 28, 2014  Revised:October 04, 2014
DOI:
Key words: natural stones  artificial stones  microwave plasma torch  mass spectrometry  principal component analysis
Author NameAffiliationE-mail
ZHOU Wei Jiangxi Key Laboratory for Mass Spectrometry and Instrumentation, East China Institute of Technology, Nanchang 330013, China  
XIONG Hai-long Jiangxi Key Laboratory for Mass Spectrometry and Instrumentation, East China Institute of Technology, Nanchang 330013, China  
YANG Mei-ling Jiangxi Key Laboratory for Mass Spectrometry and Instrumentation, East China Institute of Technology, Nanchang 330013, China  
CHEN Huan-wen Jiangxi Key Laboratory for Mass Spectrometry and Instrumentation, East China Institute of Technology, Nanchang 330013, China chw8868@gmail.com 
QU Ying Jiangxi Key Laboratory for Mass Spectrometry and Instrumentation, East China Institute of Technology, Nanchang 330013, China  
ZHANG Xing-lei The Research Center of Analysis and Testing of East China Institute of Technology, East China Institute of Technology, Nanchang 330013, China  
FANG Xiao-wei The Research Center of Analysis and Testing of East China Institute of Technology, East China Institute of Technology, Nanchang 330013, China  
Hits: 1573
Download times: 1194
Abstract:
      The distinction between natural stones such as marble and granite, and artificial stones formed mostly by unsaturated polyester resin with the addition of disintegrating slag of natural stone and some additives is difficult to determine accurately and quickly by chemical composition. Consequently, the development of Infrared Reflection Spectroscopy (IRS) has been established for for this purpose, but has limitations due to the high purity requirement of samples. Based on the high ability of thermal desorption and ionization of Microwave Plasma Torch (MPT), analyte could be ionized in a short time. In this study, Microwave Plasma Torch Mass Spectrometry (MPT-MS) was used to directly analyze natural and artificial stone without sample pretreatment. The fingerprint mass spectra of these stones were obtained in the mass range of m/z 50-1000. All data from artificial stones and natural stones were analyzed by principal component analysis (PCA) for differentiation of artificial and natural stones. The results show that abundant fingerprints of stones were acquired by MPT-MS. With the application of PCA, natural stones were successfully and rapidly differentiated from artificial stones. CO2 and H2O molecular clusters were desorbed from natural stones, however, organics (i.e. adhesives) were desorbed from artificial stone. Herein, MPT-MS is a new mass spectrometry technology under atmospheric pressure. Without the assistance of spray, laser, matrix and heat, the stones can be analyzed by MPT-MS directly. The method has high analytical speed (1 min per sample), high sensitivity, and does not require sample pretreatment. The results indicate that direct MPT-MS analysis allows rapid differentiation of untreated solid materials, such as construction stones, at the molecular level.