Detection of organic products of polymer pyrolysis by thermogravimetry-supersonic jet-skimmer time-of-flight mass spectrometry (TG-Skimmer-SPI-TOFMS) using an electron beam pumped rare gas excimer VUV-light source (EBEL) for soft photo ionisation
Detection of organic products of polymer pyrolysis by thermogravimetry-supersonic jet-skimmer time-of-flight mass spectrometry (TG-Skimmer-SPI-TOFMS) using an electron beam pumped rare gas excimer VUV-light source (EBEL) for soft photo ionisation
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DOI：
10.1007/s10973-011-1383-2
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发表时间：
2011-03
影响因子：
4.4
通讯作者：
M. Saraji-Bozorgzad;T. Streibel;E. Kaisersberger;T. Denner;R. Zimmermann
中科院分区：
文献类型：
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作者：
M. Saraji-Bozorgzad;T. Streibel;E. Kaisersberger;T. Denner;R. Zimmermann
商业热重-超音速喷气撇渣器四极质谱仪系统（TG-Skimmer-QMS，Netzsch GmbH，德国）成功改造用于有机化合物的软单光子电离飞行时间质谱（SPI-TOFMS）检测。用于SPI的VUV光由电子束泵浦的氩受激准分子光源（EBEL;Ephoton= 9.8eV）产生。此外，该系统的多功能性是保守的，因为高温TG和DSC测量以及用于检测无机化合物的电子电离质谱仍然是可能的。用两种聚合物和烃混合物（柴油）测试新系统。结果表明，脂肪族和芳香族有机化合物可以检测到没有破碎。因此，该系统允许记录易于解释的有机特征，例如热聚合物分解。聚苯乙烯的热降解显示出丰富的签名的单体，一些低聚物和次要产品的不规则裂解的碳链。聚碳酸酯显示出以双酚A产物为主的热分解指纹。然而，双酚A单体也是可检测的。
A commercial thermogravimetry—supersonic jet-skimmer quadrupole mass spectrometer system (TG-Skimmer-QMS, Netzsch GmbH, Germany) was successfully converted for soft single photon ionisation time-of-flight mass spectrometric (SPI-TOFMS) detection of organic compounds. VUV light for SPI was generated by an electron beam pumped argon excimer light source (EBEL;Ephoton= 9.8 eV). Furthermore, the versatility of the system was conserved, as high temperature TG and DSC measurements as well as electron ionisation mass spectrometry for the detection of inorganic compounds are still possible. The new system was tested with two polymers and a hydrocarbon mixture (diesel). It was demonstrated that aliphatic and aromatic organic compounds can be detected without fragmentation. Thus the system allows the recording of a readily interpretable organic signature of, e.g. thermal polymer decomposition. The thermal degradation of polystyrene shows a rich signature of the monomer, some oligomers and minor products of irregular cleavings of carbon chains. Polycarbonate exhibits a thermal decomposition fingerprint which is dominated by products of bisphenol A. The bisphenol A monomer, however, is also detectable.