CAJ | 학술논문

天然石材主要有大理石、花岗岩等；人造石材多以不饱和聚酯树脂为基料，添加适量的无机物粉料和添加剂固化制成。由于石材种类繁多，并且各种石材的岩体所含矿物成分也有差异，当前很少应用化学成分分析方法能实现准确、快速鉴别天然和人造石材，仅有的红外光谱法由于对待测物纯度的要求较高而具局限性。本文基于微波等离子体炬源（MPT）同时具有热解吸与强电离能力，能在短时间内离子化待测物的特点，采用微波等离子体炬质谱（MPT－MS ）技术，无需样品复杂预处理直接对天然石材与人造石材进行分析，获得正离子检测模式下在m／z 50～1000之间的石材的指纹谱图，并运用化学计量学的主成分分析（PCA）方法处理所获取的数据，实现了不同品质建筑石材的区分。结果表明，MPT－MS能够获得石材丰富的指纹谱图，结合PCA方法能够快速鉴别天然石材与人造石材，天然石材中解吸出的物质主要为CO2和H2 O的团簇分子；而人造石材中解吸出的主要成分为有机物（人为添加的黏合剂等）。本研究采用的MPT－MS 技术无需采用喷雾、激光、基质和加热等方法辅助，并且无需对石材进行任何复杂的处理即可进行质谱分析，从而获取石材表面及内部物质的质谱信息，为快速直接鉴定石材样品提供了一种新的质谱分析方法。
천연석재주요유대리석、화강암등；인조석재다이불포화취지수지위기료，첨가괄량적무궤물분료화첨가제고화제성。유우석재충류번다，병차각충석재적암체소함광물성분야유차이，당전흔소응용화학성분분석방법능실현준학、쾌속감별천연화인조석재，부유적홍외광보법유우대대측물순도적요구교고이구국한성。본문기우미파등리자체거원（MPT）동시구유열해흡여강전리능력，능재단시간내리자화대측물적특점，채용미파등리자체거질보（MPT－MS ）기술，무수양품복잡예처리직접대천연석재여인조석재진행분석，획득정리자검측모식하재m／z 50～1000지간적석재적지문보도，병운용화학계량학적주성분분석（PCA）방법처리소획취적수거，실현료불동품질건축석재적구분。결과표명，MPT－MS능구획득석재봉부적지문보도，결합PCA방법능구쾌속감별천연석재여인조석재，천연석재중해흡출적물질주요위CO2화H2 O적단족분자；이인조석재중해흡출적주요성분위유궤물（인위첨가적점합제등）。본연구채용적MPT－MS 기술무수채용분무、격광、기질화가열등방법보조，병차무수대석재진행임하복잡적처리즉가진행질보분석，종이획취석재표면급내부물질적질보신식，위쾌속직접감정석재양품제공료일충신적질보분석방법。
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 be accurately and quickly determined by chemical composition. Consequently, the development of Infrared Reflection Spectroscopy (IRS)has been established 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 -1 000.All data from natural stones and artificial stones were analyzed by Principal Component Analysis (PCA)for differentiation of natural and artificial 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 with artificial stones.CO2 and H2 O molecular clusters were desorbed from natural stones,however,organics (i.e.adhesives)were desorbed from artificial stones.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 directly analyzed by MPT-MS .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 for untreated solid materials,such as construction stones,at the molecular level.