The Use of Laser Induced Breakdown Spectroscopy (LIBS) to Study Catalyst Deactivation of V2 O5 /γ-Al2 O3 as Compared to Inductively Coupled Plasma Optical Emission Spectrometry

2019 ◽  
Vol 645 (16) ◽  
pp. 1057-1061 ◽  
Author(s):  
Mohammad Hossein Keshavarz ◽  
Sahar Belyani ◽  
Seyyed Mohammad Reza Darbani ◽  
Masoud Kavosh Tehrani
Keyword(s):  
Inductively Coupled Plasma ◽  
Catalyst Deactivation ◽  
Optical Emission ◽  
Optical Emission Spectrometry ◽  
Emission Spectrometry ◽  
Laser Induced Breakdown Spectroscopy ◽  
Inductively Coupled ◽  
Breakdown Spectroscopy ◽  
Laser Induced Breakdown ◽  
Plasma Optical Emission Spectrometry

Elemental Analysis of Asphaltenes Using Simultaneous Laser-Induced Breakdown Spectroscopy (LIBS)–Laser Ablation Inductively Coupled Plasma Optical Emission Spectrometry (LA-ICP-OES)

2019 ◽  
Vol 73 (5) ◽  
pp. 540-549 ◽  
Author(s):  
Dayana Oropeza ◽  
Jhanis González ◽  
José Chirinos ◽  
Vassilia Zorba ◽  
Estrella Rogel ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Inductively Coupled Plasma ◽  
Optical Emission ◽  
Emission Spectrometry ◽  
Laser Induced Breakdown Spectroscopy ◽  
Icp Oes ◽  
Inductively Coupled ◽  
Breakdown Spectroscopy ◽  
Laser Induced Breakdown ◽  
Plasma Optical Emission Spectrometry

Laser-induced breakdown spectroscopy (LIBS) and laser ablation inductively coupled plasma optical emission spectrometry (LA-ICP-OES) were used simultaneously for the elemental analysis of asphaltene samples using minimum sample pretreatment in combination with low laser energy to reduce the amount of removed particles and avoid carbon deposits in the ablation cell. Quantitative analyses of S, Ni, and V were accomplished with LA-ICP-OES using external calibration with the C line as internal standard. The aromatic/paraffinic nature of the asphaltenes was also obtained throughout the H/C ratio using LIBS and partial least square regression model. The results showed very good agreement (±10%) between the concentration obtained by LA-ICP-OES and microwave-assisted acid digestion values.

Characterization of Pottery from Teotihuacan Using Laser-Induced Breakdown Spectroscopy and Inductively Coupled Plasma Optical Emission Spectroscopy

2021 ◽  
pp. 000370282199193
Author(s):  
Hugo Sobral ◽  
Mitzi Amador-Mejía ◽  
Ciro Márquez-Herrera
Keyword(s):  
Elemental Composition ◽  
Inductively Coupled Plasma ◽  
Principal Component ◽  
Optical Emission ◽  
Emission Spectrometry ◽  
Laser Induced Breakdown Spectroscopy ◽  
Icp Oes ◽  
Inductively Coupled ◽  
Breakdown Spectroscopy ◽  
Laser Induced Breakdown

Pottery sherds from Teotihuacan, Mexico, belonging to the Formative and Classic periods (150 BCE–700 CE) were investigated using laser-induced breakdown spectroscopy (LIBS) and inductively coupled plasma optical emission spectrometry (ICP-OES). LIBS results show that most of the investigated samples have primarily the same elemental composition. Nevertheless, there are also a few sherds that could be associated to foreign ceramic groups with characteristic concentrations of Na, K, Ca, Mn, Rb, and Sr. The relative elemental composition of red pigments applied on ceramic bodies was also analyzed through a LIBS depth profiling. Diverse hematite-based pigments were distinguished according to the detected iron content. Hematite was also combined with red soils with a high relative content of Mn, Sr, Ba, or Ti. The ICP-OES analysis of ceramic pastes is consistent with the emission intensities obtained using LIBS. Principal component analysis indicates that all samples identified as locals belong to a single chemical group. Moreover, locally made ceramics and the analyzed clays from the nearby area have the same elemental composition, which appears clearly differentiated from imported samples.

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