Compositional analysis of Hispanic Terra Sigillata by laser-induced breakdown spectroscopy

Díaz, Ana Jesús López; Nicolás, G.; Mateo, M.; Piñón, Victor; Tobar, M.J.; Ramil, A.

doi:10.1016/j.sab.2005.05.009

Cited by 46 publications

(26 citation statements)

References 30 publications

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“…López et al 264 applied the LIBS technique for the analysis of Hispanic Terra Sigillata (Roman) pottery dating back to the 1 st -5 th century A.C. from two important ceramic production centers in Spain. Complementary analyses were carried out with scanning electron microscopy linked with energy dispersive X-ray microanalysis (SEM/EDX).…”

Section: Use In Pottery and Ceramic Analysismentioning

confidence: 99%

Laser Induced Breakdown Spectroscopy

Pasquini¹,

Cortez²,

Silva³

et al. 2007

J. Braz. Chem. Soc.

341

195

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Esta revisão descreve os aspectos fundamentais, a instrumentação, as aplicações e tendências futuras de uma técnica analítica que se encontra em seu estágio de consolidação e que está em vias de estabelecer o seu nicho entre as técnicas espectrofotométricas modernas. A técnica é denominada Espectroscopia de Emissão em Plasma Induzido por Laser (em inglês, Laser Induced Breakdown Spectroscopy, LIBS) e sua principal característica está no uso de pulsos de laser como fonte de energia para vaporizar a amostra e excitar a emissão de radiação eletromagnética, a partir de seus elementos e/ou fragmentos moleculares. A radiação emitida é analisada por meio de instrumentos ópticos de alta resolução e as suas intensidades são medidas, usualmente com detectores rápidos de estado sólido. Em conjunto, esses dispositivos permitem a geração e a medida de um espectro de emissão de faixa ampla do fenômeno induzido pelo pulso de laser. O espectro registrado contém informação qualitativa e quantitativa que pode ser correlacionada com a identidade da amostra ou empregada na determinação da quantidade de seus constituintes. Essa revisão é dividida em quatro partes. A primeira aborda aspectos históricos da técnica e os conceitos teóricos relevantes associados com LIBS; então, os aspectos práticos de diversas abordagens experimentais e instrumentais empregadas na implementação da técnica são revistos de forma crítica; as aplicações encontradas na literatura, incluindo aquelas que empregam quimiometria, são classificadas e exemplificadas por meio de trabalhos relevantes recentemente publicados. Finalmente, uma tentativa de estabelecer uma avaliação global e as perspectivas futuras para a técnica é apresentada.This review describes the fundamentals, instrumentation, applications and future trends of an analytical technique that is in its early stages of consolidation and is establishing its definitive niches among modern spectrometric techniques. The technique has been named Laser Induced Breakdown Spectroscopy (LIBS) and its main characteristic stands in the use of short laser pulses as the energy source to vaporize samples and excite the emission of electromagnetic radiation from its elements and/or molecular fragments. The emitted radiation is analyzed by high resolution optics and the intensities are recorded, usually by fast triggered solid state detectors. Together, these devices allow producing and registering a wide ranging emission spectrum of the short-lived phenomenon induced by the laser pulse. The spectrum contains qualitative and quantitative information which can be correlated with sample identity or can be used to determine the amount of its constituents. This review is divided in four parts. First, the relevant historical and theoretical concepts associated with LIBS are presented; then the main practical aspects of the several experimental and instrumental approaches employed for implementation of the technique are critically described; the applications related in the literature, including those making use of chemometri...

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Section: Use In Pottery and Ceramic Analysismentioning

confidence: 99%

Laser Induced Breakdown Spectroscopy

Pasquini¹,

Cortez²,

Silva³

et al. 2007

J. Braz. Chem. Soc.

341

195

View full text Add to dashboard Cite

show abstract

“…Combinations of the original dimensions describe the largest variance between data sets, and most of the information from the original data set can be accounted for by a smaller number of variables. The use of multivariate statistical methods, including PCA, for the differentiation between similar laser induced breakdown spectra has been particularly useful for the separation of different samples of Roman ceramics known as "Terra Sigilata" [23,24]. A similar approach for the analysis of spectra recorded from pigment samples in the region between 390 and 399 nm has been explored.…”

Section: Introductionmentioning

confidence: 99%

Analysis of natural and artificial ultramarine blue pigments using laser induced breakdown and pulsed Raman spectroscopy, statistical analysis and light microscopy

Osticioli

Mendes

Nevin

et al. 2009

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

155

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a b s t r a c tPulsed laser induced breakdown spectroscopy (LIBS) and Raman spectroscopy were performed using a novel laboratory setup employing the same Nd:YAG laser emission at 532 nm for the analysis of five commercially available pigments collectively known as "ultramarine blue", a sodium silicate material of either mineral origin or an artificially produced glass. LIBS and Raman spectroscopy have provided information regarding the elemental and molecular composition of the samples; additionally, an analytical protocol for the differentiation between natural (lapis lazuli) and artificial ultramarine blue pigments is proposed. In particular LIBS analysis has allowed the discrimination between pigments on the basis of peaks ascribed to calcium. The presence of calcite in the natural blue pigments has been confirmed following Raman spectroscopy in specific areas of the samples, and micro-Raman and optical microscopy have further corroborated the presence of calcite inclusions in the samples of natural origin. Finally multivariate analysis of Laser induced breakdown spectra using principal component analysis (PCA) further enhanced the differentiation between natural and artificial ultramarine blue pigments.

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“…Hay que señalar que el procedimiento no es directo debido a que la señal de intensidad del plasma decrece con la profundidad [26]. Para tener en cuenta este comportamiento, las áreas de los picos se normalizaron por el área total del espectro obtenido en cada pulso láser [32,33].…”

Section: Resultados Y Discusiónunclassified

Análisis de cerámicas romanas Terra Sigillata mediante espectroscopía de plasmas inducidos por láser (LIPS)

López¹,

Nicolás²,

Mateo³

et al. 2005

Bol. Soc. Esp. Ceram. Vidr.

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En este trabajo se ha aplicado la espectroscopía de plasmas inducidos por láser (LIPS) al análisis elemental de cerámicas romanas Terra Sigillata procedentes de distintos centros de producción. Para cada muestra se han obtenido los espectros característicos tanto del engobe como de la pasta y los perfiles de composición en profundidad. En todos los casos analizados, los elementos Fe y Ca son los que marcan la transición entre el engobe y la pasta en estas cerámicas. El gradiente de composición de otros elementos tales como el Si o el Al presenta diferencias entre las distintas piezas. Se han realizado también análisis complementarios por microscopía electrónica de barrido con espectroscopía de rayos X (SEM -EDX) para determinar las diferencias morfológicas y obtener una verificación de la composición química. Palabras clave: LIPS, Terra Sigillata, perfil de composición, cerámicas arqueológicas Analysis of roman pottery Terra Sigillata by laser induced plasma spectroscopy (LIPS)Laser induced plasma spectroscopy (LIPS) has been applied for the elemental analysis of roman pottery Terra Sigillata from different ceramic production centers. For each sample, representative LIP spectra of slip and body were obtained in addition of compositional depth profiles. In all the cases investigated, calcium and iron are the elements which best define the transition between slip and body in these ceramic samples. Compositional gradient of other elements like silicon and aluminum depends on the samples. Moreover, complementary scanning electron microscopy coupled with energy dispersive X-ray spectroscopy (SEM -EDX) examinations were carried out to analyze morphological differences and to obtain verification of chemical results. Keywords: LIPS, Terra Sigillata, compositional depth profile, archaeological ceramics INTRODUCCIÓNLa Terra Sigillata es una cerámica fina de mesa típica de la Época Romana que se caracteriza por estar dotada de un engobe sinterizado que asemeja la apariencia de un barniz de tonos rojizos. La producción de Terra Sigillata se inició en Italia Central en el siglo I a.C. y desde allí se extendió por todo el Imperio, siendo popular hasta los siglos IV-V d.C. Sus restos son de gran interés arqueológico por las implicaciones económico-comerciales, puesto que se trata de objetos de extensivo comercio en el Imperio Romano [1], sirviendo además como indicadores de la capacidad artística y tecnológica desarrollada en la época. El examen científico de estas cerámicas puede aportar información valiosa a la investigación arqueológica tanto en la asignación de procedencias como en el redescubrimiento de las tecnologías de producción [2,3]. Con este propósito se han venido utilizando distintas técnicas de microscopía (óptica y electrónica) y espectroscopías de tipo electrónico, atómico, molecular, nuclear o de rayos-X; pudiendo establecerse una clasificación de las mismas en dos grandes grupos: aquellas técnicas que pueden aportar información cualitativa o cuantitativa de microdominios homogéneos en cada pieza [4][5][6][7]...

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Compositional analysis of Hispanic Terra Sigillata by laser-induced breakdown spectroscopy

Cited by 46 publications

References 30 publications

Laser Induced Breakdown Spectroscopy

Laser Induced Breakdown Spectroscopy

Analysis of natural and artificial ultramarine blue pigments using laser induced breakdown and pulsed Raman spectroscopy, statistical analysis and light microscopy

Análisis de cerámicas romanas Terra Sigillata mediante espectroscopía de plasmas inducidos por láser (LIPS)

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