Multivariate classification of pigments and inks using combined Raman spectroscopy and LIBS

Hoehse, Marek; Paul, Andrea; Gornushkin, Igor B.; Panne, Ulrich

doi:10.1007/s00216-011-5287-6

Cited by 137 publications

(81 citation statements)

References 30 publications

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“…As already stated, applied jointly, the two techniques present a cooperative analytical advantage, with elemental composition information obtained via LIBS analysis complementing the molecular information provided by Raman spectroscopy, thus leading to an integrated characterization of pigments and minerals, superior to those obtained with the individual Raman or LIBS data sets alone [21][22][23][24]. Particularly, in the context of wall painting analysis, research studies by Bruder et al [25] illustrate the complementarity of LIBS and Raman microscopy for the in situ analysis of fresco replicas while Westlake et al [26] have demonstrated the combined use of the techniques in the analysis of mural painting fragments, still performing analyses on small plaster fragments in the analytical laboratory.…”

Section: Introductionmentioning

confidence: 99%

A multi-technique approach, based on mobile/portable laser instruments, for the in situ pigment characterization of stone sculptures on the island of Crete dating from Venetian and Ottoman period

et al. 2016

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A versatile analytical methodology is presented, that combines the application of two mobile laser-based analytical techniques, Raman microscopy and laser-induced breakdown spectroscopy (LIBS), for the analysis of materials in historical and archaeological objects and monuments. In the present study, the proposed methodology was employed in the context of analytical campaigns aiming to investigate paint materials used on the island of Crete during the Venetian and Ottoman periods, thirteenth to nineteenth century CE. The first series of campaigns were conducted at the Historical Museum of Crete, Heraklion, Greece, and provided for the first time compositional data concerning the pigment palette used for painting Ottoman sculpture in Crete. In the second series, campaigns were performed outdoors for studying pigments in the sculptured door frames of two small medieval churches situated at rural locations in the greater Heraklion area. Raman and LIBS analyses gather complementary compositional data, molecular and elemental respectively, which, taken jointly, enable, in most cases, identification of pigments and accessory materials in paint layers, providing also stratigraphic information. With both instruments, measurements are performed directly on the surface of the objects or monuments, with no need for any sampling or sample preparation and thus analytical studies can be conducted rapidly and routinely in the context of a museum setting, a conservation laboratory or even outdoors. A standardized procedure that facilitates data collection and interpretation, interdisciplinary cooperation and presentation of results is adopted that optimizes the overall efficiency of the analytical campaigns.

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Section: Introductionmentioning

confidence: 99%

A multi-technique approach, based on mobile/portable laser instruments, for the in situ pigment characterization of stone sculptures on the island of Crete dating from Venetian and Ottoman period

et al. 2016

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“…However, such methods are invasive and time-consuming [6], and these disadvantages must be considered. Different approaches, such as Raman spectroscopy [7][8][9][10], UV-Vis spectroscopy [4,11], and IR spectroscopy [12], are based on the interaction of light with the substrate. Those methods ensure the physical integrity of the document, and yield data on organic and inorganic components of a sample.…”

Section: Introductionmentioning

confidence: 99%

Hyperspectral imaging coupled with chemometric analysis for non-invasive differentiation of black pens

et al. 2016

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Differentiation of the written text can be performed with a non-invasive and non-contact tool that connects conventional imaging methods with spectroscopy. Hyperspectral imaging (HSI) is a relatively new and rapid analytical technique that can be applied in forensic science disciplines. It allows an image of the sample to be acquired, with full spectral information within every pixel. For this paper, HSI and three statistical methods (hierarchical cluster analysis, principal component analysis, and spectral angle mapper) were used to distinguish between traces of modern black gel pen inks. Non-invasiveness and high efficiency are among the unquestionable advantages of ink differentiation using HSI. It is also less time-consuming than traditional methods such as chromatography. In this study, a set of 45 modern gel pen ink marks deposited on a paper sheet were registered. The spectral characteristics embodied in every pixel were extracted from an image and analysed using statistical methods, externally and directly on the hypercube. As a result, different black gel inks deposited on paper can be distinguished and classified into several groups, in a non-invasive manner.

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“…This technique has become important in recent years due to its variety of applications in areas such as mineralogy, forensics, biology and medicine [5][6][7][8][9]. It is currently used for the characterizat ion of drugs, bone structures, organic pesticides, among others [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Raman Spectroscopy: a Test Novel Technique for Quality Control In the Acetylsalicylic Acid

Martínez¹,

Bolaños²,

Chequer³

et al. 2012

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Raman spectroscopy (RS) is an inelastic scattering technique that is being recently applied in pharmaceutical applications. In this work this technique was applied to analyze the differences in concentrations of a commercial pharmaceutical form of an acetylsalicylic acid derivative present in tablets manufactured by five different laboratories (A, B, C, D and E). Meyer brand acetylsalicylic acid reagent was used to obtain spectral data as active principle. Five samp les of different laboratories were also analyzed. We used a Raman microscopy device Horiba-JY HR800 with an excitation source of 830 n m and 17 mW. Raw data were analyzed by an arith metic difference between the active substance from each different laboratory sample. Principal co mponent analysis (PCA) was also applied to the spectral set to verify the differences in each pharmaceutical form of acetylsalicylic acid. We found a correlation o f 0.7 between laboratory A and the active substance, and 0.98 between all spectra of the same laboratory A, we conclude that this drug was elaborated with better quality control. Results indicate that Raman spectroscopy can be applied in the pharmaceutical industry to determine adulteration or alteration in pharmaceutical formu lations. We have demonstrate that RS together with PCA can be used as a fast and nondestructive method to determine the characteristics of the molecules present in commercially available drugs with very short acquisition times of few seconds.

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Multivariate classification of pigments and inks using combined Raman spectroscopy and LIBS

Cited by 137 publications

References 30 publications

A multi-technique approach, based on mobile/portable laser instruments, for the in situ pigment characterization of stone sculptures on the island of Crete dating from Venetian and Ottoman period

A multi-technique approach, based on mobile/portable laser instruments, for the in situ pigment characterization of stone sculptures on the island of Crete dating from Venetian and Ottoman period

Hyperspectral imaging coupled with chemometric analysis for non-invasive differentiation of black pens

Raman Spectroscopy: a Test Novel Technique for Quality Control In the Acetylsalicylic Acid

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