Discrimination between authentic and false tax stamps from liquor bottles using laser-induced breakdown spectroscopy and chemometrics

Gonzaga, Fabiano Barbieri; Rocha, Wérickson Fortunato de Carvalho; Correa, Deleon Nascimento

doi:10.1016/j.sab.2015.04.011

Cited by 12 publications

(6 citation statements)

References 32 publications

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“…The authors also configured the laser to emit two consecutive pulses to increase the intensities of LIBS signal emission. Another study utilized Nd:YLF laser for tax stamp samples with a wavelength of 1053 nm as shown in Table 1, and this laser type used the lowest laser energy (600 µJ) compared to the other types [55].…”

Section: Sabri Et Al ________________________________________________...mentioning

confidence: 99%

“…Several researchers used Czerny-Turner [2,11,34,40,54,55], Echelle [4,7,47] and Ocean Optics [46,50] spectrometers in their studies. Czerny-Turner spectrometer is commonly used in LIBS.…”

Section: Sabri Et Al ________________________________________________...mentioning

confidence: 99%

“…The examination of questioned documents extends beyond written or printed texts on plain paper and includes various types of documents such as identity documents, stamps, banknotes, etc. Currently, LIBS has been applied to analyze identity cards [54], passports [54], banknotes [34], and tax stamps [55], expanding its use to different types of documents. Analysis of ink on banknotes by Król et al [34] proved the presence of Mn as the most frequent element.…”

Section: Detected Elements In Other Types Of Documentsmentioning

confidence: 99%

“…In a study conducted by Gonzaga et al [55], they examined authentic and false tax stamps from liquor bottles. Th elements such as Ca, Na, Ti, Mg, K, and H were found in these samples.…”

Section: Detected Elements In Other Types Of Documentsmentioning

confidence: 99%

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A Review of Laser-Induced Breakdown Spectroscopy (LIBS) for Document Examination: Fundamentals, Mechanism, and Application

Ahmad Sabri,

Md Rasid,

Abd Rashid

et al. 2024

Curr. Appl. Sci. Technol.

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Document examination is one of the main types of investigations in forensic science, particularly in cases involving questioned documents. These documents include assorted forms of written or printed texts on different substrates (paper, banknotes, etc.) with uncertain authenticity. Ink analysis plays a vital role in document examination. It is often focused on understanding the chemical composition of the ink, which can be colorants, solvents, vehicles, and additives. Document examiners utilize several analytical tools including laser-induced breakdown spectroscopy (LIBS). The use of this instrument has gained prominence for its ability to detect multiple elements, offer straightforward sample preparation, minimize sample destruction, and provide fast and accurate readings. This paper reviews previous research that employed LIBS for document examination, highlighting its modern applications and approaches in analysing various types of documents. Furthermore, this paper discusses the strengths and weaknesses of this instrument as a viable technique in the field of document examination.

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Section: Sabri Et Al ________________________________________________...mentioning

confidence: 99%

“…Several researchers used Czerny-Turner [2,11,34,40,54,55], Echelle [4,7,47] and Ocean Optics [46,50] spectrometers in their studies. Czerny-Turner spectrometer is commonly used in LIBS.…”

Section: Sabri Et Al ________________________________________________...mentioning

confidence: 99%

Section: Detected Elements In Other Types Of Documentsmentioning

confidence: 99%

“…In a study conducted by Gonzaga et al [55], they examined authentic and false tax stamps from liquor bottles. Th elements such as Ca, Na, Ti, Mg, K, and H were found in these samples.…”

Section: Detected Elements In Other Types Of Documentsmentioning

confidence: 99%

See 2 more Smart Citations

A Review of Laser-Induced Breakdown Spectroscopy (LIBS) for Document Examination: Fundamentals, Mechanism, and Application

Ahmad Sabri,

Md Rasid,

Abd Rashid

et al. 2024

Curr. Appl. Sci. Technol.

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show abstract

“…Partial least squares-discriminant analysis (PLS-DA) is one of the classical multivariate statistics that have been frequently employed for the modeling based on the LIBS data. [8][9][10][11][12] PLS-DA uses partial least squares (PLS) algorithm correlating two matrices, X and Y. 13 X is a data matrix composed of LIBS spectral intensities.…”

Section: Introductionmentioning

confidence: 99%

Two-Step Partial Least Squares-Discriminant Analysis Modeling for Accurate Classification of Edible Sea Salt Products Using Laser-Induced Breakdown Spectroscopy

et al. 2022

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Laser-induced breakdown spectroscopy (LIBS) has been widely applied to material classification in various fields, and partial least squares-discriminant analysis (PLS-DA) is one of the frequently used classical multivariate statistics to construct classification models based on the LIBS spectra. However, classification accuracy of the PLS-DA model is sensitive to the number of classes and their similarities. Considering this characteristic of PLS-DA, we suggest a two-step PLS-DA modeling approach to improve the classification accuracy. This strategy was demonstrated for a 6-class problem in which six commercial edible sea salts produced in Japan, South Korea, and France are classified using their LIBS spectra. At the first step, test spectra were sorted into four classes and one extended class, composed of the two other most confusing classes, and then the test spectra in the extended class were further classified into each of the two constituent classes which were modeled separately from the other four classes. This two-step classification has been found to remarkably improve the PLS-DA classification accuracy by maximizing the difference between the confusing classes in the second-step modeling.

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A simple method for forward variable selection and calibration: evaluation for compact and low-cost laser-induced breakdown spectroscopy system

et al. 2017

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This work presents a new method for forward variable selection and calibration and its evaluation for manganese determination in steel by laser-induced breakdown spectroscopy (LIBS). A compact and low-cost LIBS instrument was used, based on a microchip laser and a grating mini-spectrometer containing a non-intensified, non-gated, and non-cooled linear sensor array. Sixty steel samples were analyzed, with known manganese concentrations from 0.106 to 1.696 wt%. The spectra (1757 variables between 200 and 850 nm) were acquired under the continuous application of laser pulses at 100 Hz and using 80, 400, and 1000 ms integration times. The new method generated a mathematic combination of the selected variables and the results were calibrated against the manganese content by linear or quadratic regression. The best results were obtained using the spectra from all integration times together, with 31 selected variables and root mean square errors of cross-validation and prediction of 0.015 and 0.033, respectively. Compared to Jack-knife partial least squares regression, the new method presented lower prediction errors and numbers of selected variables, with the advantages of no data pretreatment and a simpler mathematic calculation. Graphical abstract New method for forward variable selection and calibration applied to manganese determination in steel by laser induced breakdown spectroscopy.

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Discrimination between authentic and false tax stamps from liquor bottles using laser-induced breakdown spectroscopy and chemometrics

Cited by 12 publications

References 32 publications

A Review of Laser-Induced Breakdown Spectroscopy (LIBS) for Document Examination: Fundamentals, Mechanism, and Application

A Review of Laser-Induced Breakdown Spectroscopy (LIBS) for Document Examination: Fundamentals, Mechanism, and Application

Two-Step Partial Least Squares-Discriminant Analysis Modeling for Accurate Classification of Edible Sea Salt Products Using Laser-Induced Breakdown Spectroscopy

A simple method for forward variable selection and calibration: evaluation for compact and low-cost laser-induced breakdown spectroscopy system

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