Calculation and optimization of sample identification by laser induced breakdown spectroscopy via correlation analysis

M. Lentjes, K. Dickmann, J. Meijer

Research output: Contribution to journalArticleAcademicpeer-review

16 Citations (Scopus)

Abstract

Linear correlation analysis may be used as a technique for the identification of samples with a very similar chemical composition by laser induced breakdown spectroscopy. The spectrum of the “unknown” sample is correlated with a library of reference spectra. The probability of identification by single shot analysis can be estimated by the method described in this paper. When a right identification is not obtained by single shot correlation analysis the accuracy can be increased by averaging spectra or by averaging the correlation coefficients. The number of spectra or correlation coefficients to be averaged to obtain a 99.9% right identification is evaluated. We found out that the number of spectra to be averaged is equal to the number of correlation coefficients to be averaged. The benefit of using averaged spectra over averaging correlation coefficients is a faster calculation.
Original languageUndefined
Pages (from-to)56-62
Number of pages7
JournalSpectrochimica acta. Part B : Atomic spectroscopy
Volume62
Issue number1
DOIs
Publication statusPublished - 2007

Keywords

  • Probability calculation
  • Normal distribution
  • METIS-239949
  • Laser induced breakdown spectroscopy
  • IR-78870
  • Gamma distribution
  • Linear correlation

Cite this

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title = "Calculation and optimization of sample identification by laser induced breakdown spectroscopy via correlation analysis",
abstract = "Linear correlation analysis may be used as a technique for the identification of samples with a very similar chemical composition by laser induced breakdown spectroscopy. The spectrum of the “unknown” sample is correlated with a library of reference spectra. The probability of identification by single shot analysis can be estimated by the method described in this paper. When a right identification is not obtained by single shot correlation analysis the accuracy can be increased by averaging spectra or by averaging the correlation coefficients. The number of spectra or correlation coefficients to be averaged to obtain a 99.9{\%} right identification is evaluated. We found out that the number of spectra to be averaged is equal to the number of correlation coefficients to be averaged. The benefit of using averaged spectra over averaging correlation coefficients is a faster calculation.",
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Calculation and optimization of sample identification by laser induced breakdown spectroscopy via correlation analysis. / Lentjes, M.; Dickmann, K.; Meijer, J.

In: Spectrochimica acta. Part B : Atomic spectroscopy, Vol. 62, No. 1, 2007, p. 56-62.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Calculation and optimization of sample identification by laser induced breakdown spectroscopy via correlation analysis

AU - Lentjes, M.

AU - Dickmann, K.

AU - Meijer, J.

PY - 2007

Y1 - 2007

N2 - Linear correlation analysis may be used as a technique for the identification of samples with a very similar chemical composition by laser induced breakdown spectroscopy. The spectrum of the “unknown” sample is correlated with a library of reference spectra. The probability of identification by single shot analysis can be estimated by the method described in this paper. When a right identification is not obtained by single shot correlation analysis the accuracy can be increased by averaging spectra or by averaging the correlation coefficients. The number of spectra or correlation coefficients to be averaged to obtain a 99.9% right identification is evaluated. We found out that the number of spectra to be averaged is equal to the number of correlation coefficients to be averaged. The benefit of using averaged spectra over averaging correlation coefficients is a faster calculation.

AB - Linear correlation analysis may be used as a technique for the identification of samples with a very similar chemical composition by laser induced breakdown spectroscopy. The spectrum of the “unknown” sample is correlated with a library of reference spectra. The probability of identification by single shot analysis can be estimated by the method described in this paper. When a right identification is not obtained by single shot correlation analysis the accuracy can be increased by averaging spectra or by averaging the correlation coefficients. The number of spectra or correlation coefficients to be averaged to obtain a 99.9% right identification is evaluated. We found out that the number of spectra to be averaged is equal to the number of correlation coefficients to be averaged. The benefit of using averaged spectra over averaging correlation coefficients is a faster calculation.

KW - Probability calculation

KW - Normal distribution

KW - METIS-239949

KW - Laser induced breakdown spectroscopy

KW - IR-78870

KW - Gamma distribution

KW - Linear correlation

U2 - 10.1016/j.sab.2006.11.009

DO - 10.1016/j.sab.2006.11.009

M3 - Article

VL - 62

SP - 56

EP - 62

JO - Spectrochimica acta. Part B : Atomic spectroscopy

JF - Spectrochimica acta. Part B : Atomic spectroscopy

SN - 0584-8547

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