# LIBS Info: Element Analysis

Title | Authors | Material | Detector | Spectrometer | Software |
---|---|---|---|---|---|

Classical univariate calibration and partial least squares for quantitative analysis of brass samples by laser-induced breakdown spectroscopy | Jose Manuel Andrade, Gabriele Cristoforetti, S. Legnaioli, Giulia Lorenzetti, V. Palleschi, Abdallah A. Shaltout | Brass | Ocean Optics LIBS2500+ | Ocean Optics LIBS2500+ | |

Laser: | Nd:YAG Nonenm 50.0000mJ 1.000Hz |
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Gate Delay: | 1.000us | ||||

Gate Width: | 2100.000us | ||||

PLS is compared with standard Univariate Calibration in the analysis of brass. In this case, the justification is speed of development of calibration - good traditional calibration curves take much longer than PLS. For both analyses, the Cu figure was the difference between the sum of the other calculated concentrations and 100%. The conclusion is that while the CC gave better results on the unknown sample, the PLS gave acceptable results for the time invested. |

Element | Detection Limit (ppm) | Wavelength (nm) | Other Wavelengths (nm) | Calibration Method | Calibration Range (ppm) | Notes |
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Element | RMSE (ppm) | Wavelength (nm) | Calibration Method | Notes |
---|---|---|---|---|

Cu | 1.7000 % | -10.0000 | Univariate Calibration | Cu determined by summing other elements and subtracting from 100% |

Zn | 0.5000 % | 250.1990 | Univariate Calibration | |

Pb | 0.0010 % | 405.7810 | Univariate Calibration | |

Fe | 0.0050 % | 238.2040 | Univariate Calibration | |

Cu | 2.7000 % | -10.0000 | Partial Least Squares | Partial Least Squares. Cu determined from summing other elements and subtracting from 100% |

Zn | 1.5000 % | -10.0000 | Partial Least Squares | Partial Least Squares analysis |

Pb | 0.0140 % | -10.0000 | Partial Least Squares | Partial Least Squares analysis |

Sn | 0.0400 % | -10.0000 | Partial Least Squares | Partial Least Squares analysis |

Fe | 0.0140 % | -10.0000 | Partial Least Squares | Partial Least Squares. |