Partial least squares regression for problem solving in precious metal analysis by laser induced breakdown spectrometry

The application of laser induced breakdown spectrometry for the quantitative determination of gold and silver in Au–Ag–Cu alloys is proposed. Laser induced plasma emission spectra in the ultraviolet region were studied in order to characterize the spectral information from time-integrated data. The multivariate calibration method known as partial least squares regression type 1 was used for calibration and prediction purposes. Satisfactory results were obtained for the determination of gold and silver without temporal resolution strategies. Since the employment of this chemometric algorithm was a good alternative for simplification of the experimental setup, a rapid, simple and low cost method is thus proposed for the determination of noble metals in jewelry pieces.

[1]  F. Maessen,et al.  An assessment of the laser microprobe analyzer as a tool for quantitative analysis in atomic emission spectrometry , 1979 .

[2]  J. Laserna,et al.  Imaging and space-resolved spectroscopy in the XeCl laser ablation of noble metals with charge-coupled device detection , 1994 .

[3]  M. Sabsabi,et al.  Quantitative analysis of additives in solid zinc alloys by laser-induced plasma spectrometry , 1997 .

[4]  D. E. Kim,et al.  Quantitative Analysis of Aluminum Impurities in Zinc Alloy by Laser-Induced Breakdown Spectroscopy , 1997 .

[5]  K. Wrobel,et al.  Spectrophotometric determination of Allura Red (R40) in soft drink powders using the universal calibration matrix for partial least squares multivariate method , 1996 .

[6]  V. Majidi,et al.  Time-resolved emission characteristics and temperature profiles of laser-induced plasmas in helium , 1994 .

[7]  E. V. Thomas,et al.  COMPARISON OF MULTIVARIATE CALIBRATION METHODS FOR QUANTITATIVE SPECTRAL ANALYSIS , 1990 .

[8]  L. Kozma,et al.  Basic investigations of nanosecond laser-induced plasma emission kinetics for quantitative elemental microanalysis of high alloys , 1995 .

[9]  J. D. Winefordner,et al.  Recent trends and the future of laser-induced plasma spectroscopy , 1998 .

[10]  L. Kozma,et al.  Time-resolved optical emission spectrometry of Q-switched Nd:YAG laser-induced plasmas from copper targets in air at atmospheric pressure , 1995 .

[11]  O. Mikami,et al.  Effect of argon pressure on spectral emission of a plasma produced by a laser microprobe , 1992 .

[12]  M. Owens,et al.  Effects of High-Pressure Buffer Gases on Emission from Laser-Induced Plasmas , 1991 .

[13]  Yong‐Ill Lee,et al.  Novel and Recent Applications of Elemental Determination by Laser-Induced Breakdown Spectrometry , 1999 .

[14]  G. L. Paul,et al.  Time-Resolved Laser-Induced Breakdown Spectroscopy of Iron Ore , 1990 .

[15]  V. Cerdà,et al.  Resolution of a multicomponent polycyclic aromatic hydrocarbon system in micellar media by linear variable angle fluorescence applying distinct chemometric techniques , 1998 .

[16]  E. V. Thomas,et al.  Partial least-squares methods for spectral analyses. 1. Relation to other quantitative calibration methods and the extraction of qualitative information , 1988 .

[17]  J. Laserna,et al.  Removal of Air Interference in Laser-induced Breakdown Spectrometry Monitored by Spatially and Temporally Resolved Charge-coupled Device Measurements , 1997 .

[18]  T. L. Thiem,et al.  Interaction of an Excimer-Laser Beam with Metals. Part III: The Effect of a Controlled Atmosphere in Laser-Ablated Plasma Emission , 1992 .

[19]  J. Nevado,et al.  Simultaneous fluorimetric determination of pyridoxal, pyridoxamine and pyridoxic acid by partial least squares using non-linear variable angle synchronous spectra , 1998 .

[20]  P. Mauchien,et al.  Characterization by emission spectrometry of a laser-produced plasma from a copper target in air at atmospheric pressure , 1993 .

[21]  S. Rutan,et al.  Characterization of the sources of variation affecting near-infrared spectroscopy using chemometric methods. , 1998, Analytical chemistry.