Research on the Fitting Methods of Calibration Curve for Atomic Emission Spectrum Analysis
- DOI
- 10.2991/iiicec-15.2015.234How to use a DOI?
- Keywords
- Spectrum analysis; Calibration curve; Nonlinear fitting; Weighted formula
- Abstract
Based on the Lomakin-Schiebe formula and by means of nonlinear weighted maximum likelihood estimate (NWMLE), the calibration curve fitting methods for atomic emission spectrum (AES) analysis were strictly deduced and the regression equations on the curve parameters were obtained. All the parameters of the calibration curve by numerical calculation methods were calculated. The certified reference materials (CRM) of solid copper alloy were excited by the high-speed spark spectrum excitation source; the spectral data were measured by the photoelectric direct reading spectrometer. The experimental laws on the relationship with relative standard deviation (RSD) of the measured data and the element mass concentration and the new form empirical formula for the weighted were worked out. The calibration curves of two elements in the bronze alloy CRM were established in line with the experimental data and the NWMLE method, and the instrument constants and self-absorption coefficients were measured. The results showed that: 334.5nm emission line of Zn in range of 0.20 ~ 0.96% concentrations was self-absorption, the 349.3nm emission line of Ni in range of 0.10 ~ 3.96% concentrations was clearly self-absorption. Analysis of the experimental data indicated the NWMLE method was of feasibility and broad applicability on the AES analysis.
- Copyright
- © 2015, the Authors. Published by Atlantis Press.
- Open Access
- This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).
Cite this article
TY - CONF AU - Ribo Ning AU - Qian Li AU - Songning Xu PY - 2015/03 DA - 2015/03 TI - Research on the Fitting Methods of Calibration Curve for Atomic Emission Spectrum Analysis BT - Proceedings of the 2015 International Industrial Informatics and Computer Engineering Conference PB - Atlantis Press SP - 1047 EP - 1052 SN - 2352-538X UR - https://doi.org/10.2991/iiicec-15.2015.234 DO - 10.2991/iiicec-15.2015.234 ID - Ning2015/03 ER -