Methods for detecting and correcting inaccurate results in inductively coupled plasma-atomic emission spectrometry
- Bloomington, IN
A method for detecting and correcting inaccurate results in inductively coupled plasma-atomic emission spectrometry (ICP-AES). ICP-AES analysis is performed across a plurality of selected locations in the plasma on an unknown sample, collecting the light intensity at one or more selected wavelengths of one or more sought-for analytes, creating a first dataset. The first dataset is then calibrated with a calibration dataset creating a calibrated first dataset curve. If the calibrated first dataset curve has a variability along the location within the plasma for a selected wavelength, errors are present. Plasma-related errors are then corrected by diluting the unknown sample and performing the same ICP-AES analysis on the diluted unknown sample creating a calibrated second dataset curve (accounting for the dilution) for the one or more sought-for analytes. The cross-over point of the calibrated dataset curves yields the corrected value (free from plasma related errors) for each sought-for analyte.
- Research Organization:
- Indiana University Foundation
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- FG02-98ER14890
- Assignee:
- The United States of America as represented by the United States Department of Energy (Washington, DC)
- Patent Number(s):
- 7,768,639
- Application Number:
- 12/212,915
- OSTI ID:
- 992859
- Country of Publication:
- United States
- Language:
- English
Similar Records
Multi-Window Classical Least Squares Multivariate Calibration Methods for Quantitative ICP-AES Analyses
Evaluation of the effect of wavelength poisitioning errors on Kalman filtering results in inductively coupled plasma atomic emission spectrometry