Methods for detecting and correcting inaccurate results in inductively coupled plasma-atomic emission spectrometry
Abstract
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.
- Inventors:
-
- Bloomington, IN
- Issue Date:
- Research Org.:
- Indiana University Foundation
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 992859
- Patent Number(s):
- 7768639
- Application Number:
- 12/212,915
- Assignee:
- The United States of America as represented by the United States Department of Energy (Washington, DC)
- Patent Classifications (CPCs):
-
G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- DOE Contract Number:
- FG02-98ER14890
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
Citation Formats
Chan, George C. Y., and Hieftje, Gary M. Methods for detecting and correcting inaccurate results in inductively coupled plasma-atomic emission spectrometry. United States: N. p., 2010.
Web.
Chan, George C. Y., & Hieftje, Gary M. Methods for detecting and correcting inaccurate results in inductively coupled plasma-atomic emission spectrometry. United States.
Chan, George C. Y., and Hieftje, Gary M. Tue .
"Methods for detecting and correcting inaccurate results in inductively coupled plasma-atomic emission spectrometry". United States. https://www.osti.gov/servlets/purl/992859.
@article{osti_992859,
title = {Methods for detecting and correcting inaccurate results in inductively coupled plasma-atomic emission spectrometry},
author = {Chan, George C. Y. and Hieftje, Gary M},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2010},
month = {8}
}