9.3: Interferences in Absorption Spectroscopy
A spectral interference occurs when an analyte’s absorption line overlaps with an interferent’s absorption line or band. Because atomic absorption lines are so narrow, the overlap of two such lines seldom is a problem.
Spectral Interference: Types, Avoidance and Correction
The types of spectral interferences most commonly encountered for ICP-OES are discussed in the Spectral Interferences section of Part 15: ICP-OES Measurement of our Reliable Measurements series. You may wish to review this information before continuing.
6.3C: Spectral Interferences - Chemistry LibreTexts
In atomic absorption spectroscopy, this process is referred to as background correction. An alternative way of getting a broadened source signal to pass through the flame is known as the Smith-Hieftje method (named after the investigators who devised this method). The Smith-Hieftje method only uses a hollow cathode lamp.
Theoretical and experimental treatment of the spectral interferences …
2002年11月1日 · Spectral interferences, which are caused by atoms with absorption lines very close to the analyte absorption line, or by fine rotational lines of the molecular absorption band, can result in either positive or negative errors in the measurements of the concentration of the analyte, which is observed in the analytical curves.
Spectral line interferences in atomic absorption spectroscopy
Spectral line interferences may occur in atomic absorption spectroscopy when there is significant overlap of the primary-source, emission-line profile with the absorption line profiles of any interfering species in the flame.
There are a number of ways to deal with spectral interferences in ICP-OES: 1. Use the technique, but use standard addition to calibrate and analyze samples or 2. Use the calibration curve method with matrix matching for standards and samples or 3. Use the calibration curve method and do corrections for spectral interferences,
Diagnosis and correction methods for spectral interference in the ...
2023年9月1日 · In this publication, we demonstrate how Principal Component Analysis (PCA) can diagnose the potential presence of a spectral interference and how Multivariate Curve Resolution-Alternating Least Squares (MCR-ALS) can ultimately correct it if necessary using a LIBS imaging dataset obtained from the analysis of a complex rock sample.
Spectral interference occurs if wavelength separation of interfering species < instrument resolution. Results in enhancement of results (errors) if left uncorrected. Other elements present in the samples.
Spectral and non-spectral interferences in inductively coupled plasma ...
Inductively coupled plasma mass spectrometry of environmental and biological samples is often hampered by spectral and non-spectral interferences. Spectral interferences, caused by the limited resolution of the quadrupole mass spectrometer, can be eliminated in a variety of ways.
What is spectral interference, when does it occur? - BWBTech
2021年9月16日 · Spectral interference, or spectral overlap, is a term used by scientists who are interested in looking at the emission wavelengths of elements to classify data from a source of excited ions which contain a mixture of elements.