2020
DOI: 10.1038/s41598-020-70151-6
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Suppression of self-absorption in laser-induced breakdown spectroscopy using a double pulse orthogonal configuration to create vacuum-like conditions in atmospheric air pressure

Abstract: Self-absorption, which is known to severely disturb identification of the emission peak intensity in emission-based spectroscopy, was first studied using ordinary single pulse laser-induced breakdown spectroscopy (LIBS). It was found that severe self-absorption, with an evident self-reversal, occurs in the resonance emission lines of high concentration Na, K, and Al, and thus it is impossible to obtain the linear calibration curve required for quantitative analysis. To overcome this problem, we introduce a dou… Show more

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Cited by 23 publications
(8 citation statements)
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“…There are several factors that can explain the less successful results of the S, MIN, MAX normalization methods. Among them, the most important are the possible presence of self-absorption [24] and matrix effects [23,25], which are unfortunately unavoidable. An extra problem arises from the formation of craters on the samples' surface, even though starch powder has been used for limiting crater formation.…”
Section: Univariate Analysis (Least Squares Regression (Lsr))mentioning
confidence: 99%
“…There are several factors that can explain the less successful results of the S, MIN, MAX normalization methods. Among them, the most important are the possible presence of self-absorption [24] and matrix effects [23,25], which are unfortunately unavoidable. An extra problem arises from the formation of craters on the samples' surface, even though starch powder has been used for limiting crater formation.…”
Section: Univariate Analysis (Least Squares Regression (Lsr))mentioning
confidence: 99%
“…Second, in ODP-LIBS, self-absorption effect can be significantly reduced in both reheating and pre-ablation schemes. [4,5] This will be very helpful for quantitative analysis if resonant lines are selected.…”
Section: Introductionmentioning
confidence: 99%
“…Since the LIBS emission peaks follow a Lorentzian distribution, different peak shapes result, depending on the signal intensity. Therefore, it is impossible to draw reliable conclusions regarding increases and decreases in LIBS signals from the comparison between low- and high-intensity peaks 16 , 17 . These shortcomings pose major challenges in clinical biomarker studies that use LIBS spectra and thus limit the reliability of analytical, quantitative assays, which should be used in clinical biomarker assays 18 .…”
Section: Introductionmentioning
confidence: 99%