Double-pulse laser ablation sampling: Enhancement of analyte emission by a second laser pulse at 213 nm

Cai, Bruno Yue; Mao, Xianglei; Hou, Haiyun; Zorba, Vassilia; Russo, Richard E.; Cheung, Nai Ho

doi:10.1016/j.sab.2015.05.010

Cited by 20 publications

(10 citation statements)

References 15 publications

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“…This ps laser pulses are employed to produce the fast electron from the laser ablated zircaloy target for further excitation of He by the fast electron bombardment. This two-laser arrangement is different from the conventional double pulse experiments [20][21][22][23][24][25][26][27][28][29][30] where the two lasers are employed for direct ablation and further excitation of the ablated atoms. Although the ps laser is employed to serve the specific role of producing fast electrons from the target, its irradiation on the target will inevitably generate emission from the ablated atoms and the He atoms in the ambient gas near the target surface.…”

Section: Methodsmentioning

confidence: 99%

Signal enhancement of neutral He emission lines by fast electron bombardment of laser-induced He plasma

et al. 2016

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A time-resolved spectroscopic study is performed on the enhancement signals of He gas plasma emission using nanosecond (ns) and picosecond (ps) lasers in an orthogonal configuration. The ns laser is used for the He gas plasma generation and the ps laser is employed for the ejection of fast electrons from a metal target, which serves to excite subsequently the He atoms in the plasma. The study is focused on the most dominant He I 587.6 nm and He I 667.8 nm emission lines suggested to be responsible for the He-assisted excitation (HAE) mechanism. The time-dependent intensity enhancements induced by the fast electrons generated with a series of delayed ps laser ablations are deduced from the intensity time profiles of both He emission lines. The results clearly lead to the conclusion that the metastable excited triplet He atoms are actually the species overwhelmingly produced during the recombination process in the ns laser-induced He gas plasma. These metastable He atoms are believed to serve as the major energy source for the delayed excitation of analyte atoms in ns laser-induced breakdown spectroscopy (LIBS) using He ambient gas.

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Section: Methodsmentioning

confidence: 99%

Signal enhancement of neutral He emission lines by fast electron bombardment of laser-induced He plasma

et al. 2016

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“…A double-pulse LA sampling system has been proposed for minimally destructive multi-element analysis. 50 The performance of a 266 to 213 nm double-pulse scheme was compared with that of a single 266 nm pulse scheme. The initial laser pulse at 266 nm ablated a mica sample and 10 ns later the second pulse, at 213 nm and 64 mJ cm À2 , orthogonally intercepted the gas plume to enhance the analyte signal.…”

Section: Vapour Generationmentioning

confidence: 99%

Atomic spectrometry update: review of advances in atomic spectrometry and related techniques

Evans

Pisonero

Smith

et al. 2016

J. Anal. At. Spectrom.

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SUMMARY OF CONTENTS This review covers developments in 'Atomic Spectrometry'. It covers atomic emission, absorption, fluorescence and mass spectrometry, but excludes material on speciation and coupled techniques which is included in a separate review. It should be read in conjunctionwith the other related reviews in the series. [1][2][3][4][5][6] Sample introductionThis section covers developments in sample introduction for all instrumental methods. LiquidsLiquid sample introduction relates to methods wherein the sample is introduced into the instrument in the form of a liquid, such as through nebulization or into a thermal vaporizer; whereas in vapour generation the sample is initially in the form of a liquid but is converted to a vapour prior to introduction into the instrument. Sample pre-treatment.A general review of on-line preconcentration for ICP-MS has been published by Das et al. 7 , covering solid phase methods and including 63 references. Several reviews of sample pretreatment methods used for atomic spectrometry are worth noting because they focus on specific areas: Kocurova et al. 8and Jain and Verma 9 have reviewed advances in DLLME (53 references) and SDME (407 references) respectively; Zhao et al. the same authors studied the stability of the labelled complexes at different pH and temperature, and when subject to separation using LC. They reported a significant decrease in stability when LC separation was used, and some degradation at 37 °C compared to 2 °C.Li et al. An immunoassay-linked method using gold nano-particles has been developed by Jarujamrus et al. 33 . In this approach the monoclonal antibody-chloramphenicol was attached to a solid support. Antigen-chloramphenicol was labelled with gold nano-particles (10 nm) at pH 9.5, attached to a bovine serum albumin protein and mixed with unlabelled antigenchloramphenicol, which was then added to the antibody-chloramphenicol. for U and Th respectively in water samples.

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“…To improve the sensitivity, a variety of methods have been developed. Some of these methods improve the LIBS signal intensity by changing the LIBS setup, such as adding a second laser pulse for secondary heating of the plasma [26][27][28][29][30]. In other methods, the sensitivity is improved by chemical treatment of the sample, such as chemical replacement to preconcentrate the element of interest in the sample [31][32][33][34].…”

Section: Introductionmentioning

confidence: 99%

Improving the Detection Sensitivity for Laser-Induced Breakdown Spectroscopy: A Review

Dong

2020

Front. Phys.

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Laser-induced breakdown spectroscopy (LIBS) is fast, on-line, causes little sample damage, and can be applied in remote field locations. In recent years, LIBS has been widely used in many fields of scientific research for element detection. Further application of LIBS is limited by the strong matrix effect, poor repeatability, and relatively weak detection sensitivity. The detection sensitivity is an important factor and needs to be improved for LIBS detection of minor or trace elements in samples. A variety of methods have been developed to improve detection sensitivity of LIBS. In this invited review paper, we discuss improvements in the LIBS detection sensitivity achieved with physical enhancement methods, chemical enhancement methods, mathematical methods, and combinations of multiple methods. We discuss the enhancement mechanisms, sensitivity improvements, configurations, and effects of key factors for various methods. The advantages, disadvantages, and real-time capabilities of these methods are reviewed. Finally, new trends and future perspectives for LIBS as an efficient analytical tool are discussed.

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Double-pulse laser ablation sampling: Enhancement of analyte emission by a second laser pulse at 213 nm

Cited by 20 publications

References 15 publications

Signal enhancement of neutral He emission lines by fast electron bombardment of laser-induced He plasma

Signal enhancement of neutral He emission lines by fast electron bombardment of laser-induced He plasma

Atomic spectrometry update: review of advances in atomic spectrometry and related techniques

Improving the Detection Sensitivity for Laser-Induced Breakdown Spectroscopy: A Review

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