An Assessment of the Potential of Laser-Induced Breakdown Spectroscopy (LIBS) for the Analysis of Cesium in Liquid Samples of Biological Origin

Metzinger, Anikó; Kovács‐Széles, Éva; Almási, I.; Galbács, Gábor

doi:10.1366/13-07297

Cited by 39 publications

(12 citation statements)

References 19 publications

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“…The drawback of the method lies in the presence of emission lines from the support material, which might interfere with the analytical lines from the liquid or prevent the measurement of some trace elements also present in the substrate. 30 For this reason, in the following we have chosen a silica wafer as substrate because it is available at high guaranteed purity and relatively low cost, considering that the substrate area necessary per sample is less than 1 cm 2 .…”

Section: Resultsmentioning

confidence: 99%

“…Another experimental approach consists of placing an evaporating liquid (e.g., water) on a solid substrate and probing its residues after drying the sample close to room temperature, 9,16–18,30,31 the latter condition being necessary to prevent losses of volatile components. This process is time consuming and produces a non-uniform residue distribution, which affects element quantification.…”

Section: Introductionmentioning

confidence: 99%

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Sample Preparation for Repeated Measurements on a Single Liquid Droplet Using Laser-Induced Breakdown Spectroscopy

et al. 2017

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We studied changes in laser-induced breakdown spectroscopy (LIBS) signal intensity with the thickness of a liquid layer placed on a solid substrate, where an easily evaporating methanol sample was used. For a certain optimal liquid film thickness we obtained a manifold increase of the LIBS signal from methanol. Progressive liquid film thinning leads to a reduction and a successive disappearance of laser-induced splashes; the latter condition drastically reduces the sample consumption and allows measurements to be repeated many times on a single liquid droplet. In following, we developed two methods for actively controlled deformation, i.e., thinning of a liquid droplet (volume ∼10 µl) prior to its sampling by LIBS. Control of the droplet's height was achieved on a Si-SiO wafer substrate by electro-wetting in the case of water solutions or by target rotation in the case of viscous liquids. The chosen substrate also has the advantages of low cost, easy manipulation, and very high purity, thus minimizing interference with analytes. Through the droplet deformation, in a single-pulse excitation at moderate laser energy (70 mJ), we clearly detected Fe and Mn in peanut oil, which represent trace elements in edible oils (∼ 1 part per billion), according to results published in the literature.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Sample Preparation for Repeated Measurements on a Single Liquid Droplet Using Laser-Induced Breakdown Spectroscopy

et al. 2017

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“…148 As aplicações biológicas em LIBS são principalmente de natureza qualitativa, mas também ocorrem análises quantitativas. A aplicação da bio-LIBS estende-se a uma ampla variedade de amostras como, sangue, 158 cabelo, 238 unhas, 239 fígado de pacientes com mal de Wilson, 240 urina, 241 e dentes. 242 O grande potencial da LIBS nesse campo é que não é necessário nenhum conhecimento prévio sobre as sequências de ácido nucléico ou anticorpos contra antígenos bacterianos conhecidos, em contraste com as técnicas de diagnóstico clínico estabelecidas.…”

Section: Biológicas E Farmacêuticasunclassified

Laser Induced-Breakdown Spectroscopy (Libs): Histórico, Fundamentos, Aplicações E Potencialidades

Costa¹,

Augusto²,

Castro³

et al. 2019

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This review attempts to present a broad view of the technique laser-induced breakdown spectroscopy (LIBS), since its origin, fundamentals, sample preparation strategies, use of chemometric tools for data processing, the advantages and limitations with regard to qualitative and quantitative analysis, aplications and future trends as an analytical technique that is in consolidation in analytical chemistry. LIBS is a rapid and versatile, which is able of providing qualitative and quantitative analytical information for practically any sample, in a virtually non-destructive way, without any substantial sample preparation. The instrumentation is simple, robust, compact, and enables remote analysis. The advancement of the LIBS applications in the areas of agriculture, environmental, food, biological/pharmaceutical, forensic, metallurgy and electronic waste were discussed in detail in this review. We consider that this review will be an important tool concerning dissemination of the LIBS, mainly for audience of undergraduate courses, and disciplines related to instrumental analysis.

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“…Direct analysis of Cs in the droplets of biological fluid samples, urine and blood serum, was also performed [39]. They used Zn metallic substrate by forming small pockets to confine the droplets and create a layer of solid deposit after drying.…”

Section: Introductionmentioning

confidence: 99%

Development and validation of a laser-induced breakdown spectroscopic method for ultra-trace determination of Cu, Mn, Cd and Pb metals in aqueous droplets after drying

Aras

Yalçın

2016

Talanta

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Keywords:Laser-induced breakdown spectroscopy Liquid droplet analysis Oxidized silicon wafer substrate (Si þ SiO 2 ) a b s t r a c tThe present study reports a fast and accurate methodology for laser-induced breakdown spectroscopic, LIBS, analysis of aqueous samples for environmental monitoring purposes. This methodology has two important attributes: one is the use of a 300 nm oxide coated silicon wafer substrate (Siþ SiO 2 ) for the first time for manual injection of 0.5 microliter aqueous metal solutions, and two is the use of high energy laser pulses focused outside the minimum focus position of a plano convex lens at which relatively large laser beam spot covers the entire droplet area for plasma formation. Optimization of instrumental LIBS parameters like detector delay time, gate width and laser energy has been performed to maximize atomic emission signal of target analytes; Cu, Mn, Cd and Pb. Under the optimal conditions, calibration curves were constructed and enhancements in the LIBS emission signal were obtained compared to the results of similar studies given in the literature. The analytical capability of the LIBS technique in liquid analysis has been improved. Absolute detection limits of 1.3 pg Cu, 3.3 pg Mn, 79 pg Cd and 48 pg Pb in 0.5 microliter volume of droplets were obtained from single shot analysis of five sequential droplets. The applicability of the proposed methodology to real water samples was tested on the Certified Reference Material, Trace Metals in Drinking Water, CRM-TMDW and on ICP multi-element standard samples. The accuracy of the method was found at a level of minimum 92% with relative standard deviations of at most 20%. Results suggest that 300 nm oxide coated silicon wafer has an excellent potential to be used as a substrate for direct analysis of contaminants in water supplies by LIBS and further research, development and engineering will increase the performance and applicability of the methodology.

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An Assessment of the Potential of Laser-Induced Breakdown Spectroscopy (LIBS) for the Analysis of Cesium in Liquid Samples of Biological Origin

Cited by 39 publications

References 19 publications

Sample Preparation for Repeated Measurements on a Single Liquid Droplet Using Laser-Induced Breakdown Spectroscopy

Sample Preparation for Repeated Measurements on a Single Liquid Droplet Using Laser-Induced Breakdown Spectroscopy

Laser Induced-Breakdown Spectroscopy (Libs): Histórico, Fundamentos, Aplicações E Potencialidades

Development and validation of a laser-induced breakdown spectroscopic method for ultra-trace determination of Cu, Mn, Cd and Pb metals in aqueous droplets after drying

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