Determination of chlorine, sulfur and carbon in reinforced concrete structures by double-pulse laser-induced breakdown spectroscopy

Лабутин, Т.А.; Popov, A. M.; Zaytsev, Sergey M.; Зоров, Н. Б.; Belkov, M. V.; Kiris, V. V.; Raikov, S. N.

doi:10.1016/j.sab.2014.06.021

Cited by 60 publications

(21 citation statements)

References 24 publications

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“…[2][3][4][5][6][7][8][9] In addition to controlling the elemental content, investigating the isotopic composition of Cl can be of interest in different situations, as it may help, for instance, to track the source or the fate of different Cl species in the environment, or in biological fluids, or help in elucidating geochemical processes. Cl is used in many different fields such as production of chlorinated solvents and other chemicals, water purification, plastics production and pulp and paper manufacture, 1 thus making it necessary to control the presence of this element at trace levels in a wide variety of samples.…”

Section: Introductionmentioning

confidence: 99%

Chlorine isotope determination via the monitoring of the AlCl molecule by high-resolution continuum source graphite furnace molecular absorption spectrometry – a case study

Nakadi

Veiga

Aramendía

et al. 2015

J. Anal. At. Spectrom.

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This work investigates the possibility of obtaining isotopic information via the monitoring of the absorption spectra of a gaseous diatomic molecule generated in a graphite furnace and using a high-resolution (approx. 1.5 pm per pixel) monochromator (HR CS GFMAS). To test this concept, Cl was chosen as analyte and AlCl as the target species. The results demonstrate that, unlike what occurs with atomic spectra, under optimum conditions it is possible to acquire isotopic information by HR CS GFMAS in a straightforward way, as it is feasible to observe band heads for each Cl isotope (actually, for Al 35 Cl and Al 37 Cl) that are separated, i.e., they act like two different molecules absorbing at different wavelengths.The method proposed, based upon addition of both Pd and Al and the selection of peak height values, enables Cl isotopic analysis with precision values around 2% RSD for solutions with Cl contents at the mg L -1 level. Accurate values, within this uncertainty, can be directly obtained without requiring any method for mass bias correction. The potential of 2 isotope dilution for calibration is also explored, and it is proven how this approach can help in providing accurate results in situations where the occurrence of chemical interferences, a case frequently encountered for the HR CS GFMAS technique, hampers the use of other calibration approaches, as demonstrated for water analysis.

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Section: Introductionmentioning

confidence: 99%

Chlorine isotope determination via the monitoring of the AlCl molecule by high-resolution continuum source graphite furnace molecular absorption spectrometry – a case study

Nakadi

Veiga

Aramendía

et al. 2015

J. Anal. At. Spectrom.

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“…ЛИЭС -один из методов атомно-эмиссионного спектрального анализа, в котором анализируются спектры излучения лазерной плазмы в малом объеме (глубина проникновения в образец менее 10 мкм). В работах [2,3] показаны возможности ЛИЭС по определению продуктов коррозии в бетоне.…”

Section: ключевые слова: железобетонная конструкция коррозия лазернunclassified

“…В конструкции на основе метода ЛИЭС используется светоделитель, разделяющий поток отраженного света на две части. Длина волны лазера составляет 532 нм, а спектр большинства анализируемых элементов находится в диапазоне от 400 до 900 нм [2,3,7]. В случае применения КРС используется дихроичное зеркало, выполняющее функцию отсечения рассеянных световых лучей.…”

Section: ключевые слова: железобетонная конструкция коррозия лазернunclassified

System of optical probe positioning for diagnosing internal surface of hollow reinforced concrete structures

Kuznetsov¹,

Bryukhova²,

Demin³

2019

Izv. vysš. učebn. zaved., Priborostr.

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Actual problems of diagnosing the corrosion condition of hollow reinforced concrete structures are considered using reinforced concrete supports of the contact network as an example. Existing methods of diagnosing hollow reinforced concrete structures are discussed, advantages and disadvantages of these methods are revealed. The method of laser spectroscopy is reported to be the most promising approach to solving the problem due to its high reliability and the possibility to transmit laser radiation by fiber optic cable. A new design solution is proposed for positioning an optical probe inside a hollow structure to check the surface of the underground part of the reinforced concrete support. The optical probe is designed to determine the quantitative composition of corrosion products released to the surface of concrete by means of laser spectroscopy. A diagram of the optical sensor of the proposed device is presented, the sensor design is described. The proposed device allows to obtain quantitative information on the concentrations of corrosion products on the surface of reinforced concrete structure. Thus, by performing measurements on the surface and evaluating the condition of the reinforcement, it is possible to predict the residual strength of the supports, depending on the location of the point of greatest corrosion attack.

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“…For S analysis using LIBS, three spectral regions are generally considered: (1) vacuum ultraviolet (UV), 30,31 (2) visible (Vis), 31,32 and 3near-infrared (NIR) spectral regions. 31,[33][34][35] Herein, the NIR region, where the three S(I) lines are located at 921.287, 922.809, and 923.754 nm, was selected. Helium ambient gas was used to enhance the S(I) line intensity.…”

Section: Laser-induced Breakdown Spectroscopymentioning

confidence: 99%

Laser-Ablation Sampling for Accurate Analysis of Sulfur in Edible Salts

et al. 2017

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We evaluated the performance of laser ablation analysis techniques such as laser-induced breakdown spectroscopy (LIBS), laser ablation inductively coupled optical emission spectrometry (LA-ICP-OES), and laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS), in comparison with that of ICP-OES using aqueous solutions for the quantification of sulfur (S) in edible salts from different geographical origins. We found that the laser ablation based sampling techniques were not influenced by loss of S, which was observed in ICP-OES with aqueous solutions for a certain salt upon their dissolution in aqueous solutions, originating from the formation of volatile species and precipitates upon their dilution in water. Although detection of S using direct laser sampling with LA-ICP-MS has well-known isobaric and polyatomic interferences, LIBS and LA-ICP-OES showed good accuracy in the detection of S for all salts. LIBS also provided the ability to identify the dominant chemical form in which S is present in salts. Correlation between S and oxygen, observed in LIBS spectra, provided chemical information about the presence of S or [Formula: see text], which are associated with the origin and quality of edible salts.

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Determination of chlorine, sulfur and carbon in reinforced concrete structures by double-pulse laser-induced breakdown spectroscopy

Cited by 60 publications

References 24 publications

Chlorine isotope determination via the monitoring of the AlCl molecule by high-resolution continuum source graphite furnace molecular absorption spectrometry – a case study

Chlorine isotope determination via the monitoring of the AlCl molecule by high-resolution continuum source graphite furnace molecular absorption spectrometry – a case study

System of optical probe positioning for diagnosing internal surface of hollow reinforced concrete structures

Laser-Ablation Sampling for Accurate Analysis of Sulfur in Edible Salts

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