Detection sensitivity of laser-induced breakdown spectroscopy for Cr II in liquid samples

Nilesh, K.; Awadhesh, K.; Kumar, Atul; Thakur, Surya N.

doi:10.1364/ao.47.00g105

Cited by 42 publications

(20 citation statements)

References 30 publications

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“…Recently, it was shown that even an addition of small quantities of Co and/or Cd to a distilled water increases the LOD of Cr from 1.1 up to 2.0 ppm [28]. Another example of a strong matrix effect is reported in [29], where the LODs both of Na and Mg increase for 20-25 % when passing from NaCl or MgCl 2 dissolved in pure water to the mixed solution, containing the both salts.…”

Section: Sampling Of Liquid Surface Droplet and Aerosolmentioning

confidence: 99%

“…In the first reported LIBS measurements on a liquid jet only 8 fg of Na was detected by a single shot signal acquisition [9]. In following, different experiments were performed on the jets with laminar flow and thickness between 0.2 and 1 mm [28,[31][32][33][34]. The maximum plasma intensity was obtained for focusing a beam behind the frontal jet surface, on way that the largest sample volume exceeds the LIB threshold for the given liquid and the excitation parameters [31].…”

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LIBS Analysis of Liquids and of Materials Inside Liquids

Lazic

2014

Springer Series in Optical Sciences

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Abbreviations and Symbols CILaser induced plasma formation on or inside liquids is characterized by large energy losses due to liquid evaporation. Ablation of a liquid surface is followed by hydro-dynamical instabilities and splashing. Plasma generation inside bulk liquids is affected by the light absorption and scattering, and it is accompanied by intense pressure waves and successive vapor cavitation. Efficient LIBS analyses in presence of liquids require different considerations; the examples are reported and discussed in following. IntroductionLaser induced plasma formation has the irradiance threshold dependent on the sample density, and generally it progressively reduces when passing from gases, to liquids and then to solids. Excluding the losses along the beam path, this means that less laser energy is required for ablation of dry or submerged solid materials than for ablation of a liquid or for generating breakdown inside liquids. Plasma formation in presence of liquids is not efficient because a great portion of the laser energy is expended for the liquid vaporization; this strongly reduces the energy available for the plasma excitation. It has been estimated that about 75 % of the input radiation is consumed for vaporization during laser induced breakdown (LIB) inside water [1]. Furthermore, both water and organic solutions contain hydrogen, which contributes to a rapid thermalization and cooling of the formed plasma. Once the plasma is created in liquids, the high density and nearly incompressible medium strongly confines the plume; the corresponding effects on the plasma evolution and LIBS signal are recently reviewed [2]. Laser ablation (LA) of liquids by short, intense pulses is a complex process where the liquid surface is no longer in equilibrium with the surrounding vapor; this results in a very high net mass flux from the sample surface to the surrounding [3 and references therein]. The high mass flux increases the pressure at the target surface and so raises the boiling temperature. Once the normal boiling is established, the presence of volumetric energy densities slightly higher than that equivalent to the saturation temperature causes the formation and growth of a vapor bubble. If the deposition rate of volumetric energy density by a laser pulse exceeds the energy consumed by vaporization, the liquid is driven to a metastable state until the spinoidal temperature is reached. At this temperature, the liquid undergoes so called ''spinoidal decomposition'' where the entire superheated liquid volume separates into saturated liquid and vapor, which are ejected into atmosphere. This process occurs normally during LIBS sampling of a liquid surface. In case of water ablation it has been estimated that less than 50 % of the deposited energy transforms into vapor while the remaining part is consumed for ejection of droplets [3]. The energy loss on droplet expulsion i.e. splashing further degrades the LIBS signal.LIBS measurements are often performed on water solutions or inside the same. Laser intera...

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Section: Sampling Of Liquid Surface Droplet and Aerosolmentioning

confidence: 99%

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confidence: 99%

LIBS Analysis of Liquids and of Materials Inside Liquids

Lazic

2014

Springer Series in Optical Sciences

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“…If attributes like minimal sample preparation and high detection sensitivity are resolved, then LIBS offers great potential for detection of elements in liquids. Consequently, various attempts were made by several researchers to overcome the problems encountered for liquid samples [13–15]. …”

Section: Laser-induced Breakdown Spectroscopy (Libs)mentioning

confidence: 99%

Use of Laser-Induced Breakdown Spectroscopy for the Detection of Glycemic Elements in Indian Medicinal Plants

Kumar

Srivastava

Sharma

et al. 2013

Evidence-Based Complementary and Alternative Medicine

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The demand for interdisciplinary research is increasing in the new millennium to help us understand complex problems and find solutions by integrating the knowledge from different disciplines. The present review is an excellent example of this and shows how unique combination of physics, chemistry, and biological techniques can be used for the evaluation of Indian medicinal herbs used for treating diabetes mellitus. Laser-induced breakdown spectroscopy (LIBS) is a sensitive optical technique that is widely used for its simplicity and versatility. This review presents the most recent application of LIBS for detection of glycemic elements in medicinal plants. The characteristics of matrices, object analysis, use of laser system, and analytical performances with respect to Indian herbs are discussed.

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“…Laser-induced breakdown spectroscopy has applied successfully for quantitative analysis of calcified tissue samples [15]. The detection of chromium has also been performed using LIBS [16]. This technique is found capable for the detection of Cu, Pb, V and Zn in polluted soil [17].…”

Section: Introductionmentioning

confidence: 99%

Quantitative Analysis of Shilajit using Laser-Induced Breakdown Spectroscopy and Inductively Coupled Plasma/Optical Emission Spectroscopy

Rehan¹,

Riaz²,

Rehan³

et al. 2017

J Nutr Food Sci

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Laser-induced Breakdown Spectroscopy (LIBS) was used for the quantitative study of Shilajit samples using first harmonic (1064 nm) of a Q-Switched Nd:YAG laser by an appropriate detection system. The samples were chosen from the northern Himalayan mountainous range at locations namely Skardu, Gilgit, Chilas, Chitral, and Muzaffarabad. The relative concentrations of detected species were measured via integrated intensity of the strongest line of an element and via Calibration-Free CF-LIBS approach. Our findings recommend the altitudinal variations in Physico-chemical properties of Shilajit. Different functional groups were identified using Fourier Transform infrared (FTIR)-Spectroscopy. The results of LIBS were compared to results of Inductively Coupled Plasma/Optical Emission Spectroscopy (ICP/OES) with fine harmony.

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Detection sensitivity of laser-induced breakdown spectroscopy for Cr II in liquid samples

Cited by 42 publications

References 30 publications

LIBS Analysis of Liquids and of Materials Inside Liquids

LIBS Analysis of Liquids and of Materials Inside Liquids

Use of Laser-Induced Breakdown Spectroscopy for the Detection of Glycemic Elements in Indian Medicinal Plants

Quantitative Analysis of Shilajit using Laser-Induced Breakdown Spectroscopy and Inductively Coupled Plasma/Optical Emission Spectroscopy

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