An assessment of the applicability of the use of a plasticised PVC membrane containing pyrochatecol violet complexing reagent for the determination of Cu2+ ions in aqueous solutions by LIBS

Santos, Klécia M.; Cortez, Juliana; Raimundo, Ivo M.; Pasquini, Célio; Morte, Elane S. Boa; Korn, Maria Graças A.

doi:10.1016/j.microc.2013.05.013

Cited by 23 publications

(17 citation statements)

References 19 publications

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“…The use of LIBS in analyzing the adsorption ability of heavy metals on polymeric material is scarcely reported. Though Santos et al used polymeric material (polyvinyl chloride), it was applied as a membrane [7]. Thus, this can be a significant contribution to analyzing the adsorption on COPUFs, especially with the presence of matrix effects such as roughness and uneven microsurface structure.…”

Section: Adsorption Of Pb 2+ Ions On Various Copufsmentioning

confidence: 99%

“…Even LIBS is more preferable than inductively coupled plasma atomic emission spectroscopy (ICP-AES) due to its applicability for in situ measurement. However, for aqueous samples, LIBS is still limited due to the liquid splashing and the water vaporization that contribute to the unreliable analysis [7]. To overcome the problem, adsorption has been incorporated to allow concentration enrichment on a solid surface, thus increasing the measurement stability [8].…”

Section: Introductionmentioning

confidence: 99%

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Filler-Modified Castor Oil-Based Polyurethane Foam for the Removal of Aqueous Heavy Metals Detected Using Laser-Induced Breakdown Spectroscopy (LIBS) Technique

et al. 2020

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The use of polymeric material in heavy metal removal from wastewater is trending. Heavy metal removal from wastewater of the industrial process is of utmost importance in green/sustainable manufacturing. Production of absorbent materials from a natural source for industrial wastewater has been on the increase. In this research, polyurethane foam (PUF), an adsorbent used by industries to adsorb heavy metal from wastewater, was prepared from a renewable source. Castor oil-based polyurethane foam (COPUF) was produced and modified for improved adsorption performance using fillers, analyzed with laser-induced breakdown spectroscopy (LIBS). The fillers (zeolite, bentonite, and activated carbon) were added to the COPUF matrix allowing the modification on its surface morphology and charge. The materials were characterized using Fourier-transform infrared (FTIR), scanning electron microscopy (SEM), and thermal gravimetry analysis (TGA), while their adsorption performance was studied by comparing the LIBS spectra. The bentonite-modified COPUF (B/COPUF) gave the highest value of the normalized Pb I (405.7 nm) line intensity (2.3), followed by zeolite-modified COPUF (Z/COPUF) (1.9), and activated carbon-modified COPUF (AC/COPUF) (0.2), which indicates the adsorption performance of Pb2+ on the respective materials. The heavy metal ions’ adsorption on the B/COPUF dominantly resulted from the electrostatic attraction. This study demonstrated the potential use of B/COPUF in adsorption and LIBS quantitative analysis of aqueous heavy metal ions.

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Section: Adsorption Of Pb 2+ Ions On Various Copufsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Filler-Modified Castor Oil-Based Polyurethane Foam for the Removal of Aqueous Heavy Metals Detected Using Laser-Induced Breakdown Spectroscopy (LIBS) Technique

et al. 2020

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“…15,21,22,24 Research published by Chen and co-workers 28 reached LODs as low as 0.083−5.62 ng·mL −1 for Cr, Mn, Cu, Zn, Cd, and Pb by using the electrical-deposition technique. Although some lower LODs were achieved in their work, extra experimental apparatus such as electrical power supply and magnetic stirrer equipment were required.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…An LOD of 15 μg·L −1 was obtained by simply immersing the membrane in the liquid samples, but the extraction time was as long as 50 min, meaning the problem of time-consuming. 24 Shi et al developed a pretreatment method based on 3D nanochannel porous Al 2 O 3 membranes. Sensitive detection for Cu, Ag, Pb, and Cr was accomplished by simply transferring a 100 μL sample onto the membrane surface and evaporating the sample solvent; the LOD obtained for Cr was as low as 81 ng·mL −1 .…”

mentioning

confidence: 99%

Simple, Fast Matrix Conversion and Membrane Separation Method for Ultrasensitive Metal Detection in Aqueous Samples by Laser-Induced Breakdown Spectroscopy

Wang¹,

Yin²,

Lin³

et al. 2015

Anal. Chem.

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A fast, low cost, and sensitive sample pretreatment method was specially developed for laser-induced breakdown spectroscopy (LIBS) based on metal precipitation and membrane separation for simultaneous elemental analysis in liquid samples. The metal elements were reacted with the chelating reagent 2,4,6-trimercapto-1,3,5-triazine (TMT) in the first step and separated by mixed cellulose ester microfiltration membrane subsequently. A specific membrane supporter with smaller aperture than the commercially available needle filter was designed and assembled in the presented research to increase the sensitivity. As a result, the detection limits of Cu, Ag, Mn, and Cr obtained in this research were 2.59 ng·mL(-1), 0.957 ng·mL(-1), 0.958 ng·mL(-1), and 1.29 ng·mL(-1) respectively, which were greatly improved from direct liquid analysis by LIBS. Satisfactory linearity, reproducibility, and accuracy were also obtained in the concentration range of 10-120 ng·mL(-1) for all four elements tested at the optimized experimental conditions. The analytical figures of merits of the proposed method are at an advanced level and are comparable to those reported among other non-LIBS research. In addition, the separation mechanism in this research was initially explored and further varied to be based on metal precipitates adsorption by membrane fibers, rather than a regular size-dependent obstruction.

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“…The transfer of the analyte from the liquid to solid phase by solid phase extraction/microextraction techniques, (SPE/SPME) [32,33], is among the most studied pretreatment approach for liquid LIBS studies. Recently, hyphenation of LIBS detection with Talanta 149 (2016) [53][54][55][56][57][58][59][60][61] common analytical sample enrichment methodologies like liquid phase micro-extraction (LPME), dispersive liquid-liquid microextraction (DLLME) and single drop micro-extraction (SDME) [34][35][36][37] are used to improve sensitivity and detection capability of the LIBS technique in liquids analysis.…”

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 applicability of the use of a plasticised PVC membrane containing pyrochatecol violet complexing reagent for the determination of Cu2+ ions in aqueous solutions by LIBS

Cited by 23 publications

References 19 publications

Filler-Modified Castor Oil-Based Polyurethane Foam for the Removal of Aqueous Heavy Metals Detected Using Laser-Induced Breakdown Spectroscopy (LIBS) Technique

Filler-Modified Castor Oil-Based Polyurethane Foam for the Removal of Aqueous Heavy Metals Detected Using Laser-Induced Breakdown Spectroscopy (LIBS) Technique

Simple, Fast Matrix Conversion and Membrane Separation Method for Ultrasensitive Metal Detection in Aqueous Samples by Laser-Induced Breakdown Spectroscopy

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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