Speciation of chromium by dispersive liquid–liquid microextraction followed by laser-induced breakdown spectrometry detection (DLLME–LIBS)

Gaubeur, Ivanise; Aguirre, Miguel; Kovachev, Nikolay; Hidalgo, Montserrat; Canals, Antonio

doi:10.1039/c5ja00325c

Cited by 39 publications

(17 citation statements)

References 26 publications

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“…The method was validated by spike recoveries from these samples. Gaubeur et al detected 124 the Cr by surface-enhanced LIBS (described in earlier publications from this research group) from an Al substrate to which 10 µL of the organic solvent had been applied and then dried. There are no details of this stage of the procedure, though the rest of the LIBS system is described in considerable detail.…”

Section: Chromiummentioning

confidence: 99%

Atomic Spectrometry Update: review of advances in elemental speciation

Clough

Harrington

Hill

et al. 2018

J. Anal. At. Spectrom.

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This is the ninth Atomic Spectrometry Update (ASU) to focus on advances in elemental speciation and covers a period of approximately 12 months from December 2015. This ASU review deals with all aspects of the analytical atomic spectrometry speciation methods developed for: the determination of oxidation states; organometallic compounds; coordination compounds; metal and heteroatom-containing biomolecules, including metalloproteins, proteins, peptides and amino acids; and the use of metal-tagging to facilitate detection via atomic spectrometry. The review does not cover fractionation, which is sometimes termed operationally defined speciation. As with all ASU reviews the focus of the research reviewed includes those methods that incorporate atomic spectrometry as the measurement technique. However, because speciation analysis is inherently focused on the relationship between the metal(loid) atom and the organic moiety it is bound to, or incorporated within, atomic spectrometry alone cannot be the sole analytical approach of interest. For this reason molecular detection techniques are also included where they have provided a complementary approach to speciation analysis. As in previous years, As and Se speciation continues to dominate the current literature, with reports of the speciation of Cr and Hg also increasing, and there are an ever rising number of publications concerning the analysis of 'biomolecules'. Whilst most of this work is still the preserve of the research field some methods are now approaching the robustness and rapidity for use in the clinical setting.

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Section: Chromiummentioning

confidence: 99%

Atomic Spectrometry Update: review of advances in elemental speciation

Clough

Harrington

Hill

et al. 2018

J. Anal. At. Spectrom.

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show abstract

“…A significant contribution has been made to the improvement of dispersive liquid‐liquid preconcentration procedures for speciation of chromium ions . Out of these methodologies, mostly characterized for reducing the time, consumption of potentially organic solvents, tedious multi stage operations, generation of waste in the laboratory, requirement of complex and large laboratory equipment that usually faced in preconcentration methods.…”

Section: Introductionmentioning

confidence: 99%

Ultrasonic assisted deep eutectic solvent liquid–liquid microextraction using azadipyrromethene dye as complexing agent for assessment of chromium species in environmental samples by electrothermal atomic absorption spectrometry

Panhwar

Tüzen

Deligonul

et al. 2018

Applied Organom Chemis

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A novel type of solvent named deep eutectic solvent (DES) has been considered as a green ionic liquid analogue. A novel method was developed for enrichment and speciation of chromium ion from water and food samples based on deep eutectic solvent and ultrasonic extraction. The procedure for this method was comprised of Cr(III) complex formation with a hydrophobic complexing agent (Z)-N-(3,5-diphenyl-1H-pyrrol-2-yl)-3,5-diphenyl-2H-pyrrol-2-imine (azadipyrromethene dye). Metal complex was entrapped in a deep eutectic solvent as an extracting solvent. While Cr(III) recovery was quantitative, the recovery of Cr(VI) was found 5%. After reduction of Cr(VI) to Cr(III), the method was applied for determination of total chromium(III) ion. The amount of Cr(VI) was calculated as subtracting of Cr(III) from total chromium ion. Various analytical parameters were optimized. The certified reference materials were analyzed and standard addition method also carried out to real samples to check the accuracy of the developed method. Preconcentration factor was found to be 50. The limit of detection of chromium(III) was found to be 4.3 ng l -1 . The precision of developed method as the relative standard deviation (RSD) was found as 3.5 %. The developed method was applied successfully for the speciation of chromium ions in water and food samples.

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“…6 The most commonly performed analytical strategy for Cr monitoring involves two steps: (1) collection of water samples at the eld site followed by storage and transportation it to the laboratory, and (2) analysis using atomic spectrometry aer separation by one of a number of online or offline separation approaches, such as solid-phase extraction, liquid-liquid extraction, cloud-point extraction, or co-precipitation. [8][9][10][11][12][13][14] However, accurate speciation of Cr in natural water bodies is difficult, mainly due to matrix complexity and the instability of Cr redox species during sample collection, transport, and analysis. 15 For example, Meeravali et al 16 found that the concentration of Cr(III) increased by 135% and that of Cr(VI) decreased by 75% within 24 h when lake water samples were collected and stored at 4 C. This demonstrates that the concentrations of chemical species in particular redox states are inherently unstable in water and subject to change by re-equilibration upon reaction with other dissolved components.…”

Section: Introductionmentioning

confidence: 99%

On-site separation of Cr(vi) and Cr(iii) in natural waters by parallel cartridge ion-exchange columns

Zhang

Guo

et al. 2017

RSC Adv.

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Speciation of chromium by dispersive liquid–liquid microextraction followed by laser-induced breakdown spectrometry detection (DLLME–LIBS)

Abstract: Combination of dispersive liquid–liquid microextraction with laser-induced breakdown spectrometry for simultaneous pre-concentration, speciation and detection of Cr.

Cited by 39 publications

References 26 publications

Atomic Spectrometry Update: review of advances in elemental speciation

Atomic Spectrometry Update: review of advances in elemental speciation

Ultrasonic assisted deep eutectic solvent liquid–liquid microextraction using azadipyrromethene dye as complexing agent for assessment of chromium species in environmental samples by electrothermal atomic absorption spectrometry

On-site separation of Cr(vi) and Cr(iii) in natural waters by parallel cartridge ion-exchange columns

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