A new coupling of ionic liquid based-single drop microextraction with tungsten coil electrothermal atomic absorption spectrometry

Wen, Xiaodong; Deng, Qingwen; Wang, Jiwei; Yang, Shengchun; Zhao, Xia

doi:10.1016/j.saa.2012.12.040

Cited by 37 publications

(12 citation statements)

References 33 publications

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“…Recently, tungsten coil atomic absorption spectrometry (WCAAS) has been combined to LPME employing ILs as extracting phases for the extraction of Pb and Cu [18], and Cd [19] in water samples. The combination of LPME techniques with tungsten coil-based devices has been mostly restricted to WCAAS measurements, but this synergistic association remains unexplored for WCAES.…”

Section: Wcaesmentioning

confidence: 99%

Tungsten coil atomic emission spectrometry combined with dispersive liquid–liquid microextraction: A synergistic association for chromium determination in water samples

Vidal

Silva

Canals

et al. 2016

Talanta

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A novel and environmentally friendly analytical method is reported for total chromium determination and chromium speciation in water samples, whereby tungsten coil atomic emission spectrometry (WCAES) is combined with in situ ionic liquid formation dispersive liquid-liquid microextraction (in situ IL-DLLME).A two stage multivariate optimization approach has been developed employing a Plackett-Burman design for screening and selection of the significant factor involved in the in situ IL-DLLME procedure, which was later optimized by means were 3 and 10 µg L -1 , respectively. This is a 233-fold improvement when 2 compared with chromium determination by WCAES without using preconcentration. The repeatability of the proposed method was evaluated at two different spiking levels (10 and 50 µg L -1 ) obtaining coefficients of variation of 11.4 and 3.6% (n=3), respectively. A certified reference material (SRM-1643e NIST) was analysed in order to determine the accuracy of the method for total chromium determination and 112.3% and 2.5 µg L -1 were the recovery (trueness) and standard deviation values, respectively. Tap, bottled mineral and natural mineral waters were analysed at 60 µg L -1 spiking level of total Cr content at two Cr(VI)/Cr(III) ratios, and relative recovery values were ranged between 88 and 112% showing that the matrix has a negligible effect. To our knowledge, this is the first time that combines in situ IL-DLLME and WCAES.

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Section: Wcaesmentioning

confidence: 99%

Tungsten coil atomic emission spectrometry combined with dispersive liquid–liquid microextraction: A synergistic association for chromium determination in water samples

Vidal

Silva

Canals

et al. 2016

Talanta

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“…Because the size of the solvent drop significantly depends on the needle parameters, many syringe needle tip modifications were invented. To obtain a larger surface area of the needle tip, a rolled PTFE (Teflon) tube was added to the needle tip or a bell‐shaped device was invented, which hold the solvent inside the device during the whole procedure and the both modifications allow to create a larger drop without loss of extraction solvent.…”

Section: Sdmementioning

confidence: 99%

Critical evaluation of microextraction pretreatment techniques – Part 1: Single drop and sorbent‐based techniques

Havlíková

Čabala

Pacáková

et al. 2018

J of Separation Science

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Sample pretreatment techniques or preconcentration constitute a very important step before the analysis of environmental, clinical, pharmaceutical, and other complex samples. Thanks to extraction techniques it is possible to achieve higher method sensitivities and selectivities. Miniaturization microextraction methods make them more environmentally friendly and only small amounts of samples are required. In the past 30 years, a number of microextraction methods have been developed and used and are documented in thousands of articles. Many reviews have been written focusing on their use in specified professional fields or on the latest trends. Unfortunately, no uniform nomenclature has been introduced for these methods. Therefore, this review attempts to classify all the essential microextraction techniques and describes their advantages, disadvantages, and the latest innovations. The methods are divided into two main groups: single drop and sorbent‐based techniques according to the type of extraction phase.

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“…Furthermore, the high viscosity of some ILs, such as [P 14,6,6,6 ][Cl], can give rise to an inefficient introduction of the enriched IL into the graphite furnace [86]. Thus, in some cases, additional injection of methanol [86,88] or tetrahydrofuran [89] has been applied to introduce the analytes into the atomizer completely.…”

Section: Sdme With Atomic Detection Techniquesmentioning

confidence: 99%

“…Thus, a variety of complexing agents have been used. For example, ammonium pyrrolidine dithiocarbamate (APDC) has been employed for the formation of neutral chelates of lead [90], cobalt [87] and cadmium [89]. Furthermore, 1-(2-pyridylazo)-2-naphthol (PAN) has been employed as complexing agent of cobalt, mercury and lead [91], while 1-(2-thiazolylazo)-2-napthol (TAN) and 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol (5-Br-PADAP) have been used to obtain complexes of manganese [92] and lead [88], respectively.…”

Section: Sdme With Atomic Detection Techniquesmentioning

confidence: 99%

Opportunities and shortcomings of ionic liquids in single-drop microextraction

Marcinkowski

Pena‐Pereira

Kloskowski

et al. 2015

TrAC Trends in Analytical Chemistry

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A new coupling of ionic liquid based-single drop microextraction with tungsten coil electrothermal atomic absorption spectrometry

Cited by 37 publications

References 33 publications

Tungsten coil atomic emission spectrometry combined with dispersive liquid–liquid microextraction: A synergistic association for chromium determination in water samples

Tungsten coil atomic emission spectrometry combined with dispersive liquid–liquid microextraction: A synergistic association for chromium determination in water samples

Critical evaluation of microextraction pretreatment techniques – Part 1: Single drop and sorbent‐based techniques

Opportunities and shortcomings of ionic liquids in single-drop microextraction

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