{"data":{"id":"10.6084/m9.figshare.1629350.v1","type":"dois","attributes":{"doi":"10.6084/m9.figshare.1629350.v1","prefix":"10.6084","suffix":"m9.figshare.1629350.v1","identifiers":[],"alternateIdentifiers":[],"creators":[{"name":"Ayala-Cabrera, Juan F.","nameType":"Personal","givenName":"Juan F.","familyName":"Ayala-Cabrera","affiliation":[],"nameIdentifiers":[]},{"name":"Trujillo-Rodríguez, María J.","nameType":"Personal","givenName":"María J.","familyName":"Trujillo-Rodríguez","affiliation":[],"nameIdentifiers":[]},{"name":"Pino, Verónica","nameType":"Personal","givenName":"Verónica","familyName":"Pino","affiliation":[],"nameIdentifiers":[]},{"name":"Hernández-Torres, Óscar M.","nameType":"Personal","givenName":"Óscar M.","familyName":"Hernández-Torres","affiliation":[],"nameIdentifiers":[]},{"name":"Afonso, Ana M.","nameType":"Personal","givenName":"Ana M.","familyName":"Afonso","affiliation":[],"nameIdentifiers":[]},{"name":"Sirieix-Plénet, Juliette","nameType":"Personal","givenName":"Juliette","familyName":"Sirieix-Plénet","affiliation":[],"nameIdentifiers":[]}],"titles":[{"title":"Ionic liquids versus ionic liquid-based surfactants in dispersive liquid–liquid microextraction for determining copper in water by flame atomic absorption spectrometry"}],"publisher":"Taylor \u0026 Francis","container":{},"publicationYear":2016,"subjects":[{"subject":"Biophysics"},{"subject":"Biochemistry"},{"subject":"Space Science"},{"subject":"29999 Physical Sciences not elsewhere classified","subjectScheme":"FOR"},{"subject":"FOS: Physical sciences","schemeUri":"http://www.oecd.org/science/inno/38235147.pdf","subjectScheme":"Fields of Science and Technology (FOS)"},{"subject":"FOS: Physical sciences","subjectScheme":"Fields of Science and Technology (FOS)"},{"subject":"Biotechnology"},{"subject":"59999 Environmental Sciences not elsewhere classified","subjectScheme":"FOR"},{"subject":"FOS: Earth and related environmental sciences","schemeUri":"http://www.oecd.org/science/inno/38235147.pdf","subjectScheme":"Fields of Science and Technology (FOS)"},{"subject":"FOS: Earth and related environmental sciences","subjectScheme":"Fields of Science and Technology (FOS)"},{"subject":"39999 Chemical Sciences not elsewhere classified","subjectScheme":"FOR"},{"subject":"FOS: Chemical sciences","schemeUri":"http://www.oecd.org/science/inno/38235147.pdf","subjectScheme":"Fields of Science and Technology (FOS)"},{"subject":"FOS: Chemical sciences","subjectScheme":"Fields of Science and Technology (FOS)"},{"subject":"Ecology"},{"subject":"FOS: Biological sciences","schemeUri":"http://www.oecd.org/science/inno/38235147.pdf","subjectScheme":"Fields of Science and Technology (FOS)"},{"subject":"FOS: Biological sciences","subjectScheme":"Fields of Science and Technology (FOS)"},{"subject":"Science Policy"}],"contributors":[],"dates":[{"date":"2016-01-05","dateType":"Created"},{"date":"2016-02-02","dateType":"Updated"},{"date":"2016","dateType":"Issued"}],"language":null,"types":{"ris":"DATA","bibtex":"misc","citeproc":"dataset","schemaOrg":"Dataset","resourceType":"Dataset","resourceTypeGeneral":"Dataset"},"relatedIdentifiers":[{"relationType":"IsSupplementTo","relatedIdentifier":"10.1080/03067319.2015.1128538","relatedIdentifierType":"DOI"},{"relationType":"IsIdenticalTo","relatedIdentifier":"10.6084/m9.figshare.1629350","relatedIdentifierType":"DOI"}],"relatedItems":[],"sizes":["115393 Bytes"],"formats":[],"version":null,"rightsList":[{"rights":"Creative Commons Attribution 4.0 International","rightsUri":"https://creativecommons.org/licenses/by/4.0/legalcode","schemeUri":"https://spdx.org/licenses/","rightsIdentifier":"cc-by-4.0","rightsIdentifierScheme":"SPDX"}],"descriptions":[{"description":"This work compares the performance of dispersive liquid–liquid method (DLLME) as a prior step for determining copper by flame atomic absorption spectrometry (FAAS), when using the ionic liquid (IL) 1-butyl-3-methylimidazolium hexafluorophosphate (C\u003csub\u003e4\u003c/sub\u003eMIm-PF\u003csub\u003e6\u003c/sub\u003e) or the IL-based surfactant 1-hexadecyl-3-butylimidazolium bromide (C\u003csub\u003e16\u003c/sub\u003eC\u003csub\u003e4\u003c/sub\u003eIm-Br) as extractant solvents. For the water-insoluble C\u003csub\u003e4\u003c/sub\u003eMIm-PF\u003csub\u003e6\u003c/sub\u003e, the most conventional DLLME mode using acetonitrile as dispersive solvent was employed. For the water-soluble C\u003csub\u003e16\u003c/sub\u003eC\u003csub\u003e4\u003c/sub\u003eIm-Br, the in situ DLLME mode with lithium bis[(trifluoromethane)sulfonyl]imide (Li-NTf\u003csub\u003e2\u003c/sub\u003e) as metathesis reagent was employed. In both approaches, some effective parameters such as volumes of extractant and dispersive solvents, concentration of complexing agent, pH of sample solution, salting-out effect and final diluting solvent to ensure compatibility with FAAS, were properly optimised. The optimum conditions for the IL-DLLME method using C\u003csub\u003e4\u003c/sub\u003eMIm-PF\u003csub\u003e6\u003c/sub\u003e were: 100 μL of neat C\u003csub\u003e4\u003c/sub\u003eMIm-PF\u003csub\u003e6\u003c/sub\u003e, 1 mL of acetonitrile, 10 mL of water, no control of pH for environmental waters, NaCl content of 23 g L\u003csup\u003e−\u003c/sup\u003e\u003csup\u003e1\u003c/sup\u003e, diethyl dithiocarbamate (DDTC) as complexing agent at 10 mg L\u003csup\u003e−1\u003c/sup\u003e and final dilution of the micro-droplet with acetonitrile up to 70 µL. The optimum conditions for the in situ IL-DLLME method using C\u003csub\u003e16\u003c/sub\u003eC\u003csub\u003e4\u003c/sub\u003eIm-Br were: 0.8 mL of acetonitrile, 10 mL of water containing C\u003csub\u003e16\u003c/sub\u003eC\u003csub\u003e4\u003c/sub\u003eIm-Br at 25.2 mmol L\u003csup\u003e−1\u003c/sup\u003e, final dilution step of the micro-droplet with 200 µL of acetonitrile and remaining conditions as those of C\u003csub\u003e4\u003c/sub\u003eMIm-PF\u003csub\u003e6\u003c/sub\u003e. The analytical performance of both methods was similar, being slightly better for the IL-DLLME method using C\u003csub\u003e4\u003c/sub\u003eMIm-PF\u003csub\u003e6\u003c/sub\u003e, with limits of detection (LOD) of 3.3 µg L\u003csup\u003e−1\u003c/sup\u003e (versus 5.1 µg L\u003csup\u003e−1\u003c/sup\u003e when using C\u003csub\u003e16\u003c/sub\u003eC\u003csub\u003e4\u003c/sub\u003eIm-Br), precision values as intraday relative standard deviation (RSD in %) lower than 8.8% (being of 10% for the C\u003csub\u003e16\u003c/sub\u003eC\u003csub\u003e4\u003c/sub\u003eIm-Br method) and an enrichment factor of 54 (being 27 when using C\u003csub\u003e16\u003c/sub\u003eC\u003csub\u003e4\u003c/sub\u003eIm-Br). The DLLME-FAAS method with C\u003csub\u003e4\u003c/sub\u003eMIm-PF\u003csub\u003e6\u003c/sub\u003e was used in the analysis of environmental waters with successful performance, with relative recoveries of 110% and 105%, and interday precision with RSD values of 21% and 7.4% for spiked levels of 60 and 160 µg L\u003csup\u003e−1\u003c/sup\u003e, respectively. The results obtained when analysing an urban wastewater sample coming from an inter-laboratory exercise was comparable to those obtained for other 93 laboratories. The method was also valid for the determination of Cu\u003csup\u003e2+\u003c/sup\u003e in presence of foreign ions commonly found in natural waters.","descriptionType":"Abstract"}],"geoLocations":[],"fundingReferences":[],"xml":"<?xml version="1.0" encoding="UTF-8"?>
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  <identifier identifierType="DOI">10.6084/M9.FIGSHARE.1629350.V1</identifier>
  <creators>
    <creator>
      <creatorName>Juan F. Ayala-Cabrera</creatorName>
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    <creator>
      <creatorName>María J. Trujillo-Rodríguez</creatorName>
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      <creatorName>Verónica Pino</creatorName>
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      <creatorName>Óscar M. Hernández-Torres</creatorName>
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      <creatorName>Ana M. Afonso</creatorName>
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      <creatorName>Juliette Sirieix-Plénet</creatorName>
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  <titles>
    <title>Ionic liquids versus ionic liquid-based surfactants in dispersive liquid–liquid microextraction for determining copper in water by flame atomic absorption spectrometry</title>
  </titles>
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    <description descriptionType="Abstract">&lt;p&gt;This work compares the performance of dispersive liquid–liquid method (DLLME) as a prior step for determining copper by flame atomic absorption spectrometry (FAAS), when using the ionic liquid (IL) 1-butyl-3-methylimidazolium hexafluorophosphate (C&lt;sub&gt;4&lt;/sub&gt;MIm-PF&lt;sub&gt;6&lt;/sub&gt;) or the IL-based surfactant 1-hexadecyl-3-butylimidazolium bromide (C&lt;sub&gt;16&lt;/sub&gt;C&lt;sub&gt;4&lt;/sub&gt;Im-Br) as extractant solvents. For the water-insoluble C&lt;sub&gt;4&lt;/sub&gt;MIm-PF&lt;sub&gt;6&lt;/sub&gt;, the most conventional DLLME mode using acetonitrile as dispersive solvent was employed. For the water-soluble C&lt;sub&gt;16&lt;/sub&gt;C&lt;sub&gt;4&lt;/sub&gt;Im-Br, the in situ DLLME mode with lithium bis[(trifluoromethane)sulfonyl]imide (Li-NTf&lt;sub&gt;2&lt;/sub&gt;) as metathesis reagent was employed. In both approaches, some effective parameters such as volumes of extractant and dispersive solvents, concentration of complexing agent, pH of sample solution, salting-out effect and final diluting solvent to ensure compatibility with FAAS, were properly optimised. The optimum conditions for the IL-DLLME method using C&lt;sub&gt;4&lt;/sub&gt;MIm-PF&lt;sub&gt;6&lt;/sub&gt; were: 100 μL of neat C&lt;sub&gt;4&lt;/sub&gt;MIm-PF&lt;sub&gt;6&lt;/sub&gt;, 1 mL of acetonitrile, 10 mL of water, no control of pH for environmental waters, NaCl content of 23 g L&lt;sup&gt;−&lt;/sup&gt;&lt;sup&gt;1&lt;/sup&gt;, diethyl dithiocarbamate (DDTC) as complexing agent at 10 mg L&lt;sup&gt;−1&lt;/sup&gt; and final dilution of the micro-droplet with acetonitrile up to 70 µL. The optimum conditions for the in situ IL-DLLME method using C&lt;sub&gt;16&lt;/sub&gt;C&lt;sub&gt;4&lt;/sub&gt;Im-Br were: 0.8 mL of acetonitrile, 10 mL of water containing C&lt;sub&gt;16&lt;/sub&gt;C&lt;sub&gt;4&lt;/sub&gt;Im-Br at 25.2 mmol L&lt;sup&gt;−1&lt;/sup&gt;, final dilution step of the micro-droplet with 200 µL of acetonitrile and remaining conditions as those of C&lt;sub&gt;4&lt;/sub&gt;MIm-PF&lt;sub&gt;6&lt;/sub&gt;. The analytical performance of both methods was similar, being slightly better for the IL-DLLME method using C&lt;sub&gt;4&lt;/sub&gt;MIm-PF&lt;sub&gt;6&lt;/sub&gt;, with limits of detection (LOD) of 3.3 µg L&lt;sup&gt;−1&lt;/sup&gt; (versus 5.1 µg L&lt;sup&gt;−1&lt;/sup&gt; when using C&lt;sub&gt;16&lt;/sub&gt;C&lt;sub&gt;4&lt;/sub&gt;Im-Br), precision values as intraday relative standard deviation (RSD in %) lower than 8.8% (being of 10% for the C&lt;sub&gt;16&lt;/sub&gt;C&lt;sub&gt;4&lt;/sub&gt;Im-Br method) and an enrichment factor of 54 (being 27 when using C&lt;sub&gt;16&lt;/sub&gt;C&lt;sub&gt;4&lt;/sub&gt;Im-Br). The DLLME-FAAS method with C&lt;sub&gt;4&lt;/sub&gt;MIm-PF&lt;sub&gt;6&lt;/sub&gt; was used in the analysis of environmental waters with successful performance, with relative recoveries of 110% and 105%, and interday precision with RSD values of 21% and 7.4% for spiked levels of 60 and 160 µg L&lt;sup&gt;−1&lt;/sup&gt;, respectively. The results obtained when analysing an urban wastewater sample coming from an inter-laboratory exercise was comparable to those obtained for other 93 laboratories. The method was also valid for the determination of Cu&lt;sup&gt;2+&lt;/sup&gt; in presence of foreign ions commonly found in natural waters.&lt;/p&gt;</description>
  </descriptions>
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    <subject>Biophysics</subject>
    <subject>Biochemistry</subject>
    <subject>Space Science</subject>
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    <subject>Ecology</subject>
    <subject>Science Policy</subject>
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  <publisher>Taylor &amp; Francis</publisher>
  <publicationYear>2016</publicationYear>
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    <date dateType="Created">2016-01-05</date>
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