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Solid-Phase Microextraction and GC-ECD of Benzophenones for Detection of Benzodiazepines in Urine [PDF]

Journal of Analytical Toxicology, 1999
Benzodiazepines are common drugs that cause intoxication. Benzodiazepines and their metabolites can be converted by hydrolysis in acid to the corresponding benzophenones, which are easier to be separated from matrices because of their hydrophobic properties.
F, Guan +6 more
openaire +2 more sources

Rapid determination of methylmercury in fish tissues

Czech Journal of Food Sciences, 2006
The aim of the present study was to develop a rapid and inexpensive method for the determination of methylmercury in fish tissues based on GC/ECD instrumentation.
Petr Maršálek, Zdeňka Svobodová
doaj +1 more source

Investigation of the occurrence of pesticide residues in rural wells and surface water following application to tobacco</a> </p><span class="r_subtitle"><img src="/img/openaccess.ico" alt="open access: yes" title="open access: yes" width="16" height="16"><i>Química Nova</i>, 2007 </span><br><span class="r_content">In this work the exposure of wells and surface water to pesticides, commonly used for tobacco cropping, was assessed. Water consumption wells and surface water flows were sampled at different times.</span><br><span class="r_sub"><i>Edson C. Bortoluzzi<span id="ma_3" style="display:none">, Danilo S. Rheinheimer, Celso S. Gonçalves, João B. R. Pellegrini, Aline M. Maroneze, Márcia H. S. Kurz, Nádia M. Bacar, Renato Zanella</span> <small><a href="#" style="color:#808080;" onClick="return toggle_div(this, 'ma_3')">+7 more</a></small></i></span><br><small><a href="https://doaj.org/article/0f5779d94077400fb943846cc42abd82" target="_blank" rel="nofollow" title="doaj.org/article/0f5779d94077400fb943846cc42abd82">doaj</a> </small> <div id="more_3" style="display:none"><a href="/sci_redir.php?doi=10.1590%2FS0100-40422007000800014" target="_blank" rel="nofollow">openaccessbutton.org (pdf)</a><br><a href="javascript:navigator.clipboard.writeText('10.1590/S0100-40422007000800014'); alert('Copied the doi');">copy doi</a> <small>(10.1590/S0100-40422007000800014)</small><br></div><small><a href="#" onClick="return toggle_div(this, 'more_3')">+1 more source</a></small><br></div><div class="r"><p class="r_title"><a href="https://doi.org/10.33320/maced.pharm.bull.2025.71.01.005" target="_blank" rel="nofollow">Development and validation of a GC-ECD method for pesticide residue detection in flour</a> <b><a href="https://bulletin.mfd.org.mk/volumes/Volume%2071_1/71_1_005.pdf" target="_blank" rel="nofollow">[PDF]</a></b> </p><span class="r_subtitle"><img src="/img/openaccess.ico" alt="open access: yes" title="open access: yes" width="16" height="16"><i>Makedonsko Farmacevtski Bilten</i></span><br><span class="r_content">This study aimed to optimize and validate a rapid, reliable and accurate method for quantitative determination of pesticide residues in flour matrix.</span><br><span class="r_sub"><i>Margarita Timofejeva<span id="ma_4" style="display:none">, Anita Najdenkoska, Biljana Bauer</span> <small><a href="#" style="color:#808080;" onClick="return toggle_div(this, 'ma_4')">+2 more</a></small></i></span><br><small><a href="https://doaj.org/article/1ebdd9b2e09349bebd3f57112574f928" target="_blank" rel="nofollow" title="doaj.org/article/1ebdd9b2e09349bebd3f57112574f928">doaj</a> </small> <div id="more_4" style="display:none"><a href="/sci_redir.php?doi=10.33320%2Fmaced.pharm.bull.2025.71.01.005" target="_blank" rel="nofollow">openaccessbutton.org (pdf)</a><br><a href="javascript:navigator.clipboard.writeText('10.33320/maced.pharm.bull.2025.71.01.005'); alert('Copied the doi');">copy doi</a> <small>(10.33320/maced.pharm.bull.2025.71.01.005)</small><br></div><small><a href="#" onClick="return toggle_div(this, 'more_4')">+1 more source</a></small><br></div><div class="r"><p class="r_title"><a href="http://www.ijcce.ac.ir/article_10958_d41d8cd98f00b204e9800998ecf8427e.pdf" target="_blank" rel="nofollow">Comparative Gas Chromatography of Halides Using Different Substituted Phenylboronic Acids as Derivatizing Reagents</a> <b><a href="http://www.ijcce.ac.ir/article_10958_d41d8cd98f00b204e9800998ecf8427e.pdf" target="_blank" rel="nofollow">[PDF]</a></b> </p><span class="r_subtitle"><img src="/img/openaccess.ico" alt="open access: yes" title="open access: yes" width="16" height="16"><i>Iranian Journal of Chemistry & Chemical Engineering</i>, 1992 </span><br><span class="r_content">The GC of halides (chloride, bromide and iodide) using phenylboronic acid (PBA), 4-bromophenylboronic acid (BPBA), 3, 5 bis (trifluoromethyl) phenylboronic acid (FPBA) and 2,4- dichlorophenylboronic acid (CPBA) as derivatizing reagents are compared.</span><br><span class="r_sub"><i>Ali Sarafraz Yazdi, W.I. Stephen</i></span><br><small><a href="https://doaj.org/article/c83a57c415c24f059a32cad572c1e931" target="_blank" rel="nofollow" title="doaj.org/article/c83a57c415c24f059a32cad572c1e931">doaj</a> </small> <br></div><div class="r"><p class="r_title"><a href="https://doi.org/10.1515/revac-2022-0034" target="_blank" rel="nofollow">A review of the application of comprehensive two-dimensional gas chromatography MS-based techniques for the analysis of persistent organic pollutants and ultra-trace level of organic pollutants in environmental samples</a> </p><span class="r_subtitle"><img src="/img/openaccess.ico" alt="open access: yes" title="open access: yes" width="16" height="16"><i>Reviews in Analytical Chemistry</i>, 2022 </span><br><span class="r_content">Analysis of complex samples in environmental matrices poses extreme challenge for analytical chemists as the number of known and unknown compounds are numerous and have varying physical and chemical properties.</span><br><span class="r_sub"><i>Vaye Oliver<span id="ma_6" style="display:none">, Ngumbu Rafael Sarji, Xia Dan</span> <small><a href="#" style="color:#808080;" onClick="return toggle_div(this, 'ma_6')">+2 more</a></small></i></span><br><small><a href="https://doaj.org/article/e636a805028745c48d409d16f916cf80" target="_blank" rel="nofollow" title="doaj.org/article/e636a805028745c48d409d16f916cf80">doaj</a> </small> <div id="more_6" style="display:none"><a href="/sci_redir.php?doi=10.1515%2Frevac-2022-0034" target="_blank" rel="nofollow">openaccessbutton.org (pdf)</a><br><a href="javascript:navigator.clipboard.writeText('10.1515/revac-2022-0034'); alert('Copied the doi');">copy doi</a> <small>(10.1515/revac-2022-0034)</small><br></div><small><a href="#" onClick="return toggle_div(this, 'more_6')">+1 more source</a></small><br></div><div class="r"><p class="r_title"><a href="https://doi.org/10.18174/568478" target="_blank" rel="nofollow">Method validation study on determination of OC-pesticides and PCBs by GC-ECD and GC-MS(/MS) in animal feeding stuffs</a> </p><span class="r_subtitle"><img src="/img/openaccess.ico" alt="open access: yes" title="open access: yes" width="16" height="16">, 2022 </span><br><span class="r_content">Due to new legislation setting maximum limits for non dioxin-like polychlorinated biphenyls (ndl-PCBs), the European Commission Mandate M/523 called for modification of current EN standards for determination of PCBs and organochlorine pesticides (OCPs ...</span><br><span class="r_sub"><i>van Leeuwen, S.P.J., de Jong, J.</i></span><br><small><a href="https://core.ac.uk/works/131791186" target="_blank" rel="nofollow" title="core.ac.uk/works/131791186">core</a> </small> <div id="more_7" style="display:none"><a href="/sci_redir.php?doi=10.18174%2F568478" target="_blank" rel="nofollow">openaccessbutton.org (pdf)</a><br><a href="javascript:navigator.clipboard.writeText('10.18174/568478'); alert('Copied the doi');">copy doi</a> <small>(10.18174/568478)</small><br></div><small><a href="#" onClick="return toggle_div(this, 'more_7')">+1 more source</a></small><br></div><div class="r"><p class="r_title"><a href="https://doi.org/10.1145/985072.985129" target="_blank" rel="nofollow">Removing GC Synchronisation</a> <b><a href="http://kar.kent.ac.uk/13703/1/RemoveAndy1.pdf" target="_blank" rel="nofollow">[PDF]</a></b> </p><span class="r_subtitle"><img src="/img/openaccess.ico" alt="open access: yes" title="open access: yes" width="16" height="16">, 2002 </span><br><span class="r_content">Garbage collection (GC) is a technique for automatically reclaiming unused blocks of application memory, thereby relieving the application programmer of this often error-prone task.</span><br><span class="r_sub"><i>King, Andy C., Andy C. King</i></span><br><small><a href="https://core.ac.uk/works/262278" target="_blank" rel="nofollow" title="core.ac.uk/works/262278">core</a> </small> <div id="more_8" style="display:none"><a href="/sci_redir.php?doi=10.1145%2F985072.985129" target="_blank" rel="nofollow">openaccessbutton.org (pdf)</a><br><a href="javascript:navigator.clipboard.writeText('10.1145/985072.985129'); alert('Copied the doi');">copy doi</a> <small>(10.1145/985072.985129)</small><br></div><small><a href="#" onClick="return toggle_div(this, 'more_8')">+1 more source</a></small><br></div><div class="r"><p class="r_title"><a href="https://doi.org/https://doi.org/10.21897/rta.v20i2.756" target="_blank" rel="nofollow">Implementation of the methodology QuEChERS in the residual pesticide analysis in white corn (Zea mays)</a> </p><span class="r_subtitle"><img src="/img/openaccess.ico" alt="open access: yes" title="open access: yes" width="16" height="16"><i>Temas Agrarios</i>, 2015 </span><br><span class="r_content">The use of pesticides on maize crops during and after harvest constitutes a serious health and environmental risk if its prevalence remains during the consumption line.</span><br><span class="r_sub"><i>Martha I. Páez, Jina M. Martínez</i></span><br><small><a href="https://doaj.org/article/3a17d07c6cb44d28823fb21a4f03dec1" target="_blank" rel="nofollow" title="doaj.org/article/3a17d07c6cb44d28823fb21a4f03dec1">doaj</a> </small> <div id="more_9" style="display:none"><a href="/sci_redir.php?doi=https%3A%2F%2Fdoi.org%2F10.21897%2Frta.v20i2.756" target="_blank" rel="nofollow">openaccessbutton.org (pdf)</a><br><a href="javascript:navigator.clipboard.writeText('https://doi.org/10.21897/rta.v20i2.756'); alert('Copied the doi');">copy doi</a> <small>(https://doi.org/10.21897/rta.v20i2.756)</small><br></div><small><a href="#" onClick="return toggle_div(this, 'more_9')">+1 more source</a></small><br></div><div class="r"><p class="r_title"><a href="https://doi.org/10.1016/j.emcon.2020.08.002" target="_blank" rel="nofollow">Box Behnken design-based optimized extraction of non-dioxin-like PCBs for GC-ECD and GC-MS analyses in milk samples</a> </p><span class="r_subtitle"><img src="/img/openaccess.ico" alt="open access: yes" title="open access: yes" width="16" height="16"><i>Emerging Contaminants</i>, 2020 </span><br><span class="r_content">A multivariate optimization process of the sample extraction procedure by Box-Behnken design through a global desirability function is described for the determination of six non-dioxin-like polychlorinated biphenyls (NDL-PCBs # 28, 52, 101, 153, 138 and ...</span><br><span class="r_sub"><i>Valeria Nardelli<span id="ma_10" style="display:none">, Valeria D’Amico, Ines Della Rovere, Francesco Casamassima, Wadir Mario Valentino Marchesiello, Donatella Nardiello, Maurizio Quinto</span> <small><a href="#" style="color:#808080;" onClick="return toggle_div(this, 'ma_10')">+6 more</a></small></i></span><br><small><a href="https://doaj.org/article/5f0cc0378f6349778f493eec394c09fb" target="_blank" rel="nofollow" title="doaj.org/article/5f0cc0378f6349778f493eec394c09fb">doaj</a> </small> <div id="more_10" style="display:none"><a href="/sci_redir.php?doi=10.1016%2Fj.emcon.2020.08.002" target="_blank" rel="nofollow">openaccessbutton.org (pdf)</a><br><a href="javascript:navigator.clipboard.writeText('10.1016/j.emcon.2020.08.002'); alert('Copied the doi');">copy doi</a> <small>(10.1016/j.emcon.2020.08.002)</small><br></div><small><a href="#" onClick="return toggle_div(this, 'more_10')">+1 more source</a></small><br></div><div class="r"><div style="margin-bottom:2px;overflow:hidden"><div style="display: inline-block; float: left; font-size: small; padding-right: 16px; margin-top: -1px; padding-bottom: 1px;"><a href="/q-6._clean_water/" class="suggestion"onclick="show_loader();"><b>6. clean water</b></a><br/><a href="/q-chromatography%2C_gas/" class="suggestion"onclick="show_loader();"><b>chromatography, gas</b></a><br/><a href="/q-3._good_health/" class="suggestion"onclick="show_loader();"><b>3. good health</b></a><br/></div><div style="display: inline-block; float: left; font-size: small; padding-right: 16px; margin-top: -1px; padding-bottom: 1px;"><a href="/q-pesticides/" class="suggestion"onclick="show_loader();"><b>pesticides</b></a><br/><a href="/q-gas_chromatography/" class="suggestion"onclick="show_loader();"><b>gas chromatography</b></a><br/><a href="/q-13._climate_action/" class="suggestion"onclick="show_loader();"><b>13. climate action</b></a><br/></div><div style="display: inline-block; float: left; font-size: small; padding-right: 16px; margin-top: -1px; padding-bottom: 1px;"><a href="/q-2._zero_hunger/" class="suggestion"onclick="show_loader();"><b>2. zero hunger</b></a><br/><a href="/q-quechers/" class="suggestion"onclick="show_loader();"><b>quechers</b></a><br/><a href="/q-analytical_chemistry/" class="suggestion"onclick="show_loader();"><b>analytical chemistry</b></a><br/></div></div></div><div class="pagenav"><a href="/q-gc-ecd/p-4/" rel="nofollow"><b>previous</b></a> <a href="/q-gc-ecd/p-3/" rel="nofollow">3</a> <a href="/q-gc-ecd/p-4/" rel="nofollow">4</a> <b>5</b> <a href="/q-gc-ecd/p-6/" rel="nofollow">6</a> <a href="/q-gc-ecd/p-7/" rel="nofollow">7</a> <a href="/q-gc-ecd/p-6/" id="next" rel="nofollow"><b>next</b></a> </div><br></div> </div> <script>document.getElementById('loadingGif').style.display='none';</script><div style="width: 100%; height: 40px; bottom: 0px; background-color: #f5f5f5;"><div style="padding-left: 15px; padding-top: 10px"> <a href="/" rel="nofollow">Home</a> - <a href="/page-about/" rel="nofollow">About</a> - <a href="/page-disclaimer/" rel="nofollow">Disclaimer</a> - <a href="/page-privacy/" rel="nofollow">Privacy</a> </div></div> <link rel="stylesheet" href="//ajax.googleapis.com/ajax/libs/jqueryui/1.11.4/themes/smoothness/jquery-ui.min.css"/> <script> (function(ss,ex){ window.ldfdr=window.ldfdr||function(){(ldfdr._q=ldfdr._q||[]).push([].slice.call(arguments));}; 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