Authors Nazraz, M; Yamini, Y; Ramezani, AM; Dinmohammadpour, Z in ELSEVIER published article about SINGLE-DROP MICROEXTRACTION; PHASE MICROEXTRACTION; GAS-CHROMATOGRAPHY; IONIC LIQUID; WATER SAMPLES; CHLOROBENZENES; GC; TRANSITION in [Nazraz, Mahsa; Yamini, Yadollah; Dinmohammadpour, Zeinab] Tarbiat Modares Univ, Dept Chem, Tehran, Iran; [Ramezani, Amir M.] Neyshabur Univ Med Sci, Hlth Ageing Res Ctr, Neyshabur, Iran in 2021.0, Cited 29.0. Name: Mequinol. The Name is Mequinol. Through research, I have a further understanding and discovery of 150-76-5
A miscible-immiscible deep eutectic solvent (DES) containing monoethanolamine/4-methoxyphenol was used as an extraction solvent in a homogeneous liquid-liquid microextraction (HLLME). The method was used to preconcentrate chlorobenzenes in water samples followed by separating and analyzing them by gas chromatography-mass spectroscopy (GC-MS). A special feature of the new extraction method is that a green miscible solvent was used as an extractant in the HLLME method. The developed extraction technique provided enrichment factors in the range of 13.1-42.1 for extraction from only 1.0 mL of the aqueous sample solution. The effects of various experimental parameters were investigated and optimized. The optimal conditions were as follows: vortex time: 30.0 s, bubbling CO2 gas: 1.0 min, salt concentration: 5.0% w/v, rate and time of centrifuge: 4000.0 rpm and 3.0 min, respectively, and DES volume: 30.0 mu L. The limit of detections and the limit of quantifications for the four targeted analytes varied from 0.01-0.15 and 0.025-0.5 mu g L-1, respectively. The precision and long-term precision tests for the developed method were found to be less than 11.0%. Two real samples, including toilet air freshener and car perfume, were analyzed. The applied DES in the HLLME method provides a fast means of sample preparation for environmental aqueous sample solutions. (C) 2020 Elsevier B.V. All rights reserved.
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,Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles