Development of a pH-dependent homogeneous liquid-liquid extraction by cold-induced phase separation in acetonitrile/water mixtures for determination of quinolone residues in animal-derived foods was written by Hu, Shuping;Zhao, Min;Wang, Zhongle;Yang, Jiaying;Chen, Dawei;Yan, Pengcheng. And the article was included in Journal of Chromatography A in 2021.Product Details of 113617-63-3 This article mentions the following:
A simple extraction procedure coupled with liquid chromatog.-Q Orbitrap high resolution mass spectrometry (LC-Q Orbitrap HRMS) for the determination of 19 quinolones in animal-derived foods (pork, fish, egg and milk) has been developed. Sample preparation is based on homogeneous liquid-liquid extraction at pH > 9 using water-miscible acetonitrile with cold-induced phase separation The procedure allowed one-step enrichment and cleanup of all the 19 quinolones with different logP properties to lower aqueous phase, which eliminated the process of preconcentration and re-dissolution for sample solution Furthermore, an adsorption phenomenon was observed between conventional borosilicate glass injection vials and most of quinolones. In detection anal., a scheduled variable full scan strategy was performed to improve detection performance in Q Orbitrap HRMS. Under optimal conditions, a superior limit of quantitation (0.028-0.192渭g/kg) in animal-derived foods was achieved using this proposed method. Lastly, this method was validated and applied successfully in real samples. In the experiment, the researchers used many compounds, for example, 1-Cyclopropyl-7-(cis-3,5-dimethylpiperazin-1-yl)-5,6,8-trifluoro-4-oxo-1,4-dihydroquinoline-3-carboxylic acid (cas: 113617-63-3Product Details of 113617-63-3).
1-Cyclopropyl-7-(cis-3,5-dimethylpiperazin-1-yl)-5,6,8-trifluoro-4-oxo-1,4-dihydroquinoline-3-carboxylic acid (cas: 113617-63-3) belongs to piperazine derivatives. A form in which piperazine is commonly available industrially is as the hexahydrate, C4H10N2. 6H2O, which melts at 44 掳C and boils at 125鈥?30 掳C. Although many piperazine derivatives occur naturally, piperazine itself can be synthesized by reacting alcoholic ammonia with 1,2-dichloroethane, by the action of sodium and ethylene glycol on ethylene diamine hydrochloride, or by reduction of pyrazine with sodium in ethanol.Product Details of 113617-63-3
Referemce:
Piperazine – Wikipedia,
Piperazines – an overview | ScienceDirect Topics