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Liquid-liquid microextraction without phase separation in a multicommuted flow system for diltiazem determination in pharmaceuticals
(ELSEVIER SCIENCE BV, 2011)
Liquid-liquid microextraction without phase segmentation was implemented in a multicommuted flow system for determination of the anti-hypertensive diltiazem. The procedure was based on ion pair formation between the drug ...
A procedure for determination of cobalt in water samples after dispersive liquid–liquid microextraction
(Elsevier, 2009)
In this work, a procedure for preconcentration of cobalt using dispersive liquid–liquid microextraction (DLLME) with the reagent Br-TAO as complexing reagent was developed. The procedure is based on a ternary system of ...
Ion transfer across liquid|liquid interface under forced hydrodynamic conditions. I: Digital simulations
(Elsevier Science Sa, 2012-02)
In this paper, we present the general equations for a model that describes ion transfer reactions across the oil|water interface assisted by a ligand, under forced hydrodynamic conditions. Our analysis is mainly focused ...
A simple reversed phase high-performance liquid chromatography (HPLC) method for determination of in situ gelling curcumin-loaded liquid crystals in in vitro performance tests
(2017-11-01)
A simple, rapid, and sensitive analytical procedure has been developed and validated for the in vitro measurement of curcumin in samples from mucosae retention studies. Curcumin was analyzed by HPLC using a C18 column with ...
An HPLC-UV method for the quantification of zidovudine in rat plasma
(2013-11-01)
This work aims to develop and validate a simple methodology to quantify the most used antiretroviral, zidovudine (AZT), in rat plasma for preclinical studies. Some assays have been previously reported to quantify AZT in ...
Stochastic supply curves and liquidity costs: estimation for brazilian equities
(2018-06-26)
Market Liquidity is characterized by the easiness and freedom to trade assets at desired volumes and for prices perceived as representative of their values. When there is a scarcity of bid and ask offers at those terms, ...
Salting-out assisted liquid–liquid extraction with dansyl chloride for the determination of biogenic amines in food
(2020-01-01)
Biogenic amines (BAs) are compounds present in foodstuff of animal origin that not only can be harmful to the consumer but can also serve as indicators of the product's edibility status. However, BAs’ analysis is rather ...
Development of preconcentration strategies for the simultaneous ultratrace determination of As, Cd and Pb in foods by ICP-OES: knotted-reactor vs. dispersive liquid–liquid microextraction
(Royal Society of Chemistry, 2020-03)
Determination of As, Cd and Pb in food samples by means of inductively coupled plasma optical emission spectrometry (ICP-OES) is challenging due to detection limits being close to the maximum levels established by current ...