NDLI: Effect of sodium dodecyl sulphate and Brij-35 on the analysis of sulphonamides in physiological samples using direct injection and acetonitrile gradients

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Effect of sodium dodecyl sulphate and Brij-35 on the analysis of sulphonamides in physiological samples using direct injection and acetonitrile gradients

Content Provider	Royal Society of Chemistry (RSC)
Author	Ruiz-Angel, M. J. Ubeda-Torres, M. T. García-Alvarez-Coque, M. C. Peris-García, E.
Copyright Year	2016
Abstract	Micellar liquid chromatography (MLC) is a reversed-phase (RP) mode, which often does not require gradient elution, since the peaks of mixtures of compounds within a large range of polarities appear more evenly distributed in the chromatograms of isocratic elution, giving rise to a “gradient effect”. However, the use of a gradient of organic solvent may still be convenient to shorten the total analysis time. This work compares the separation of 15 sulphonamides using conventional hydro-organic RPLC and MLC with the surfactants sodium dodecyl sulphate (SDS) and Brij-35, and both isocratic and gradient elution with acetonitrile. The observed behaviour is rationalized attending to the interactions in the different environments formed inside the chromatographic column, in the absence and presence of the two surfactants. The retention of alkylbenzenes is used to evaluate the relative polarity of the stationary phase under hydro-organic and micellar conditions. The most favourable gradients in MLC were used to analyse the sulphonamides in milk and urine samples, directly injected into the chromatograph. The addition of an initial step of a micellar mobile phase containing only SDS or Brij-35 facilitated the direct injection of the sample, which was followed by a gradient of acetonitrile to elute the most retained compounds.
Starting Page	3941
Ending Page	3952
Page Count	12
File Format	HTM / HTML PDF
ISSN	17599660
Volume Number	8
Issue Number	19
Journal	Analytical Methods
DOI	10.1039/c6ay00390g
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Urine SDS Sulfonamide Sodium Lauric acid Acetonitrile Micelle Micellar liquid chromatography Fuel injection Reversed-phase chromatography Solvent Chromatography
Content Type	Text
Resource Type	Article
Subject	Analytical Chemistry Engineering Chemical Engineering

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