Micellar electrokinetic chromatography after precapillary enzyme assay for the determination of phosphatase activity in semiarid soil

Determination of the herbicide metribuzin and its major conversion products in soil by micellar electrokinetic chromatography.

In this paper, a multiresidue method for the analysis in soils of metribuzin (M) and its major conversion products, deaminometribuzin (DA), diketometribuzin (DK) and deaminodiketometribuzin (DADK) is developed. Considering the neutral and charged nature of the molecules, micellar electrokinetic chromatography (MEKC) is a very efficient method for the separation of these compounds, providing hig...

Micellar electrokinetic chromatography.

Determination of thyreostatics in animal feed by micellar electrokinetic chromatography.

The determination of the thyreostatics 2-thiouracil, its derivatives (4-methyl-2-thiouracil, 4-propyl-2-thiouracil and 4-phenyl-2-thiouracil) and methimazole in manufactured dried animal feed by micellar electrokinetic chromatography (MEKC) is described. A 99 +/- 5% extraction yield at the 20 micrograms g-1 level (n = 8) was achieved by shaking the milled fodder with methanol-1 M NaOH (80 + 20)...

Analysis method of the angiotensin-I converting enzyme inhibitory activity based on micellar electrokinetic chromatography.

A micellar electrokinetic chromatography (MEKC) method was developed for estimating the angiotensin-I converting enzyme (ACE) inhibitory activity by separating the hippuric acid liberated in the ACE reaction mixture in the presence of an inhibitor, captopril. The hippuric acid was successfully separated and detected by MEKC with a 25 mM sodium dodecyl sulfate solution in a 25 mM phosphate-50 mM...

Modeling The Capacity Factor of Analytes in Micellar Electrokinetic Chromatography Using Computational Descriptors

       A multiple linear regression model is proposed to calculate capacity factor of  analytes using structural features computed using HyperChem software. The  chemical descriptors of analytes were computed using HyperChem software and  regressed against the experimental capacity factors of analytes collected from the  literature. The absolute average percentage deviation (AARD) and individua...