Hyphenation in sample preparation: Advancement from the micro to the nano world

Ali, Imran; Gupta, Vinod K.; Aboul‐Enein, Hassan Y.; Hussain, Afzal

doi:10.1002/jssc.200800123

Cited by 118 publications

(29 citation statements)

References 180 publications

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“…And, of course, these approaches may be utilized for chiral analyses too. It is intresting to note that among few sorts of sample preparation SPE has achieved a good reputation in analytical science due to its ease of operation, selective, time and costly chemical saving nature [8]. Some reviews have been published on the pre-treatment and sample preparation methodologies for the achiral analysis of pollutants [9][10][11][12][13].…”

Section: Sample Treatmentmentioning

confidence: 99%

Chiral Analyses of Pollutants by Capillary Electrophoresis

Ali¹

2010

TOCBMJ

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Abstract:The determination of enantiomeric composition of chiral xenobiotics and pollutants is a very difficult job due to their low amounts and poor detection by commonly used UV detector. But this sort of analysis is an important issue from the health point of view. The chiral analyses of these notorious pollutants by capillary electrophoresis have been discussed in this article. This review discusses the new trends and advancements, which have been achieved in the analyses of chiral pollutants using capillary electrophoresis and the state-of-art of their enaniomeric resolution. This article focuses on sample treatment, applications, optimization, detection, mechanisms of chiral resolution and future perspectives of CE in chiral resolution of xenobiotics. Besides, efforts have also been made to suggest the improvement in CE machine to make it ideal for the analyses of chiral xenobiotics at trace levels.

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Section: Sample Treatmentmentioning

confidence: 99%

Chiral Analyses of Pollutants by Capillary Electrophoresis

Ali¹

2010

TOCBMJ

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“…Moreover, these methods potentially expose the analyst and the environment to hazardous and toxic organic solvents. Reviews about hyphenation and high-throughput bioanalysis have been recently published [13,14]. In this article, we present a new analytical method based on online SPE-LC-ESI-MS/MS for determination of VLX in human plasma using fluoxetine (FXT, Fig.…”

Section: Introductionmentioning

confidence: 99%

Automated determination of venlafaxine in human plasma by on‐line SPE‐LC‐MS/MS. Application to a bioequivalence study

Suenaga

Ifa²,

Cruz

et al. 2009

J of Separation Science

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A new automated SPE-LC-ESI-MS/MS method was developed and validated to quantify venlafaxine in human plasma using fluoxetine as an internal standard. The analytes were automatically extracted from plasma by C18 SPE cartridges, separated on a C8 RP column and analyzed by MS in the multiple reaction-monitoring (MRM) mode. The method has a chromatographic run time of 4.0 min and a linear calibration curve over the range of 0.25-200 ng/mL (r >0.997). The between-run precisions, based on the percent RSD for replicate quality controls (0.75; 80, and 200 ng/mL), were < 8.5% for all concentrations. The between-run accuracies, based on the percent relative error, were < 4.0%. This method was successfully employed in a bioequivalence study of two venlafaxine capsule formulations (test formulation from Eurofarma (Brazil) and Efexor XR, reference formulation, from Wyeth-Whitehall, Brazil) in 48 healthy volunteers of both sexes who received a single 150 mg dose of each formulation. More than 3000 samples were analyzed eliminating the analyst's exposure to hazardous organic solvents normally employed in off-line liquid-liquid extractions. The 90% confidence interval (CI) of the individual ratio geometric mean for Test/Reference was 91.6-103.4% for AUC(0-48 h) and 102.2-112.6% for C(max). Since both 90% CI for AUC(0-48 h) and C(max) were included in the 80-125% interval proposed by the US Food and Drug Administration (FDA) and the Brazilian National Health Surveillance Agency (ANVISA), the test formulation was considered bioequivalent to Efexor XR according to both the rate and extent of absorption.

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“…There are several methods for sample preparation, such as microwave-assisted extraction (Pedersen and Lindholst, 1999), liquid-liquid extraction (LLE) (Helaleh et al, 2001), solid-phase microextraction (SPME) (Sanagi et al, 2015;Ali et al, 2008), liquid phase microextraction (LPME) (Basheer and Lee, 2004), molecularly imprinted solid-phase extraction (Canale et al, 2010;Ali, 2009), dispersive liquid-liquid microextraction (DLLME) (Rezaee et al, 2009) and solid-phase extraction (SPE). Among these methods, LLE is an exhaustive traditional preparation technique used to extract and preconcentrate different analytes from environmental water samples.…”

Section: Introductionmentioning

confidence: 99%

Pre‐concentration of trace amount of bisphenol A in water samples by palm leaf ash and determination with high‐performance liquid chromatography

Sohrabi

Bahramifar

Javadian

et al. 2016

Biomedical Chromatography

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Palm leaf ash was characterized and used as low-cost adsorbent for solid-phase extraction and preconcentration of bisphenol A (BPA) in real water samples. Analysis of BPA was carried out using HPLC involving Eurospher 100-5-C18 (25 cm × 4.5 mm, particle size 5 μm) column and water-acetonitrile (40:60, v/v) as mobile phase. The adsorption was achieved quantitatively at a pH of 6 with elution by 3 mL acetonitrile. The limits of detection and enrichment factor were 0.02 μg L(-1) and 333, respectively. Under optimum conditions the relative standard deviation (RSD) was 2% (n = 10). Comparison of qualification criteria of presented preconcentration procedure with other research indicated that palm leaf ash adsorbent was better than many of the adsorbents in terms of cost and reusability. Also, the limit of detection, precision and enrichment factor were comparable and even better than the previously reported methods. Finally, the efficiency of method was computed by determination of trace amounts of BPA in sea, river, mineral and tap waters with recoveries of 93.3-105.5% and RSDs of 0.61-3.12%.. Briefly, the developed solid-phase extraction and Preparative layer chromatography (PLC) methods may be used for bisphenol A monitoring in any environmental water sample. Copyright © 2016 John Wiley & Sons, Ltd.

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Hyphenation in sample preparation: Advancement from the micro to the nano world

Cited by 118 publications

References 180 publications

Chiral Analyses of Pollutants by Capillary Electrophoresis

Chiral Analyses of Pollutants by Capillary Electrophoresis

Automated determination of venlafaxine in human plasma by on‐line SPE‐LC‐MS/MS. Application to a bioequivalence study

Pre‐concentration of trace amount of bisphenol A in water samples by palm leaf ash and determination with high‐performance liquid chromatography

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