Sensitive magnetic dispersive solid-phase extraction using hydrophobic magnetic nanoparticles and GC-MS analysis for the determination of sterol composition in milk samples for the detection of palm oil

2017 ◽  
Vol 9 (14) ◽  
pp. 2211-2219 ◽  
Author(s):  
Davood Bigdelifam ◽  
Mahdi Hashemi ◽  
Parvin Zohrabi ◽  
Mahdiyeh Sadeghpour ◽  
Ehsan Radaee
Keyword(s):  
Magnetic Nanoparticles ◽  
Solid Phase Extraction ◽  
Palm Oil ◽  
Solid Phase ◽  
Sterol Composition ◽  
Phase Extraction ◽  
Dispersive Solid Phase Extraction ◽  
Milk Samples ◽  
Modified Magnetic Nanoparticles

Magnetic dispersive solid phase extraction with modified magnetic nanoparticles has been developed for the detection of palm oil in milk samples.

scholarly journals Dispersive solid-phase extraction based on butylamide silica for the determination of sulfamethoxazole in milk samples by capillary electrophoresis

2016 ◽  
Vol 39 (14) ◽  
pp. 658-665 ◽  
Author(s):  
Gabriela Islas ◽  
José A. Rodríguez ◽  
M. Elena Páez-Hernández ◽  
Silvia Corona-Avendaño ◽  
Alberto Rojas-Hernández ◽  
...  
Keyword(s):  
Capillary Electrophoresis ◽  
Solid Phase Extraction ◽  
Solid Phase ◽  
Phase Extraction ◽  
Dispersive Solid Phase Extraction ◽  
Milk Samples

scholarly journals Magnetic Solid-Phase Extraction using Ionic Liquid-Modified Magnetic Nanoparticles for The Simultaneous Extraction of Cadmium and Lead in Milk Samples; Evaluation of Measurement Uncertainty

2021 ◽  
Vol 65 (4) ◽  
Author(s):  
Sara Khodadadi ◽  
Elaheh Konoz ◽  
Ali Ezabadi ◽  
Ali Niazi
Keyword(s):  
Ionic Liquid ◽  
Magnetic Nanoparticles ◽  
Solid Phase ◽  
Magnetic Solid Phase Extraction ◽  
Phase Extraction ◽  
Simultaneous Extraction ◽  
Milk Samples ◽  
Magnetic Solid ◽  
Modified Magnetic Nanoparticles

Abstract. In the present study, a new, sensitive, and rapid method was developed for extraction and determination of the trace amounts of Pb (II) and Cd (II) ions in milk samples through magnetic solid-phase extraction using DABCO based-ionic liquid-modified magnetic nanoparticles (Fe3O4/[DABCO-PDO]Cl NPs). Herein, Pb (II) and Cd (II) contents were quantified with flame atomic absorption spectroscopy (FAAS). The effect of different empirical parameters (such as sample pH, adsorbent amount, type and amount of the elution, extraction and desorption times, and the ligand concentration) was evaluated and optimized for simultaneous extraction and pre-concentration Pb (II) and Cd (II) ions. The calibration curve was linear under the optimum condition in the concentration range of 0.4-200 µgL-1 for Cd, and 0.5-120 µgL-1 for Pb, respectively. The pre-concentration factor was 67, with the detection limit of 0.09 and 0.07 µgL-1 for Pb and Cd, respectively. The relative standard deviation values (RSD %) of the proposed method were lower than 2.6 %. The developed method was successfully used to determine lead and cadmium content in milk samples. The information obtained from the method validation has been used to estimate the expanded uncertainty for the determination of Pb (II) and Cd (II) at trace levels in commercial milks.   Resumen. En este trabajo, se ha desarrollado un nuevo, sensible y rápido procedimiento para la extracción y determinación de iones Pb(II) y Cd(II) a nivel de trazas en leche, mediante extracción en fase sólida utilizando nanopartículas magnéticas modificadas con líquido iónico basado en DABCO (Fe3O4/[DABCO-PDO]Cl NPs). La determinación de ambos metales se llevó a cabo por espectrometría de absorción atómica con atomización en llama. Se ha evaluado el efecto de diferentes parámetros empíricos (tales como pH, cantidad de adsorbente, tipo y cantidad de solvente de elución, tiempo de extracción y desorción, y concentración del ligando); estos parametros fueron optimizados enfocándose en la extracción y preconcentración simultanea de ambos iones. Empleando las condiciones establecidas, se obtuvo buena linealidad de las curvas de calibración en el intervalo de concentraciones 0.4-200 µgL-1 para Cd, y 0.5-120 µgL-1 para Pb, respectivamente. Se logró el factor de preconcentración 67, con los límites de detección 0.09 y 0.07 µgL-1 para Pb y Cd, respectivamente. Los valores de desviación estandar relativa (RSD %) en el procedimiento propuesto no sobrepasaron 2.6 %. En el análisis de leche, se obtuvieron resultados satisfactorios. Los datos obtenidos en etapa de validación se utilizaron para estimar la incertidumbre expandida en la determinación de Pb y Cd a nivel de trazas en leche.

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