scholarly journals Fast Quantitation of Target Analytes in Small Volumes of Complex Samples by Matrix-Compatible Solid-Phase Microextraction Devices

2016 ◽  
Vol 55 (26) ◽  
pp. 7510-7514 ◽  
Author(s):  
Hamed Piri-Moghadam ◽  
Fardin Ahmadi ◽  
German Augusto Gómez-Ríos ◽  
Ezel Boyacı ◽  
Nathaly Reyes-Garcés ◽  
...  
Keyword(s):  
Solid Phase Microextraction ◽  
Solid Phase ◽  
Complex Samples ◽  
Target Analytes

scholarly journals Fast Quantitation of Target Analytes in Small Volumes of Complex Samples by Matrix-Compatible Solid-Phase Microextraction Devices

2016 ◽  
Vol 128 (26) ◽  
pp. 7636-7640 ◽  
Author(s):  
Hamed Piri-Moghadam ◽  
Fardin Ahmadi ◽  
German Augusto Gómez-Ríos ◽  
Ezel Boyacı ◽  
Nathaly Reyes-Garcés ◽  
...  
Keyword(s):  
Solid Phase Microextraction ◽  
Solid Phase ◽  
Complex Samples ◽  
Target Analytes

scholarly journals Exploring New Extractive Phases for In-Tube Solid Phase Microextraction Coupled to Miniaturized Liquid Chromatography

Separations ◽  
2019 ◽  
Vol 6 (1) ◽  
pp. 12 ◽  
Author(s):  
Pascual Serra-Mora ◽  
Paola García-Narbona ◽  
Jorge Verdú-Andrés ◽  
Rosa Herráez-Hernández ◽  
Pilar Campíns-Falcó
Keyword(s):  
Liquid Chromatography ◽  
Solid Phase Microextraction ◽  
Solid Phase ◽  
Artificial Sweetener ◽  
Aromatic Rings ◽  
Chemical Structures ◽  
Target Analytes ◽  
Polycyclic Aromatic ◽  
On Line ◽  
Valve In Valve

In-tube solid-phase microextraction (IT-SPME) coupled on-line to miniaturized liquid chromatography (LC) has emerged as a powerful tool to address a variety of analytical problems. However, in order to expand its applicability, the development of new sorbents that enhance the efficiency and specificity of the extraction is highly desirable. In this respect, the employment of capillary columns coated with sorbents functionalized with nanoparticles (NPs) replacing the loop of the injection valve (in-valve IT-SPME) is one of the most attractive options. In this work, polymers of tetraethyl orthosilicate (TEOS) and trimethoxyethylsilane (MTEOS) modified with SiO2 and TiO2 NPs have been synthetized and used for the extraction of a variety of water pollutants, using both Capillary-LC and Nano-LC. Compounds with different chemical structures and polarities such as the artificial sweetener saccharine, the polycyclic aromatic hydrocarbons (PAHs) naphthalene and fluoranthene, and some phenylurea and organophosphorous herbicides have been used as target analytes. The extraction efficiencies found with the synthetized capillaries have been compared to those obtained with commercially available capillaries coated with polydiphenyl-polydimethylsiloxane (PDMS), nitroterephthalic acid modified polyetilenglicol (FFAP), and polystyrene-divinylbenzene (PS-DVB) phases. The results obtained in this preliminary study showed that, although PS-DVB phase has the strongest affinity for compounds with two or more aromatic rings, the extraction with TEOS-MTEOS coatings modified with NPs is the best option for a majority of the tested compounds. Examples of application are given.

Using silica coated magnetite nanoparticles modified with anionic surfactant aggregates as a solid phase microextraction adsorbent for determination of fluoroquinolones in egg samples by spectrofluorimetry

2015 ◽  
Vol 7 (18) ◽  
pp. 7831-7839 ◽  
Author(s):  
Ezzat Naddaf ◽  
Mahmoud Ebrahimi ◽  
Zarrin Es'haghi ◽  
Hossien Akhlaghi
Keyword(s):  
Anionic Surfactant ◽  
Magnetite Nanoparticles ◽  
Solid Phase Microextraction ◽  
Solid Phase ◽  
Ion Pair ◽  
Surfactant Aggregates ◽  
Target Analytes

A simple and rapid IP-SPME method was developed for extraction and determination of fluoroquinolones. The target analytes were converted into ion pair complexes with SDBS.

scholarly journals Quantification of trace transformation products of rocket fuel unsymmetrical dimethylhydrazine in sand using vacuum-assisted headspace solid-phase microextraction

2021 ◽  
Author(s):  
Aray Zhakupbekova ◽  
Nassiba Baimatova ◽  
Elefteria Psillakis ◽  
Bulat Kenessov
Keyword(s):  
Solid Phase Microextraction ◽  
Solid Phase ◽  
Transformation Products ◽  
Gas Chromatography Mass Spectrometry ◽  
Linear Calibration ◽  
Evacuation Time ◽  
Headspace Solid Phase Microextraction ◽  
Unsymmetrical Dimethylhydrazine ◽  
Target Analytes ◽  
Trace Concentrations

Abstract Quantification of unsymmetrical dimethylhydrazine (UDMH) transformation products (TPs) in solid samples is an important stage in monitoring of environmental pollution caused by heavy rockets launches. The new method for simultaneous quantification of UDMH TPs in sand samples using vacuum-assisted headspace solid-phase microextraction (Vac-HSSPME) followed by gas chromatography-mass spectrometry (GC-MS) is proposed. Compared to regular HSSPME, Vac-HSSPME yielded 1.3–4.8 times higher responses for NDMA, MTA and PAl. Increasing air-evacuation time from 20 to 120 s at 23 ºC resulted in decreased responses of analytes by 25–46%. Freezing of samples (-30 ºC) had negligible effect on responses of analytes at air-evacuation time 20 s. The best combination of responses of analytes and their RSDs was achieved after air-evacuation of a sample (m = 1.00 g) for 20 s at 23 ºC, incubation for 30 min and 30-min extraction at 40°C by Car/PDMS fiber. Vac-HSSPME provided linear calibration plots in studied ranges of concentrations with coefficients of determination ranging from 0.9912 to 0.9938. The limits of detection for spiked sand samples varied from 0.035 to 3.6 ng g− 1. Spike recoveries of target analytes from sand samples were 84–97% with RSDs 1–11%. The developed method was successfully tested in the experiment on studying losses of analytes from open vials with model sand spiked with UDMH TPs. The developed method can be recommended for analysis of trace concentrations of UDMH TPs when studying their transformation, migration and distribution in contaminated sand.

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