Application of a novel sol–gel polydimethylsiloxane–poly(vinyl alcohol) solid-phase microextraction fiber for gas chromatographic determination of pesticide residues in herbal infusions

Zuin, Vânia Gomes; Lopes, Alexandre Gomes; Yariwake, Janete Harumi; Augusto, Fábio

doi:10.1016/s0021-9673(04)01278-6

Cited by 40 publications

(10 citation statements)

References 13 publications

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“…In the HS‐SPME procedure with the PDMS/PVA fiber,8 5 ml of aqueous sample saturated with NaCl (2.5 ml of Passiflora edulis. infusion plus 2.5 ml of Milli‐Q water) was enclosed in the vials and magnetically stirred (1200 rpm) for 5 min for sample/headspace equilibration.…”

Section: Methodsmentioning

confidence: 99%

“…The SPME (PDMS/PVA) determination of OCP and OPP pesticides in Passiflora L. infusions was previously studied and optimized by us using a GC‐ECD system 8. All FIMS measurements described here were carried out using an Extrel (Pittsburgh, USA) mass spectrometer fitted with a high‐transmission 3/4‐in.…”

Section: Methodsmentioning

confidence: 99%

“…These materials could be prepared by sol–gel routes, offering many advantages compared to commercially available alternatives, such as the strong adhesion of the prepared coatings to the fused silica substrate due to chemical bonding, different ranges of selectivity, highly porous structure, large surface area and remarkable thermal stability 5, 6. We recently developed a novel sol–gel PDMS/poly(vinyl alcohol) (PDMS/PVA) coated fiber and showed it to be highly efficient to extract nonpolar and semipolar compounds from aqueous samples 7, 8…”

Section: Introductionmentioning

confidence: 99%

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Fiber introduction mass spectrometry: determination of pesticides in herbal infusions using a novel sol–gel PDMS/PVA fiber for solid‐phase microextraction

et al. 2007

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An application of the direct coupling of solid-phase microextraction (SPME) with mass spectrometry (MS), a technique known as fiber introduction mass spectrometry (FIMS), is described to determine organochlorine (OCP) and organophosphorus (OPP) pesticides in herbal infusions of Passiflora L. A new fiber coated with a composite of poly(dimethylsiloxane) and poly(vinyl alcohol) (PDMS/PVA) was used. Sensitive, selective, simple and simultaneous quantification of several OCP and OPP was achieved by monitoring diagnostic fragment ions of m/z 266 (chlorothalonil), m/z 195 (alpha-endosulfan), m/z 278 (fenthion), m/z 263 (methyl parathion) and m/z 173 (malathion). Simple headspace SPME extraction (25 min) and fast FIMS detection (less than 40 s) of OCP and OPP from a highly complex herbal matrix provided good linearity with correlation coefficients of 0.991-0.999 for concentrations ranging from 10 to 140 ng ml(-1) of each compound. Good accuracy (80 to 110%), precision (0.6-14.9%) and low limits of detection (0.3-3.9 ng ml(-1)) were also obtained. Even after 400 desorption cycles inside the ionization source of the mass spectrometer, no visible degradation of the novel PDMS/PVA fiber was detected, confirming its suitability for FIMS. Fast (ca 20 s) pesticide desorption occurs for the PDMS/PVA fiber owing to the small thickness of the film and its reduced water sorption.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Fiber introduction mass spectrometry: determination of pesticides in herbal infusions using a novel sol–gel PDMS/PVA fiber for solid‐phase microextraction

et al. 2007

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“…Therefore, it is necessary to develop a method for the rapid and sensitive determination of multiple pesticide residues in TCMs to ensure safety. Nowadays, some extraction techniques, including liquid–liquid extraction (LLE) 3, 4, solid phase microextraction (SPME) 1, 5, 6 and supercritical fluid extraction 7, have been employed for extraction and purification of pesticides in TCMs for the analytical purposes. However, these methods usually need long extraction time (SPME, supercritical fluid extraction), large amount of solvent consumption (LLE) and are rather complicated (LLE, SPME).…”

Section: Introductionmentioning

confidence: 99%

Rapid simultaneous determination of multiple pesticide residues in traditional Chinese medicines using programmed temperature vaporizer injection–fast gas chromatography coupled with mass spectrometry

Song

Wang

2011

J of Separation Science

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A fast gas chromatography coupled with mass spectrometry (GC-MS) using large volume injection with programmed temperature vaporizer in solvent vent mode (PTV-LVI-SV) was developed for the trace determination of multiple pesticide residues in traditional Chinese medicines (TCMs). Experimental conditions of PTV-LVI-SV injection were optimized by central composite design. The optimized result was that initial temperature was held at 40°C for 39 s, vent flow rate was set at 45 mL/min and vent pressure was held at 0 psi for 36 s, injection volume was 10 μL. Furthermore, the quick and effective QuEChERS (quick, easy, cheap, effective, rugged and safe) method was performed to extract and purify pesticide residues in TCMs. The prepared samples were analyzed with GC-MS in the selected ion monitoring mode (SIM). The lowest LOD was 4 μg/kg for some pesticides. The recoveries were checked by spiking samples with pesticides at 25, 50 and 250 μg/kg. The average recoveries of most pesticides were from 80 to 118%. The result indicated that QuEChERS and PTV-LVI-SV GC-MS method was a rapid and sensitive analysis technique for the determination of multiple pesticide residues in TCMs.

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“…Sol‐gel technology provides surface coating and also an efficient incorporation of organic components into inorganic polymeric structures in solution under extraordinarily mild thermal conditions. Sol‐gel coatings have been used for the preparation of SPME fibers with high thermal stability and solvent stability 11–13 in the development of methodology for volatile and semi‐volatile organic compounds analysis 14–18. Recently, zirconia, alumina and titania based hybrid organic–inorganic sol‐gel coatings have been developed for SPME 19–21.…”

Section: Introductionmentioning

confidence: 99%

A sol‐gel based solid phase microextraction fiber for the analysis of aliphatic alcohols in apple juices

Farhadi

Maleki

Tahmasebi

2010

J of Separation Science

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A new fiber based on titania-chitin sol-gel coated on a silver wire for the headspace solid phase microextraction of aliphatic alcohols from apple juice samples was developed. The influences of fiber coating composition and microextraction conditions (extraction temperature, extraction time, and ionic strength of the sample matrix) on the fiber performance were investigated. Also, the influence of temperature and time on desorption of analytes from fiber were studied. Under the optimized conditions, a porous fiber with a high extraction capacity and good thermal stability (up to 250 degrees C) was obtained. The proposed headspace solid-phase microextraction-GC method was successfully used for the analysis of aliphatic alcohols in apple juice and concentrate samples. The recovery values were from 92.8 to 98.6%. The RSD (n=5) for all analytes were below 7.8%.

show abstract

Application of a novel sol–gel polydimethylsiloxane–poly(vinyl alcohol) solid-phase microextraction fiber for gas chromatographic determination of pesticide residues in herbal infusions

Cited by 40 publications

References 13 publications

Fiber introduction mass spectrometry: determination of pesticides in herbal infusions using a novel sol–gel PDMS/PVA fiber for solid‐phase microextraction

Fiber introduction mass spectrometry: determination of pesticides in herbal infusions using a novel sol–gel PDMS/PVA fiber for solid‐phase microextraction

Rapid simultaneous determination of multiple pesticide residues in traditional Chinese medicines using programmed temperature vaporizer injection–fast gas chromatography coupled with mass spectrometry

A sol‐gel based solid phase microextraction fiber for the analysis of aliphatic alcohols in apple juices

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