Optimized combination of dilution and refined QuEChERS to overcome matrix effects of six types of tea for determination eight neonicotinoid insecticides by ultra performance liquid chromatography–electrospray tandem mass spectrometry

Jiao, Weiting; Xiao, Yu; Qian, Xiao-San; Tong, Mengmeng; Hu, Yizheng; Hou, Ruyan; Hua, Rimao

doi:10.1016/j.foodchem.2016.04.097

Cited by 105 publications

(44 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The selection of a reasonable extraction solvent was of crucial importance for the pretreatment process (Zheng et al, ). According to previous reports (Giroud et al, ; Jiao et al, ; Vichapong et al, ), ethyl acetate, methanol, acetonitrile and acetonitrile containing 0.1% formic acid have been assessed for sample extraction to remove as many potential interfering substances as possible from fresh tobacco leaf, soil and cured tobacco leaf samples. The data, presented in Figure , show that, when acetonitrile containing 0.1% formic acid was used as the extraction solvent, better recoveries of thiamethoxam and clothianidin from fresh tobacco leaf, soil and cured tobacco leaf were obtained (90–98%) compared with the other three solvents.…”

Section: Resultssupporting

confidence: 93%

“…According to previous reports (Giroud et al, 2013;Jiao et al, 2016;Vichapong et al, 2016), ethyl acetate, methanol, acetonitrile and acetonitrile containing 0.1% formic acid have been assessed for sample extraction to remove as many potential interfering substances as possible from fresh tobacco leaf, soil and cured tobacco leaf samples.…”

Section: Optimization Of the Sample Preparation Proceduresmentioning

confidence: 99%

See 1 more Smart Citation

Simultaneous determination of residues of thiamethoxam and its metabolite clothianidin in tobacco leaf and soil using liquid chromatography‐tandem mass spectrometry

Meng

Zhang

et al. 2018

Biomedical Chromatography

View full text Add to dashboard Cite

A simple analytical method was developed to simultaneously determine thiamethoxam and its metabolite, clothianidin, in fresh tobacco leaf, soil and cured tobacco leaf using liquid chromatography with tandem mass spectrometry. Thiamethoxam and clothianidin in tobacco and soil samples were extracted with acetonitrile containing 0.1% formic acid and purified using an NH -SPE column. The optimized method provided good linearity with coefficients of determination R ≥ 0.9981. The limits of detection and quantification were between 0.006-0.12 and 0.02-0.4 mg/kg, respectively. Intra- and inter-day recovery assays were used to validate the established method. The average recoveries of thiamethoxam and clothianidin in fresh tobacco leaf, soil and cured tobacco leaf were 75.04-100.47%, 75.86-86.40% and 89.83-99.39%, respectively. The intra- and inter-day relative standard deviations were all <9%. The developed method was successfully applied for the analysis of thiamethoxam and clothianidin residues in actual tobacco and soil samples. The results indicated that the established method met the requirements for the analysis of trace amounts of thiamethoxam and clothianidin in fresh tobacco leaf, soil and cured tobacco leaf.

show abstract

Section: Resultssupporting

confidence: 93%

Section: Optimization Of the Sample Preparation Proceduresmentioning

confidence: 99%

Simultaneous determination of residues of thiamethoxam and its metabolite clothianidin in tobacco leaf and soil using liquid chromatography‐tandem mass spectrometry

Meng

Zhang

et al. 2018

Biomedical Chromatography

View full text Add to dashboard Cite

show abstract

“…Liquid chromatography has been the chosen technique for neonicotinoids quantitation. In particular, most commonly for tea, has been high performance liquid chromatography (HPLC) coupled to mass spectrometry, although the combination of HPLC with spectrophotometric detection and immunoassay has also been reported. Particular attention must be paid to the extraction procedure, due to the complexity of the sample matrix and potential matrix effects.…”

Section: Introductionmentioning

confidence: 99%

Determination of thiacloprid, thiamethoxam and imidacloprid in tea samples by quenching terbium luminescence

2019

View full text Add to dashboard Cite

Consumption of herbal teas, infusions and other plant-related products has always been popular due to the related health benefits. However, the safety of these products needs to be assessed, for example monitoring the potential presence of contaminants such as pesticides. In this paper, we report an analytical method for determining three neonicotinoid insecticides − thiacloprid, thiamethoxam, and imidacloprid − that are widely used worldwide. This method is based on quenching by analytes of the luminescence signal of terbium ions. Terbium presents a timeresolved luminescence signal at 256/545 nm/nm, which is quenched by the presence of low concentrations of the selected analytes. Detection limits of 0.1, 0.2 or 0.75 μg ml −1 were obtained for thiamethoxam, thiacloprid and imidacloprid, respectively. Recovery experiments in different teas (green tea, black tea, chamomile, peppermint) were performed at concentrations lower than the maximum residue limits established by the European Union and the Codex Alimentarius for tea samples.In all cases, satisfactory recovery yields were observed, and the results were compared with a chromatographic reference method. The proposed method therefore proved suitable for quantifying these insecticides, fulfilling the current legislation.

show abstract

“…In analysis of pesticide residues, major progress in recent years was the introduction of GC-MS/MS and LC-MS/MS. They can significantly increase the analyzing speed and identify more than one hundred of pesticides compared to previous GC or LC methods, and have been widely used to analyze multiple pesticide residues in various matrices, such as water [8,9], animal tissues [10][11][12], plants and plant oils [13][14][15][16], and teas [17,18]. When operated in multiple reaction monitoring (MRM) mode, improved sensitivity and excellent selectivity can be achieved.…”

Section: Introductionmentioning

confidence: 99%

Determination of multiple pesticide residues in teas by gas chromatography with accurate time‐of‐flight mass spectrometry

Teng

Wang³

et al. 2019

J of Separation Science

View full text Add to dashboard Cite

In this work, gas chromatography tandem with electron ionization and full-scan high-resolution mass spectrometry with a time-of-flight mass analyzer was evaluated for analyzing pesticide residues in teas. The relevant aspects for mass spectrometry analysis, including the resolution and mass accuracy, acquisition rate, temperature of ion source, were investigated. Under acquisition condition in 2-GHz extended dynamic range mode, accurate mass spectral library including 184 gas chromatography detectable pesticides was established and retrieval parameters were optimized.The mass spectra were consistent over a wide concentration range (three orders) with good match values to those of NIST (EI-quadrupole). The methodology was verified by the validation of 184 pesticides in four tea matrices. A wide linear range (1-1000 μg/kg) was obtained for most compounds in four matrices. Limit of detection, limit of quantification, and limit of identification values acquired in this study could satisfy the requirements for maximum residue levels prescribed by the European Community. Recovery studies were performed at three concentrations (10, 50, and 100 μg/kg). Most of the analytes were recovered at an acceptable range of 70-120% with relative standard deviations ≤ 20% in four matrices. The potential extension of qualitative screening scope makes gas chromatography tandem with electron ionization and mass spectrometry with a time-of-flight mass analyzer a more powerful tool compared with gas chromatography with tandem mass spectrometry. K E Y W O R D Saccurate mass spectral library, gas chromatography, pesticides, teas, time-of-flight mass analyzer 1990

show abstract

Optimized combination of dilution and refined QuEChERS to overcome matrix effects of six types of tea for determination eight neonicotinoid insecticides by ultra performance liquid chromatography–electrospray tandem mass spectrometry

Cited by 105 publications

References 35 publications

Simultaneous determination of residues of thiamethoxam and its metabolite clothianidin in tobacco leaf and soil using liquid chromatography‐tandem mass spectrometry

Simultaneous determination of residues of thiamethoxam and its metabolite clothianidin in tobacco leaf and soil using liquid chromatography‐tandem mass spectrometry

Determination of thiacloprid, thiamethoxam and imidacloprid in tea samples by quenching terbium luminescence

Determination of multiple pesticide residues in teas by gas chromatography with accurate time‐of‐flight mass spectrometry

Contact Info

Product

Resources

About