Rapid and Sensitive Analytical Method for Simultaneous Determination of Imidacloprid and Thiamethoxam Residues in Soils of Sugarcane Ecosystem by Reversed-Phase HPLC

Ramasubramanian, T.; Paramasivam, M.; Jayanthi, R.

doi:10.1007/s11270-012-1338-7

Cited by 25 publications

(13 citation statements)

References 11 publications

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“…The MEs were evaluated by calculating the slope ratios of matrix-matched and solvent calibration curves (Zhang, Li, Yu, & Pan, 2012). The LODs were estimated for a signal-to-noise ratio of 3; the LOQs were defined as the lowest spiked levels (Ramasubramanian, Paramasivam, & Jayanthi, 2012). Accuracy and precision were expressed by intra-and inter-day recoveries and RSDs, respectively (Zhang et al, 2012).…”

Section: Methods Validationmentioning

confidence: 99%

A liquid chromatography–tandem mass spectrometry method to simultaneously determinate dichlorvos and phoxim in tobacco

Qin

Luo

Chen

et al. 2019

Biomedical Chromatography

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A simple pretreatment method with liquid chromatography–tandem mass spectrometry (LC–MS/MS) was developed and validated to simultaneously determine dichlorvos and phoxim in tobacco and soil matrices. Satisfactory linearity (R2 ≥ 0.9991) of the method was obtained for both analytes. The limits of detection and limits of quantification for dichlorvos and phoxim in three matrices were 0.0015–0.006 and 0.005–0.02 mg/kg, respectively. Average recoveries were 78.24–92.21% for dichlorvos and 76.62–100.51% for phoxim in soil, green tobacco leaves and cured tobacco leaves. The intra‐ and inter‐day relative standard deviations were <6%. The established method was successfully applied for the residual analysis of dichlorvos and phoxim in real soil and tobacco samples. The results indicated that the established method could be used to detect trace amounts of dichlorvos and phoxim in tobacco. The data could also help the Chinese government establish maximum residue limits of dichlorvos and phoxim on tobacco and establish proper and safe use of dichlorvos and phoxim on tobacco plants in China.

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Section: Methods Validationmentioning

confidence: 99%

A liquid chromatography–tandem mass spectrometry method to simultaneously determinate dichlorvos and phoxim in tobacco

Qin

Luo

Chen

et al. 2019

Biomedical Chromatography

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“…Calibration curves for all three matrices were drawn by plotting the peak area vs six concentrations [0.01–0.08 mg/kg (green tobacco leaf and soil) and 0.05–4 mg/kg (cured tobacco leaf) for thiamethoxam, 0.04–5 mg/kg (green tobacco leaf and soil) and 0.2–20 mg/kg (cured tobacco leaf) for clothianidin]. The limit of detection was determined at a signal‐to‐noise ratio of 3, and the limit of quantification was defined as the lowest spiked level (Ramasubramanian, Paramasivam, & Jayanthi, ). The matrix effect (ME) was calculated as follows: ME (%) = (peak area of standard in matrix – peak area of standard in solvent)/peak area of standard in solvent × 100.…”

Section: Methodsmentioning

confidence: 99%

“…The limit of detection was determined at a signal-to-noise ratio of 3, and the limit of quantification was defined as the lowest spiked level (Ramasubramanian, Paramasivam, & Jayanthi, 2012). The matrix effect (ME) was calculated as follows: ME (%) = (peak area of standard in matrix peak area of standard in solvent)/peak area of standard in solvent × 100.…”

Section: Methods Validationmentioning

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

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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.

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“…Moreover, the results were most satisfactory not only regarding extraction efficiency (Supporting Information Table S1), but also in terms of simplicity (three stages: extraction, centrifugation and concentration), rapidness (< 30 min) and solvent consumption (16 mL). Consequently, our proposed sample treatment has shown itself to be a good alternative to the existing procedures for analyzing these pesticides in soil, as they required a longer period of time [6,8,12,13,[16][17][18], more steps/instrumentation [3,[6][7][8][9][10][13][14][15][16][18][19][20][21], and a larger volume/amount of reagents [3,[6][7][8]11,12,[14][15][16][17][18]20] (Supporting Information Table S1).…”

Section: Optimization Of the Extraction Proceduresmentioning

confidence: 99%

“…HPLC with C 18 -based analytical columns is the technique of choice in the existing literature [6,7,9,10,[14][15][16][17]20,21], although GC has also been employed to determine MET [14,18] and CLO [8]. However, the use of GC was discarded since the analysis times were usually much longer than those of HPLC (Supporting Information Table S1) and because neonicotinoid insecticides such as TMX and CLO are unsuitable for direct analysis by GC due to their low volatility and high polarity [22].…”

Section: Introductionmentioning

confidence: 99%

Simultaneous determination of thiamethoxam, clothianidin, and metazachlor residues in soil by ultrahigh performance liquid chromatography coupled to quadrupole time-of-flight mass spectrometry

et al. 2017

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A rapid pioneering method has been developed to simultaneously determine residues of three pesticides (thiamethoxam, clothianidin, and metazachlor) in soil by ultrahigh performance liquid chromatography coupled to a mass spectrometry detector (quadrupole time-of-flight). An efficient extraction procedure (90-105% average analyte recoveries) has also been proposed, involving solid-liquid extraction by a mixture of water and methanol (60:40, v/v), centrifugation, and concentration. A chromatographic analysis of the compounds was achieved in 5.5 min by means of a core-shell technology based column (Kinetex EVO C , 50 × 2.1 mm, 1.7 μm, 100 Å). The mobile phase (0.3 mL/min, gradient elution mode) consisted of 0.1% v/v formic acid in water and 0.1% v/v formic acid in acetonitrile. The method was fully validated in terms of selectivity, detection and quantification limits, matrix effect, linearity, trueness, and precision. Low limits of detection and quantification were obtained, ranging from 0.2 to 3.0 μg/kg, which are similar to those published in previous studies, while the absence of a significant matrix effect allowed quantification of the pesticides with standard calibration curves. The proposed method was applied for an analysis of pesticides in several soil samples from experimental fields dedicated to oilseed rape cultivars.

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Rapid and Sensitive Analytical Method for Simultaneous Determination of Imidacloprid and Thiamethoxam Residues in Soils of Sugarcane Ecosystem by Reversed-Phase HPLC

Cited by 25 publications

References 11 publications

A liquid chromatography–tandem mass spectrometry method to simultaneously determinate dichlorvos and phoxim in tobacco

A liquid chromatography–tandem mass spectrometry method to simultaneously determinate dichlorvos and phoxim in tobacco

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

Simultaneous determination of thiamethoxam, clothianidin, and metazachlor residues in soil by ultrahigh performance liquid chromatography coupled to quadrupole time-of-flight mass spectrometry

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