Detection of imidacloprid and Bisphenol-S by Solid Phase Extraction (SPE) coupled with UV-VIS spectrometer and LC-MS

Zhang, Shaoqing; Jiang, Jia‐Qian

doi:10.33263/briac95.433438

Cited by 7 publications

(3 citation statements)

References 21 publications

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“…In foodstuffs, a sample preparation step is needed to eliminate or reduce the matrix effects. Among these methods, it is worth mentioning different approaches for the extraction of neonicotinoid insecticides: liquid-liquid extraction [ 27 ], liquid-phase microextraction [ 28 ], dispersive liquid-liquid microextraction [ 29 ], solid-phase extraction [ 30 ], and magnetic solid-phase extraction [ 31 ]. However, these methods present one or more of the following disadvantages: large organic solvent consumption, low adsorption capacity of the sorbent, high cost, or low recoveries [ 32 ].…”

Section: Methodsmentioning

confidence: 99%

Luminescent Probe Based on Terbium-Carbon Quantum Dots for the Quantification of Imidacloprid in Caneberries

Llorent-Martínez,

Jiménez-López,

Ruiz-Medina

2023

Journal of Analytical Methods in Chemistry

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We propose a modification of terbium-sensitized luminescence (TSL) by means of the introduction of nanoparticles to improve the sensitivity and selectivity of the analytical methods. TSL detection is usually based on the complexation between fluorescent organic compounds (the analytes) and terbium. The organic compound is then excited, and, after an energy transfer towards terbium, the latter emits the luminescence signal. Here, the modification consists of the introduction of nanoparticles (carbon quantum dots, CQDs) into the system. The carboxylic groups of CQDs react with terbium, providing an interesting time-resolved luminescence probe. We applied this system for the determination of the neonicotinoid imidacloprid (IMID). When IMID was introduced in the terbium-CQDs system, the luminescent signal (λexc/λem of 256/545 nm) was quenched, proportionally to IMID concentration in the range of 100–2500 ng·mL−1, obtaining a limit of detection of 30 ng·mL−1. A method detection limit of 0.9 mg·kg−1 was reached in caneberries, thus complying with the maximum residue level of 5 mg·kg−1 established by Codex Alimentarius. We performed recovery experiments in caneberries (blackberries, blueberries, raspberries, and mulberries), obtaining recovery yields close to 100% in all cases. These results show that the use of terbium ions-nanoparticles luminescence probes can be useful for screening purposes in quality control laboratories.

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Section: Methodsmentioning

confidence: 99%

Luminescent Probe Based on Terbium-Carbon Quantum Dots for the Quantification of Imidacloprid in Caneberries

Llorent-Martínez,

Jiménez-López,

Ruiz-Medina

2023

Journal of Analytical Methods in Chemistry

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“…In foodstufs, a sample preparation step is needed to eliminate or reduce the matrix efects. Among these methods, it is worth mentioning diferent approaches for the extraction of neonicotinoid insecticides: liquid-liquid extraction [27], liquid-phase microextraction [28], dispersive liquid-liquid microextraction [29], solidphase extraction [30], and magnetic solid-phase extraction [31]. However, these methods present one or more of the following disadvantages: large organic solvent consumption, low adsorption capacity of the sorbent, high cost, or low recoveries [32].…”

Section: Sample Treatmentmentioning

confidence: 99%

Luminescent Probe Based on Terbium-Carbon Quantum Dots for the Quantification of Imidacloprid in Caneberries

Ruiz-Medina¹,

Llorent‐Martínez²,

Jiménez-López³

2023

Preprint

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“…Numerous reports are available for the micro-level determination of sulfur-containing drugs and molecules in biological samples and pharmaceutical preparations [20][21][22][23]. The determination methods includes potentiometry [24], NMR-spectrometry [25], colorimetry [20], chromatography [26][27][28], flow injection analysis [29], fluorimetry [30], voltammetry [31] and spectrophotometry [32,33]. The high initial investment, timeconsuming processes, high costs of sample analysis, and heavy instrumentation are major concerns of many reported methods.…”

Section: Introductionmentioning

confidence: 99%

A Simple and Sensitive Inhibitory Kinetic Method for the Carbocisteine Determination

et al. 2021

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Abstract. A fast, reproducible, and sensitive method is proposed for the kinetic determination of carbocisteine (CCys). The method depends on the inhibitory property of carbocisteine, which reduces the Hg2+ catalyzed substitution rate of cyanide from [Ru(CN)6]4- with N-R-salt (1-Nitroso-2-naphthol-3,6-disulfonic acid disodium salt) via forming a stable complex with Hg2+. Spectrophotometric measurements were carried out by recording the absorbance at 525 nm (λmax of [Ru(CN)5 Nitroso-R-Salt]3- complex) at a fixed time of 10 and 15 min under the optimized reaction conditions with [N-R-salt] = 4.5 × 10-4 M, I = 0.05 M (KNO3), Temp = 45.0 ± 0.2 o C, pH = 7.0 ± 0.03, [Hg2+] = 8.0 × 10-5 M and [Ru(CN)64-] = 4.25 × 10-5 M. With the proposed method, CCys can be determined quantitatively down to 3.0 × 10-6 M. This methodology can be effectively used for the rapid quantitative estimation of CCys in the pharmaceutical samples with good accuracy and reproducibility. The addition of common excipients in pharmaceuticals even up to 1000 times with [CCys] does not interfere significantly in the estimation of CCys. Resumen. Se propone un método rápido, reproducibley sensible para la determinación cinética de la carbocisteina (CCys). El método depende de la propiedad inhibitoria de la carbocisteina que reduce la tasa de sustitución catalizada por Hg2+ del cianuro de [Ru(CN)6]4- con la sal N-R (sal disódica del ácido 1-Nitroso-2-naftol-3,6-disulfónico) mediante la formación de un complejo estable con Hg2+. Las mediciones espectrofotométricas se llevaron a cabo registrando la absorbancia a 525 nm (λmax del complejo [Ru(CN)5 Sal-Nitroso-R]3-) en un tiempo fijo de 10 y 15 min en las condiciones de reacción optimizadas con [sal-NR] = 4.5 × 10-4 M, I = 0.05 M (KNO3), Temp = 45.0 ± 0.2 o C, pH = 7.0 ± 0.03, [Hg2+] = 8.0 × 10-5 M y [Ru(CN)64-] = 4.25 × 10-5 M. Con el método propuesto, CCys se puede determinar cuantitativamente hasta 3,0 × 10-6 M. Esta metodología se puede utilizar eficazmente para la estimación cuantitativa rápida de CCys en las muestras farmacéuticas con buena precisión y reproducibilidad. La adición de excipientes comunes en productos farmacéuticos incluso hasta 1000 veces con [CCys] no interfiere significativamente en la estimación de CCys.

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Detection of imidacloprid and Bisphenol-S by Solid Phase Extraction (SPE) coupled with UV-VIS spectrometer and LC-MS

Cited by 7 publications

References 21 publications

Luminescent Probe Based on Terbium-Carbon Quantum Dots for the Quantification of Imidacloprid in Caneberries

Luminescent Probe Based on Terbium-Carbon Quantum Dots for the Quantification of Imidacloprid in Caneberries

Luminescent Probe Based on Terbium-Carbon Quantum Dots for the Quantification of Imidacloprid in Caneberries

A Simple and Sensitive Inhibitory Kinetic Method for the Carbocisteine Determination

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