Development of a multi‐residue method for the determination of 18 carbamates in tobacco by high‐performance liquid chromatography/positive electrospray ionisation tandem mass spectrometry

Mayer-Helm, Bernhard X.; Hofbauer, Ludwig; Müller, Jutta

doi:10.1002/rcm.2334

Cited by 34 publications

(12 citation statements)

References 29 publications

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“…Interestingly, the molecular structure of ditalimfos also includes delocalized π‐electrons, but M +• ions are not observed in its spectrum, possibly due to the higher proton affinity of ditalimfos. In addition to [M + H] + , M +• , and [2M + H] + ions, some of the pesticides also showed abundant fragmentation and substitution products in their mass spectra, some of which have been reported in earlier mass spectrometric studies of the same compounds39–48 (Table 1). With acetone as the spray solvent, the fragment ions at m/z 116, 332 and 163 were observed to be the most abundant ions in the mass spectra of aldicarb, ditalimfos and oxamyl, respectively.…”

Section: Resultsmentioning

confidence: 68%

Environmental and food analysis by desorption atmospheric pressure photoionization‐mass spectrometry

Luosujärvi

Kanerva

Saarela

et al. 2010

Rapid Comm Mass Spectrometry

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Desorption atmospheric pressure photoionization-mass spectrometry (DAPPI-MS) is a versatile surface analysis technique for a wide range of analytes, especially for neutral and non-polar analytes. Here, a set of analytes typically found in environmental or food samples was analyzed by DAPPI-MS. The set included five polyaromatic hydrocarbons (PAHs), one N-PAH, one brominated flame retardant, and nine pesticides, which were studied with three different spray solvents: acetone and toluene in positive ion mode, and anisole in negative ion mode. The analytes showed [M + H](+), M(+*), and [M-H](-) ions as well as fragmentation and substitution products. Detection limits for the studied compounds ranged from 30 pg to 1 ng (from 0.14 to 5.6 pmol). To demonstrate the feasibility of the use of DAPPI-MS two authentic samples - a circuit board and orange peel - and a spiked soil sample were analyzed. Tetrabromobisphenol A, imazalil, and PAHs were observed from the three above-mentioned samples, respectively. The method is best suited for rapid screening analysis of environmental or food samples.

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Section: Resultsmentioning

confidence: 68%

Environmental and food analysis by desorption atmospheric pressure photoionization‐mass spectrometry

Luosujärvi

Kanerva

Saarela

et al. 2010

Rapid Comm Mass Spectrometry

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“…In recent years, the widespread presence of pesticide residues in agricultural products such as tobacco has attracted considerable public attention because of their potential risks to human health, animals and environment [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. For this reason, the pesticide residues in tobacco should be monitored to protect the consumer.…”

Section: Introductionmentioning

confidence: 99%

Magnetic graphene as modified quick, easy, cheap, effective, rugged and safe adsorbent for the determination of organochlorine pesticide residues in tobacco

Luo

Jiang

et al. 2015

Journal of Chromatography A

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“…9,10 Therefore, a suitable sample pretreatment step is a required step prior to the analysis. Several techniques including solid phase extraction, 11,12 liquid-liquid extraction, [13][14][15][16] cloud point extraction, [17][18][19] and co-precipitation 20,21 have been employed to solve this issue. Most of these techniques suffer from limitations that limit their application.…”

Section: Introductionmentioning

confidence: 99%

Determination of Traces of Ni, Cu, and Zn in Wastewater and Alloy Samples by Flame-AAS after Ionic Liquid-Based Dispersive Liquid Phase Microextraction

Zare-Shahabadi

Asaadi

Abbasitabar

et al. 2016

J. Braz. Chem. Soc.

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A procedure has been developed for simultaneous separation/preconcentration of copper, nickel, and zinc based on in situ ionic liquid-based dispersive liquid-liquid microextraction method as a prior step to their determination by flame atomic absorption spectrometry. The analytes reacted with sodium diethyl dithiocarbamate at pH 7 to form hydrophobic chelates, which were separated and preconcentrated in the ionic liquid phase. The method is fast, simple, accurate, and environmentally friendly. The parameters affecting the extraction efficiency of the proposed method such as the pH of sample solution, centrifugation time, type and volume of the dispersive solvent, and the salt effect were studied. Enrichment factors of 61.8, 61.2, and 40.0 and detection limits of 0.79, 0.93, and 0.71 µg L -1 were obtained for copper, nickel, and zinc, respectively. The relative standard deviations based on six replicate measurements were between 1.0 and 2.7%. The method was successfully applied to the extraction and determination of these metals in wastewater and alloy samples.Keywords: dispersive liquid-liquid microextraction, nickel, zinc, copper, ionic liquid, sodium diethyl dithiocarbamate IntroductionIn the priority list of Agency for Toxic Substances and Disease Registry (ATSDR), Ni is at rank 57, Zn at 75, and Cu at 118.1 Nickel is essential for many biological activities such as activation of some enzymes and enhancement of insulin activity. 2 Copper plays important roles in metabolism, including antioxidant effects, energy generation and incorporation of Fe into hemoglobin.3 Zinc also has an important role in various biological systems, such as gene expression, protein-protein interaction, and neurotransmission. 4 Although nickel, copper, and zinc come into the category of essential trace elements, when they are taken at high levels, they can also produce toxic effects. 5-8Thus, determination and monitoring of these toxic metals in industrial effluent, biological samples and food stuff are of prime concern.The trace elements level in samples to be analyzed are sometimes lower than the detection limit of analytical instruments such as flame atomic absorption spectroscopy (FAAS), inductively coupled plasma optical emission spectrometry (ICP OES) and graphite furnace-atomic absorption spectrometry (GF-AAS).9,10 Therefore, a suitable sample pretreatment step is a required step prior to the analysis. Several techniques including solid phase extraction, 11,12 liquid-liquid extraction, [13][14][15][16] cloud point extraction, 17-19 and co-precipitation 20,21 have been employed to solve this issue. Most of these techniques suffer from limitations that limit their application. Some examples of these limitations include significant chemical additives, solvent losses, large secondary wastes, unsatisfactory enrichment factors, complex equipment, and high time consumption.Dispersive liquid-liquid microextraction (DLLME) overcomes some of the drawbacks of old sample preparation techniques. [22][23][24] It is simple, fast, and does n...

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Development of a multi‐residue method for the determination of 18 carbamates in tobacco by high‐performance liquid chromatography/positive electrospray ionisation tandem mass spectrometry

Cited by 34 publications

References 29 publications

Environmental and food analysis by desorption atmospheric pressure photoionization‐mass spectrometry

Environmental and food analysis by desorption atmospheric pressure photoionization‐mass spectrometry

Magnetic graphene as modified quick, easy, cheap, effective, rugged and safe adsorbent for the determination of organochlorine pesticide residues in tobacco

Determination of Traces of Ni, Cu, and Zn in Wastewater and Alloy Samples by Flame-AAS after Ionic Liquid-Based Dispersive Liquid Phase Microextraction

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