Compliance analysis of phenylurea and related compounds in drinking water by liquid chromatography/electrospray ionization/mass spectrometry coupled with solid-phase extraction

Li, Yongtao; George, John E.; McCarty, Christina L.; Wendelken, Steven C.

doi:10.1016/j.chroma.2006.08.081

Cited by 30 publications

(23 citation statements)

References 29 publications

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“…In order to determine trace analytes by UV detection method, a sample preparation technique prior to analysis is needed, the most used sample preparation techniques include SPE [3,5,8,[12][13][14], SPME [6,11], LLE [10], LPME [15,16], and DLLME [17]. However, these techniques possess some defects.…”

Section: Introductionmentioning

confidence: 99%

“…However, derivatization is still necessary for thermally unstable PUHs to be determined by GC. Liquid chromatography (LC) provides the advantage of direct analysis of PUHs, and several detectors have been coupled to LC for the determination of PUHs, including fluorescence [5][6][7], MS [8,9], and UV [10][11][12][13][14]. Among those methods, UV detection offers many advantages, such as low cost, and the absence of labeling process.…”

Section: Introductionmentioning

confidence: 99%

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Determination of Phenylureas Herbicides in Foodstuffs Based on Matrix Solid-Phase Dispersion Extraction and RP-LC with UV Detection

et al. 2011

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A new method for simultaneous determination of seven kinds of phenylurea herbicides (PUHs) in solid foodstuffs was established based on matrix solid phase dispersion (MSPD)-RP-LC. The procedure of MSPD is simple and not time-consuming. C 18 -bonded silica and anhydrous alumina were, respectively, used as dispersion sorbent and purificant, and dichloromethane as extraction reagent. Under the optimum conditions, seven kinds of herbicides were separated completely within 30 min, response was a linear function of concentration over the range 2.5-500 lg L -1 with good correlation coefficients ([0.99) and lower detection limits (0.25 and 0.5 lg L -1 ). Intra-day and inter-day precision of the peak areas for seven PUHs were less than 3.7 and 5.3%. The new method was used to detect seven PUHs in four kinds of solid foodstuffs with average recoveries range from 73.1 to 101%.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Determination of Phenylureas Herbicides in Foodstuffs Based on Matrix Solid-Phase Dispersion Extraction and RP-LC with UV Detection

et al. 2011

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“…Extraction could be also performed with membrane disks containing C 18 -bonded silica (8 μm particles) on polytetrafluoroethylene or glass fiber supports (Spivakov et. al., 2006;Li et al, 2006). Disc provides shorter sample processing time on account of their larger cross-sectional area and decreased pressure drop, allowing higher sample flow rates.…”

Section: Classic Sorbentsmentioning

confidence: 99%

Solid-Phase Extraction for Enrichment and Separation of Herbicides

Pyrzyńska¹

2011

Herbicides, Theory and Applications

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“…High-performance liquid chromatography (HPLC) is preferred with various detection systems including ultraviolet (UV) [20][21][22][23], diode array detection (DAD) [23][24][25][26], MS [27,28] and tandem mass spectrometry (MS n ) [29], and fluorescence detection (FLD) [30]. Generally, LC-MS techniques are considered superior to all the above-mentioned detection techniques, in terms of specificity and sensitivity.…”

Section: Introductionmentioning

confidence: 99%

Determination of Deltamethrin in Mice Plasma and Immune Organs by Simple Reversed-Phase HPLC

Kumar¹,

Dubey²,

Kant³

et al. 2016

Acta Chromatographica

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Deltamethrin, a well-known type 2 synthetic pyrethroid insecticide, is a widespread environmental toxicant. It has potential to accumulate in body fluids and tissues due to its lipophilic characteristics. The immune system is among the most sensitive targets regarding toxicity of environmental pollutants. Various methods are available in the literature to analyze deltamethrin (DLM) concentration in plasma and tissues, but regarding the immune organs, only one gas chromatography–tandem mass spectrometry (GC–MS/MS) method (on spleen tissues) has been reported. In the present investigation, a rapid and sensitive high-performance liquid chromatography (HPLC) method has been developed and validated to determine DLM concentration in plasma, thymus, and spleen using zaleplone as an internal standard. Liquid chromatography (LC) separation is performed on an Agilent Zorbax® C8 column (250 mm × 4.6 mm, i.d., 5 μm) with isocratic elution using a mobile phase consisting of acetonitrile–5 mM KH2PO4 (70:30, v/v) at a flow rate of 1 mL min−1. The lower limit of quantification (LLOQ) for DLM is 10 ng mL−1 (plasma, thymus, and spleen). The method has been validated in terms of establishing linearity, specificity, sensitivity, recovery, accuracy, and precision (intra- and inter-day) and stabilities study. This validated method was successfully applied to a pharmacokinetic and tissue distribution study of DLM in mice.

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Compliance analysis of phenylurea and related compounds in drinking water by liquid chromatography/electrospray ionization/mass spectrometry coupled with solid-phase extraction

Cited by 30 publications

References 29 publications

Determination of Phenylureas Herbicides in Foodstuffs Based on Matrix Solid-Phase Dispersion Extraction and RP-LC with UV Detection

Determination of Phenylureas Herbicides in Foodstuffs Based on Matrix Solid-Phase Dispersion Extraction and RP-LC with UV Detection

Solid-Phase Extraction for Enrichment and Separation of Herbicides

Determination of Deltamethrin in Mice Plasma and Immune Organs by Simple Reversed-Phase HPLC

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