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PubMed Journals Articles About "Rapid Destructive Method Simultaneous Determination Aflatoxigenic Fungus Aflatoxin" RSS

04:23 EDT 19th May 2019 | BioPortfolio

Rapid Destructive Method Simultaneous Determination Aflatoxigenic Fungus Aflatoxin PubMed articles on BioPortfolio. Our PubMed references draw on over 21 million records from the medical literature. Here you can see the latest Rapid Destructive Method Simultaneous Determination Aflatoxigenic Fungus Aflatoxin articles that have been published worldwide.

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Showing "rapid destructive method simultaneous determination aflatoxigenic fungus aflatoxin" PubMed Articles 1–25 of 20,000+

A rapid and non-destructive method for simultaneous determination of aflatoxigenic fungus and aflatoxin contamination on corn kernels.

Conventional methods for detecting aflatoxigenic fungus and aflatoxin contamination are generally time-consuming, sample-destructive and require skilled personnel to perform, making them impossible for large-scale non-destructive screening detection, real-time and on-site analysis. Therefore, the potential of visible-near infrared (Vis-NIR) spectroscopy over the 400-2500 nm spectral range was examined for determination of aflatoxigenic fungus infection and the corresponding aflatoxin contamination on corn k...


Simultaneous determination of mercury and selenium in fish by CVG AFS.

In this work, an analytical method was proposed for the simultaneous determination of mercury and selenium in fish samples using Atomic Fluorescence Spectrometry (AFS). Multivariate designs were performed to evaluate the variables and optimize the best condition of chemical vapor generation (CVG) and simultaneous determination of mercury and selenium by AFS. Fish samples were prepared via acid digestion in digester block with cold finger reflux system, which ensured that the elements were not lost by volati...

Preparation, characterization and anti-aflatoxigenic activity of chitosan packaging films incorporated with turmeric essential oil.

Here, we studied the preparation, characterization, anti-aflatoxigenic activity, and molecular mechanism in vitro of chitosan packaging films containing turmeric essential oil (TEO). First, we took the mechanical properties as the evaluation Index, screened for the optimum preparation conditions of packaging films with 1.5 μL/cm TEO using single factor and orthogonal experiments, and characterized the film properties. We found that the addition of TEO affected the microcosmic structure of films and advan...


A lateral flow assay for simultaneous detection of Deoxynivalenol, Fumonisin B and Aflatoxin B.

Deoxynivalenol (DON), Fumonisin B (FB) and Aflatoxin B (AFB) have strong toxicity to humans and exist widely in grain and food. It is necessary to screen these mycotoxins to guarantee food safety. In order to develop a rapid, simple, low-cost and simultaneous-detection method, composites of antibody-nano-Au-particles, DON-BSA, FB-BSA, and AFB-BSA were prepared to establish a lateral flow assay based on competitive inhibition. The results suggested that the visual detection limits for DON, FB and AFB were 10...

A FRET-based dual-color evanescent wave optical fiber aptasensor for simultaneous fluorometric determination of aflatoxin M1 and ochratoxin A.

A dual-color fluorescence resonance energy transfer (FRET) based aptasensor is described for simultaneous determination of the mycotoxins aflatoxin M1 (AFM1) and ochratoxin A (OTA). Aptamers against AFM1 and OTA were labeled with two fluorophores with different excitation wavelengths (Cy5.5; 675 nm; and Alexa 405; 401 nm), respectively. They were used as the signalling probes. A compact dual-color evanescent wave all-fiber detection system with two lasers (635 nm; red; and 405 nm; purple) was used for t...

Simultaneous determination of curcumin, tetrahydrocurcumin, quercetin, and paeoniflorin by UHPLC-MS/MS in rat plasma and its application to a pharmacokinetic study.

Curcumin (CUR) is a bioactive compound present in many composite prescriptions of traditional Chinese medicine together with quercetin (QR) and paeoniflorin (PF). Little is known about the influence of QR and PF on the absorption and metabolism of CUR when the three compounds are orally co-administered. In this study, a rapid, sensitive, and reliable ultra-high-performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS) method was developed and validated for the simultaneous determination of CU...

Rapid detection of aflatoxin B by dummy template molecularly imprinted polymer capped CdTe quantum dots.

A novel and sensitive fluorescent sensor was synthesized for the rapid and specific recognition of aflatoxin B (AFB1) by our combining molecular imprinting techniques with quantum dot technology. Molecularly imprinted polymers coated CdTe quantum dots (MIP@CdTe QDs) were prepared through the Stöber method with 5,7-dimethoxycoumarin as a dummy template. 3-Aminopropyltriethoxysilane was selected as the functional monomer, and tetraethyl orthosilicate was used as the cross-linking agent. The best molar ratio ...

Safety evaluation of Semen Sojae Preparatum based on simultaneous LC-ESI-MS/MS quantification of Aflatoxin B , B , G , G and M.

Semen Sojae Preparatum (SSP) is one of the most widely used traditional Chinese medicines, and is also a kind of functional food. However, contamination of aflatoxins may be present in the fermentation process of SSP. To evaluate its safety, an accurate and rapid LC-ESI-MS/MS analytical method was developed and validated for the simultaneous determination of AFB , AFB , AFG , AFG and AFM in SSP. After a simple ultrasonic extraction of SSP samples, chromatographic separation was achieved on an Agilent Zorbax...

Development of an economic ultra-fast liquid chromatography with tandem mass spectrometry method for trace analysis of multi-class mycotoxins in Polygonum multiflorum.

Rapid, economic and highly-effective determination of multiple mycotoxins in complex matrices has given huge challenges for the analytical method. In this study, an economic analytical strategy based on sensitive and rapid ultra-fast liquid chromatography coupled to hybrid triple quadrupole/linear ion trap mass spectrometry technique was developed for the determination of seven mycotoxins of different chemical classes (aflatoxin B , B , G and G , ochratoxin A, T-2 toxin and HT-2 toxin) in Polygonum multiflo...

Development of an LC-MS/MS method for simultaneous determination of ticagrelor and its active metabolite during concomitant treatment with atorvastatin.

A combination of antiplatelet drugs with high-intensity statin therapy is a standard in patients with coronary events. Concomitant treatment with ticagrelor, a moderate CYP3A4 inhibitor, and CYP3A4-metabolized statins such as atorvastatin, might lead to an increased risk of muscle-related adverse events. Therefore, investigation of concentrations of these compounds in clinical samples is necessary. For this purpose, an LC-MS/MS method was developed for simultaneous determination of ticagrelor and its active...

HPLC quantitation of aflatoxin B from fungal mycelium culture.

Aflatoxins are mycotoxins that contaminate agricultural products when infected by toxigenic Aspergillus flavus. Methods for quantifying aflatoxin from culture using chromatography are available but are not optimized for population studies. We provide details of a method for preparation and quantitation of aflatoxin B from fungal cultures that satisfy those needs.

Rapid bioanalytical LC-MS/MS method for the simultaneous determination of sofosbuvir and velpatasvir in human plasma-application to a pharmacokinetic study in Egyptian volunteers.

A novel, rapid and validated LC-MS/MS bioanalytical method has been developed for the extraction and determination of sofosbuvir and velpatasvir simultaneously in human plasma using ledipasvir as an internal standard (IS). The simple and reproducible protein precipitation technique with acetonitrile was successfully used for the deproteinization and extraction of the analytes from human plasma matrix. The developed method achieved consistent recoveries over different concentrations with average extraction r...

Baclofen Impurities: Facile Synthesis and Novel Environmentally Benign Chromatographic Method for their Simultaneous Determination in Baclofen.

An efficient, economic and high yielding method is described for the synthesis of baclofen (BAC) pharmacopoeial impurities (impurities A and B) which can be used for gram scale synthesis. Furthermore, a novel ecofriendly TLC-densitometric method was established and validated for the determination of BAC and its synthesized impurities. The developed TLC-densitometric method is based on the chromatographic separation using thin layer chromatographic (TLC) plates (60 F ) using a green mobile phase of ethyl ace...

Rapid determination of phytosterols by NIRS and chemometric methods.

Phytosterols have been extensively studied because it plays essential roles in the physiology of plants and can be used as nutritional supplement to promote human health. We use a rapid method by coupling near-infrared spectroscopy (NIRS) and chemometric techniques to quickly and efficiently determine three essential phytosterols (β-sitosterol, campesterol and stigmasterol) in vegetable oils. Continuous wavelet transform (CWT) method was adopted to remove the baseline shift in the spectra. The quantitative...

Simultaneous determination of multi-class phytohormones in sub-milligram plant samples by one-pot multi-functional derivatization assisted liquid chromatography-tandem mass spectrometry.

Phytohormones play crucial roles in every aspect of plant life, and their regulatory functions rely on complex crosstalk networks among the different classes of phytohormones in an antagonistic or synergistic manner. Therefore, the simultaneous determination of multi-class phytohormones is important for studies of phytohormone functions and networks. However, due to the heterogeneity of the sensitivity resulting from structural diversity and the low content in the plant samples, simultaneous determination o...

A rapid and sensitive HPLC-MS/MS method for determination of endogenous creatine biosynthesis precursors in plasma of children with viral myocarditis.

A simple, rapid and sensitive HPLC-MS/MS method for simultaneous determination of 4 of amino acids, guanidinoacetic acid, S-adenosylmethionine and S-adenosylhomocysteine in human plasma was developed and validated. The method requires no tedious sample preparation, derivatization reagents or ion-pairing reagents. Samples were prepared by combining plasma with a chilled mixture of acetonitrile (ACN) and water, followed by centrifugation and diluting the supernatant with 2 volumes of water. Analytes were dete...

Simultaneous voltammetric sensing of levodopa, piroxicam, ofloxacin and methocarbamol using a carbon paste electrode modified with graphite oxide and β-cyclodextrin.

A carbon paste electrode (CPE) was modified with graphite oxide (GrO) and β-cyclodextrin (CD) to obtain a sensor for simultaneous voltammetric determination of levodopa (LD), piroxicam (PRX), ofloxacin (OFX) and methocarbamol (MCB). The morphology, structure and electrochemical properties of the functionalized GrO were characterized by scanning electron microscopy, energy-dispersive X-ray spectroscopy, contact angle measurements and cyclic voltammetry. Under the optimal experimental conditions, the sensor ...

Determination of 20 perfluoroalkyl substances in greenhouse vegetables with a modified one-step pretreatment approach coupled with ultra performance liquid chromatography tandem mass spectrometry(UPLC-MS-MS).

A new rapid modified one-step QuEChERS (quick, easy, cheap, effective, rugged, and safe) approach was developed for the simultaneous determination of 20 perfluoroalkyl substances (PFASs) from samples of cucumber, lettuce, eggplant, tomato, and leek. Several parameters were optimized. Similar pretreatment approaches were employed for comparison; the results verified the satisfactory performance of this new method. The detection limits of this method for the selected matrices ranged from 0.003 to 0.034 μg...

Stability indicating spectrophotometric methods for quantitative determination of carbamazepine and its degradation product, iminostilbene, in pure form and pharmaceutical formulations.

A stressed study on the stability and degradation behavior under ICH forced degradation conditions of most widely used antiepileptic drug; carbamazepine (CMZ) is presented in this work. The research also includes studying spectrophotometric nature of CMZ and assaying it with mostly used spectrophotometric techniques. Six simple and sensitive spectrophotometric methods are introduced as stability indicating methods for quantitative determination of CMZ and its degradation product, one of its reported potenti...

Multivariate optimization of ultrasound-assisted extraction using Doehlert matrix for simultaneous determination of Fe and Ni in vegetable oils by high-resolution continuum source graphite furnace atomic absorption spectrometry.

A method for simultaneous determination of Fe (232.036 nm) and Ni (232.195 nm) in vegetable oil samples by high-resolution continuum source graphite furnace atomic absorption spectrometry (HR-CS GF AAS) after an acid extraction of the analytes is proposed. In the extraction step, hydrochloric, nitric and acetic acid solutions were tested. The optimization of the procedure was performed by applying Doehlert matrix, and multiple response was used for simultaneous evaluation of the performance of the extra...

Development of rapid, sensitive and selective fluorimetric method for determination of 1-naphthalene acetic acid in cucumber by using magnetite-molecularly imprinted polymer.

In this study, a novel method based on the determination of 1-naphthalene acetic acid with the usage of magnetite-molecularly imprinted polymer prior to fluorimetric detection has been developed. Magnetite-molecularly imprinted polymer has been used for the first time as selective adsorbent for the determination of 1-naphthalene acetic acid. The adsorption capacity of the synthesized polymer was found to be 2.18 ± 0.36 mg g (n = 3). Limit of detection (LOD) and limit of quantification (LOQ) of ...

Development of a simple method for simultaneous determination of tazarotene and betamethasone dipropionate and their metabolites using LC-MS method and its application to dermatopharmacokinetic study.

In our study, the determination methodology of tazarotene and betamethasone dipropionate in human tissue engineering skin was established. The tazarotene gel, betamethasone dipropionate cream, or combination cream was administrated on the skin. Then the skin was taken off on 0.25, 0.75, 1.75, 3, 5, 8, 12, 24, 36, 48 h time point after the residue drug was removed. The concentrations of tazarotene, betamethasone dipropionate and their major metabolites in skin were determinated by LC-MS method. Tazarotene an...

Simultaneous determination of pesticides, mycotoxins, and metabolites as well as other contaminants in cereals by LC-LC-MS/MS.

A 2D LC-MS/MS method for the simultaneous determination of 350 pesticides, 16 mycotoxins as well as the growth regulators Chlormequat and Mepiquat was developed. The method is applicable to cereals and products thereof. Attention should be paid to the simultaneous analysis of the cereal-relevant mycotoxins aflatoxin B1, B2, G1 and G2, ochratoxin A, deoxynivalenol and zearalenone. Moreover, the tropane alkaloids atropine/scopolamine could be integrated into the final method. The samples were extracted with a...

Simultaneous determination of metformin and glimepiride in human serum by ultra high performance liquid chromatography quadrupole time of flight mass spectrometry detection.

This work proposes a simple method for the simultaneous determination of two antidiabetic compounds, metformin and glimepiride, by ultra-high performance liquid chromatography using quadrupole time of flight mass spectrometry detection with electrospray ionization. The method was validated and shown to be linear, selective, accurate and precise. The chromatographic separation was performed using a BEH C18 column (50 mm x 2.1 mm, 1.7 μm particle size). The mobile phase was composed by 0.05% (v/v) ...

Development and validation of a simple LC-MS/MS method for the simultaneous quantitative determination of trimethylamine-N-oxide and branched chain amino acids in human serum.

Serum branched chain amino acids and trimethylamine-N-oxide are monitored as potential indicators of diabetes and cardiovascular health respectively. A rapid method for their simultaneous determination using liquid chromatography and tandem mass spectrometry is described here. Branched chain amino acids and trimethylamine-N-oxide were quantified based on their specific MS/MS fragments using a selected reaction monitoring approach. A number of columns were tested for their ability to separate the analytes. A...


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