Category Archives: QuEChERS

Use of onion extract as a dairy cattle feed supplement: monitoring propyl propane thiosulfonate as a marker of its effect on milk attributes.

Posted on 28 February, 2017 by fqm302

Onion extract is used as a feed supplement for the diet of dairy cows, acting as inhibitor of methane production; however, its properties could alter sensory attributes of milk. In this work, we propose a method to evaluate the influence … Continue reading →

Posted in Animal feed, HPLC, PTSO, QuEChERS, UV-vis | Tagged , , | Comments Off on Use of onion extract as a dairy cattle feed supplement: monitoring propyl propane thiosulfonate as a marker of its effect on milk attributes.

High-throughput methodology for the determination of carbamates in food supplements by UHPLC–MS/MS.

Posted on 28 February, 2017 by fqm302

Food supplements are increasingly consumed products that claim to have several benefits for health. In many cases, these supplements contain herbal products and, as a consequence, can be contaminated with pesticides used in crops. This study aimed to use a … Continue reading →

Posted in AGL2015-70708-R, Carbamates, Mass spectrometry, QuEChERS, Supplements, UHPLC | Tagged , , | Comments Off on High-throughput methodology for the determination of carbamates in food supplements by UHPLC–MS/MS.

Evaluation of a new modified QuEChERS method for the monitoring of carbamate residues in high-fat cheeses by using UHPLC–MS/MS.

Posted on 27 February, 2017 by fqm302

A simple and efficient method for the determination of 28 carbamates in high-fat cheeses is proposed. The methodology is based on a modified quick, easy, cheap, effective, rugged, and safe procedure as sample treatment using a new sorbent (Z-Sep+) followed … Continue reading →

Posted in Carbamates, Cheese, Mass spectrometry, P12-AGR-1647, QuEChERS, UHPLC | Tagged , , | Comments Off on Evaluation of a new modified QuEChERS method for the monitoring of carbamate residues in high-fat cheeses by using UHPLC–MS/MS.

QuEChERS-based method for the determination of carbamate residues in aromatic herbs by UHPLC-MS/MS

Posted on 16 September, 2016 by fqm302

A new reliable, fast and highly sensitive method based on ultra-high performance liquid chromatography tandem mass spectrometry has been developed and validated for the determination of 28 carbamates in aromatic herbs. A modified QuEChERS-based method was optimized for the extraction … Continue reading →

Posted in AGL2015-70708-R, Aromatic herbs, Carbamates, Mass spectrometry, QuEChERS, UHPLC | Tagged | Comments Off on QuEChERS-based method for the determination of carbamate residues in aromatic herbs by UHPLC-MS/MS

Method optimization and validation for the determination of eight sulfonamides in chicken muscle and eggs by modified QuEChERS and liquid chromatography with fluorescence detection

Posted on 10 March, 2016 by fqm302

A simple, effective and reliable method for the determination of eight sulfonamide antibiotics (sulfadiazine, sulfapiridine, sulfamerazine, sulfamethazine, sulfachloropiridazine, sulfamethoxazole, sulfadoxine, sulfadimethoxin) in chicken muscle and eggs by liquid chromatography and fluorescence detection has been developed and validated. Sulfonamides do not … Continue reading →

Posted in Chicken muscle, Eggs, Fluorescence, P12-AGR-1647, QuEChERS, Sulfonamides | Tagged | Comments Off on Method optimization and validation for the determination of eight sulfonamides in chicken muscle and eggs by modified QuEChERS and liquid chromatography with fluorescence detection

Development of a QuEChERS-based extraction method for the determination of destruxins in potato plants by UHPLC–MS/MS

Posted on 15 December, 2015 by fqm302

Ultra high performance liquid chromatography–tandem mass spectrometry (UHPLC–MS/MS) with electrospray ionization has been proposed for the determination of fifteen natural destruxins (A, B, C, D, E, Ed, Ed1, A2, B2, D2, E2, Cl, DesmA, DesmB, and DH-A), secondary metabolites with … Continue reading →

Posted in Destruxins, Mass spectrometry, Metabolites, Mycotoxins, Plants, Potato plant, QuEChERS, UHPLC | Tagged | Comments Off on Development of a QuEChERS-based extraction method for the determination of destruxins in potato plants by UHPLC–MS/MS

Simple methodology for the determination of mycotoxins in pseudocereals, spelt and rice

Posted on 4 September, 2013 by fqm302

Nowadays the interest and consumption of pseudocereals is increasing due to their nutritional properties. Like cereals and oilseeds, pseudocereal seeds are susceptible to fungal growth and mycotoxin contamination; however these matrices have received little attention in literature. A sensitive, simple … Continue reading →

Posted in Mass spectrometry, Pseudocereals, QuEChERS, Rice, Spelt, UHPLC | Tagged | Comments Off on Simple methodology for the determination of mycotoxins in pseudocereals, spelt and rice

Alternative sample treatments for the determination of sulfonamides in milk by HPLC with fluorescence detection

Posted on 3 September, 2013 by fqm302

This paper presents two sample treatments, dispersive liquid–liquid microextraction (DLLME) and QuEChERS for the determination of 9 sulfonamides, regulated by the EU Council in milk samples. Both methods represent useful alternatives to conventional procedures based mainly in solid-phase extraction, in … Continue reading →

Posted in DLLME, Fluorescence, Milk, QuEChERS, Sulfonamides | Tagged | Comments Off on Alternative sample treatments for the determination of sulfonamides in milk by HPLC with fluorescence detection

A new approach in sample treatment combined with UHPLC-MS/MS for the determination of multiclass mycotoxins in edible nuts and seeds

Posted on 15 May, 2013 by fqm302

A sensitive, simple and rapid method for the determination of fourteen mycotoxins in nuts and seeds (including almonds, peanuts, sunflower seeds, pumpkin seeds, walnuts, macadamia nuts, pistachios, hazelnuts and pine nuts) has been developed using ultra-high performance liquid chromatography coupled … Continue reading →

Posted in DLLME, Mass spectrometry, Nuts, QuEChERS, Seeds, UHPLC | Tagged | Comments Off on A new approach in sample treatment combined with UHPLC-MS/MS for the determination of multiclass mycotoxins in edible nuts and seeds

Multiclass mycotoxin analysis in Silybum marianum by ultra high performance liquid chromatography–tandem mass spectrometry using a procedure based on QuEChERS and dispersive liquid–liquid microextraction

Posted on 26 February, 2013 by fqm302

Ultra high performance liquid chromatography–tandem mass spectrometry (UHPLC–MS/MS) has been proposed for the determination of 15 mycotoxins in milk thistle (Silybum marianum), including aflatoxins, fumonisins, trichothecenes, ochratoxin A, citrinin, sterigmatocystin and zearalenone. The mycotoxins were detected by electrospray ionization in … Continue reading →

Posted in DLLME, Mass spectrometry, Milk thistle, Mycotoxins, QuEChERS, UHPLC | Tagged | Comments Off on Multiclass mycotoxin analysis in Silybum marianum by ultra high performance liquid chromatography–tandem mass spectrometry using a procedure based on QuEChERS and dispersive liquid–liquid microextraction