Search Results - "Neng, N R"

Adsorptive micro-extraction techniques—Novel analytical tools for trace levels of polar solutes in aqueous media by Neng, N.R., Silva, A.R.M., Nogueira, J.M.F.

“…A novel enrichment technique, adsorptive μ-extraction (AμE), is proposed for trace analysis of polar solutes in aqueous media. The preparation, stability tests…”
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Development of a bar adsorptive micro-extraction–large-volume injection–gas chromatography–mass spectrometric method for pharmaceuticals and personal care products in environmental water matrices by Neng, N. R., Nogueira, J. M. F.

“…The combination of bar adsorptive micro-extraction using activated carbon (AC) and polystyrene–divinylbenzene copolymer (PS-DVB) sorbent phases, followed by…”
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Antioxidant and Cytotoxic Activities of Carob Tree Fruit Pulps Are Strongly Influenced by Gender and Cultivar by Custódio, L, Fernandes, E, Escapa, A. L, Fajardo, A, Aligué, R, Alberício, F, Neng, N. R, Nogueira, J. M. F, Romano, A

“…Extracts from fruit pulps of six female cultivars and two hermaphrodite Portuguese carob trees [(Ceratonia siliqua L., Fabaceae)] exhibited strong antioxidant…”
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Development, optimisation and application of polyurethane foams as new polymeric phases for stir bar sorptive extraction by Neng, N.R., Pinto, M.L., Pires, J., Marcos, P.M., Nogueira, J.M.F.

“…In this contribution, polyurethane foams are proposed as new polymeric phases for stir bar sorptive extraction (SBSE). Assays performed for polyurethane…”
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Cork-based activated carbons as supported adsorbent materials for trace level analysis of ibuprofen and clofibric acid in environmental and biological matrices by Neng, N.R., Mestre, A.S., Carvalho, A.P., Nogueira, J.M.F.

“…In this contribution, powdered activated carbons (ACs) from cork waste were supported for bar adsorptive micro-extraction (BAμE), as novel adsorbent phases for…”
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Determination of short-chain carbonyl compounds in drinking water matrices by bar adsorptive micro-extraction (BAμE) with in situ derivatization by Neng, N. R, Nogueira, J. M. F

“…In this contribution, bar adsorptive micro-extraction using polystyrene-divinylbenzene sorbent phase and in situ derivatization with pentafluorophenyl…”
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Profiling of antioxidant potential and phytoconstituents of Plantago coronopus by Pereira, C G, Custódio, L, Rodrigues, M J, Neng, N R, Nogueira, J M F, Carlier, J, Costa, M C, Varela, J, Barreira, L

“…The halophyte species Plantago coronopus has several described ethnomedicinal uses, but few reported biological activities. This work carried out for the first…”
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Powdered activated carbons as effective phases for bar adsorptive micro-extraction (BAμE) to monitor levels of triazinic herbicides in environmental water matrices by Neng, N.R., Mestre, A.S., Carvalho, A.P., Nogueira, J.M.F.

“…Bar adsorptive micro-extraction using three powdered activated carbons (ACs) as adsorbent phases followed by liquid desorption and high performance liquid…”
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Determination of glyoxal and methylglyoxal in environmental and biological matrices by stir bar sorptive extraction with in-situ derivatization by Neng, N.R., Cordeiro, C.A.A., Freire, A.P., Nogueira, J.M.F.

“…Stir bar sorptive extraction with in-situ derivatization using 2,3-diaminonaphthalene (DAN) followed by liquid desorption and high performance liquid…”
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Application of a bar adsorptive microextraction based methodology for doping control of alkylamine stimulants in urine matrices by Almeida, C.V.P., Neng, N.R., Nogueira, J.M.F., Ruivo, J.

“…•An alternative analytical methodology for the analysis of Alkyl Amines Stimulants.•Application of Bar Adsorptive MicroExtraction to Urine Samples.•Validation…”
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Development of a Powdered Activated Carbon in Bar Adsorptive Micro-Extraction for the Analysis of Morphine and Codeine in Human Urine by Gonçalves, A.F.P., Neng, N.R., Mestre, A.S., Carvalho, A.P., Nogueira, J.M.F.

“…In the present work, bar adsorptive microextraction using an activated carbon (AC) adsorbent phase followed by liquid desorption and high-performance liquid…”
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Bar adsorptive microextraction coated with multi-walled carbon nanotube phases - Application for trace analysis of pharmaceuticals in environmental waters by Abujaber, F., Ahmad, S.M., Neng, N.R., Rodríguez Martín-Doimeadios, R.C., Guzmán Bernardo, F.J., Nogueira, J.M.F.

“…•First time carbon nanotubes are used as sorbents in bar adsorptive microextraction.•Four widely used pharmaceuticals were determined in different types of…”
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Development and Application of Stir Bar Sorptive Extraction with Polyurethane Foams for the Determination of Testosterone and Methenolone in Urine Matrices by Sequeiros, R.C.P., Neng, N.R., Portugal, F.C.M., Pinto, M.L., Pires, J., Nogueira, J.M.F.

“…This work describes the development, validation, and application of a novel methodology for the determination of testosterone and methenolone in urine matrices…”
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Bar adsorptive microextraction (BAμE) coated with mixed sorbent phases—Enhanced selectivity for the determination of non-steroidal anti-inflammatory drugs in real matrices in combination with capillary electrophoresis by Ahmad, S.M., Almeida, C., Neng, N.R., Nogueira, J.M.F.

“…•The use of BAμE coated with mixed phases for the first time.•The combination of BAμE with capillary electrophoresis for the analysis of NSAIDs.•A fully…”
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Enhancement for trace analysis of sulfonamide antibiotics in water matrices using bar adsorptive microextraction (BAμE) by Ide, A.H., Ahmad, S.M., Neng, N.R., Nogueira, J.M.F.

“…[Display omitted] •An alternative technique for trace level analysis of sulfonamide antibiotics in water matrices.•Comparison of the selectivity of activated…”
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Monitoring traces of organochlorine pesticides in herbal matrices by bar adsorptive microextraction - Application to black tea and tobacco by Ahmad, S. M., Gomes, M. I., Ide, A. H., Neng, N. R., Nogueira, J. M. F.

“…Bar adsorptive microextraction followed by microliquid desorption and gas chromatography-mass spectrometry, under the selected ion monitoring acquisition mode,…”
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Determination of mitragynine in urine matrices by bar adsorptive microextraction and HPLC analysis by Neng, N.R., Ahmad, S.M., Gaspar, H., Nogueira, J.M.F.

“…Bar adsorptive microextraction combined with liquid desorption followed by high performance liquid chromatography with diode array detection (BAµE-LD/HPLC-DAD)…”
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Determination of tributyltin in environmental water matrices using stir bar sorptive extraction with in-situ derivatisation and large volume injection-gas chromatography–mass spectrometry by Neng, N.R., Santalla, R.P., Nogueira, J.M.F.

“…Stir bar sorptive extraction with in-situ derivatization using sodium tetrahydridoborate (NaBH4) followed by liquid desorption and large volume injection-gas…”
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Application of bar adsorptive microextraction (BAμE) for anti-doping control screening of anabolic steroids in urine matrices by Ahmad, S.M., Almeida, C., Neng, N.R., Nogueira, J.M.F.

“…•Alternative approach for trace level analysis of T and E anabolic steroids in urine matrices.•Optimized methodology to monitor testosterone, epitestosterone…”
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Application of polyurethane-based devices as sorption-desorption phases for microextraction analysis – The all-in-one microextraction concept by Mourão, M.P.B., Silva, I., Almeida, C., Neng, N.R., Nogueira, J.M.F.

“…•Polyurethane-based devices as novel sorption-desorption phases for microextraction analysis.•A new all-in-one microextraction approach using the main concepts…”
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