Vera Homem
University of Porto
Environmental chemistryDetection limitGas chromatographyEngineeringMass spectrometryChemistryGas chromatography–mass spectrometryGeographyQuechersGalaxolideSynthetic muskEnvironmental scienceChromatographyExtraction (chemistry)Waste managementSewage treatmentCartographyPollutantEnvironmental engineeringWastewater
65Publications
19H-index
1,801Citations
Publications 65
Newest
#1Sara Ramos (University of Porto)H-Index: 6
#2Vera Homem (University of Porto)H-Index: 19
Last. Lúcia Santos (University of Porto)H-Index: 47
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Abstract null null In the last years, the number of wastewater treatment plants (WWTPs) has increased and consequently, sewage sludge production. This residue is very rich in crop nutrients, which makes it prone to be used as organic fertilizer or soil conditioner for agriculture. However, the presence of emerging pollutants in these fertilizers has raised concern, namely their potential accumulation in soil and, eventually their uptake by crops. Therefore, the main goal of this work was to stud...
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Volatile methylsiloxanes (VMSs) constitute a group of compounds used in a great variety of products, particularly personal care products. Due to their massive use, they are continually discharged into wastewater treatment plants and are increasingly being detected in wastewater and in the environment at low concentrations. The aim of this work was to develop and validate a fast and reliable methodology to screen seven VMSs in water samples, by headspace solid-phase microextraction (HS-SPME) foll...
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#1Sara Ramos (University of Porto)H-Index: 6
#2Vera Homem (University of Porto)H-Index: 19
Last. Lúcia Santos (University of Porto)H-Index: 47
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A simple method for the analysis of thirteen synthetic musk compounds and six ultraviolet filters in soil samples was developed using a modified dispersive solid-phase methodology known as "Quick, Easy, Cheap, Effective, Rugged and Safe", followed by gas chromatography - triple quadrupole mass spectrometry (GC-MS/MS). The methodology was validated assessing linearity ranges, detection limits, precision, and accuracy. The method detection limit ranged between 0.01 and 10.00 ng g-1 dry weight and ...
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#1Providencia González-Hernández (ULL: University of La Laguna)H-Index: 1
#2Idaira Pacheco-Fernández (ULL: University of La Laguna)H-Index: 9
Last. Verónica Pino (ULL: University of La Laguna)H-Index: 34
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Abstract A headspace solid-phase microextraction (HS-SPME) method was developed using the metal-organic framework (MOF) CIM-80(Al) as extraction phase and in combination with gas chromatography-mass spectrometry (GC-MS) for the simultaneous determination of 6 methylsiloxanes and 7 musk fragrances in different environmental waters. The chromatographic separation was optimized in different GC instruments equipped with different detectors, allowing the correct separation and identification of the c...
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#1Joana Silva (University of Porto)H-Index: 12
#2Fábio Bernardo (University of Porto)
Last. Vera Homem (University of Porto)H-Index: 19
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Volatile methylsiloxanes are wastewater organic pollutants originating from industrial and personal care products. They accumulate in sewage sludge and hamper biogas production through the formation of silicon dioxide on the surfaces of gas engines and turbines, yet there is few knowledge on their fate in sludge treatment systems. Here we studied the occurrence and removal of seven volatile methylsiloxanes along the solid treatment line of an urban wastewater treatment plant. We analyzed 75 slud...
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#1Anabela Borges (University of Porto)H-Index: 21
#2Helena José (University of Porto)H-Index: 1
Last. Manuel Simões (University of Porto)H-Index: 62
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Ethnopharmacological use of plant natural extracts has been known since ancient times. The optimization of plant molecule extraction is fundamental in obtaining relevant extraction yields. The main purpose of this study was to understand the role of different extraction techniques (solid-liquid, ultrasound, Soxhlet, and microwave) and solvents (water, methanol, ethanol, acetone, dichloromethane, and hexane) on the antimicrobial and antioxidant activities of extracts from Olea europaea (olive) an...
6 CitationsSource
#1Vera Homem (University of Porto)H-Index: 19
#2Nuno Ratola (University of Porto)H-Index: 25
Silicon materials are widespread in our daily life and in numerous industrial applications, and this started raising concerns in the scientific community a couple of decades ago regarding the potential negative effects these chemicals could have in the environment and human health. Naturally, analytical methodologies were required to assess their presence around us. In particular, volatile methylsiloxanes (VMSs) have been the focus of research in this field, and their presence has been determine...
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#1Sara Ramos (University of Porto)H-Index: 6
#2Vera Homem (University of Porto)H-Index: 19
Last. Lúcia Santos (University of Porto)H-Index: 47
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Abstract A Quick, Easy, Cheap, Effective, Rugged and Safe (QuEChERS) methodology followed by gas chromatography-tandem mass spectrometry (GC-MS/MS) analysis was developed to extract thirteen synthetic musk compounds (SMCs: cashmeran, celestolide, phantolide, traseolide, galaxolide, tonalide, musk ambrette, musk xylene, musk ketone, musk tibetene, musk moskene, ethylene brassylate and exaltolide) and six ultraviolet-filters (UVFs: 2-ethylhexyl 4-dimethylaminobenzoate, 3-(4′-methylbenzylidene) cam...
1 CitationsSource
#1Maria Celeiro (University of Santiago de Compostela)H-Index: 13
#2J. Pablo Lamas (University of Santiago de Compostela)H-Index: 23
Last. Maria Llompart (University of Santiago de Compostela)H-Index: 49
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Abstract A methodology based on solid-phase microextraction (SPME) followed by gas chromatography–tandem mass spectrometry (GC–MS/MS) was developed for the simultaneous analysis of different families of personal care products (PCPs) including fragrance allergens, synthetic musks, phthalates, antioxidants and UV filters in continental waters. The main parameters affecting SPME procedure were optimized by an ANOVA study. The final selected conditions comprised the use of 10 mL of sample with 20 % ...
6 CitationsSource
#1Natalia Soledad Graziani (National University of Cordoba)H-Index: 3
#2Maria Florencia Tames (National University of Cordoba)H-Index: 1
Last. Hebe Alejandra Carreras (National University of Cordoba)H-Index: 20
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Abstract Many persistent organic pollutants (POPs) have been banned in many countries including Argentina after enforcing the Stockholm Convention in 2014, while other emerging semi-volatile organic contaminants (SVOCs) are considered to enter the list due to their known environmental persistence and toxicity. However, there is still very little information regarding the distribution of these chemicals in the environment in developing countries. To address this issue, we employed leaves of Ligus...
4 CitationsSource