Results 81 to 90 of about 165,992 (261)

Automated sequential solid-phase microextraction to address displacement effects in the quantitative analysis of polar compounds

Green Analytical Chemistry, 2023
Solid-phase microextraction (SPME) is a simple and effective sample-preparation technique for the analysis of real-world samples. However, there is a phenomenon that a swelling or saturation of available sorption sites on the solid SPME coating can be ...
Yuanpeng Wang, Janusz Pawliszyn
doaj   +1 more source

Electronic Smoking Devices Among University Students: Usage Patterns and Chemical Composition of Inhaled Substances

Analytical Science Advances, Volume 7, Issue 1, June 2026.
ABSTRACT This study investigated the prevalence of electronic smoking device (ESD) use and its associated behavioural and chemical risks among university students in Bahia, Brazil. A cross‐sectional survey was conducted with 355 students from public and private institutions through an online questionnaire between April and May 2023. Among participants,
Eduard F. Valenzuela, Raffael Silva Santos Almeida, Ivana Ferreira Simões, Aline Gonçalves Miranda, Magno Oliveira Ramos, Roberto Rodrigues Bandeira Tosta Maciel, Fernanda Warken Rosa, Aníbal de Freitas Santos Júnior   +7 more
wiley   +1 more source

Vacuum-assisted headspace solid-phase microextraction for volatile profiling of avocado puree: Application to post-harvest ripening

Journal of Chromatography Open
Vacuum-assisted headspace solid-phase microextraction (Vac-HS-SPME) was developed and applied for the first time to monitor free volatile emissions during post-harvest ripening of Hass and Fuerte avocados.
Angeliki Pateraki, Breno Jorge Pollo, Fabio Augusto, Elefteria Psillakis   +3 more
doaj   +1 more source

Essential oil from Rhaponticum acaule L. roots: Comparative study using HS-SPME/GC/GC–MS and hydrodistillation techniques

Journal of Saudi Chemical Society, 2014
The composition of essential oil extracted from Rhaponticum acaule L. roots growing wild in Algeria was studied by hydrodistillation (HD) and by Head-Space Solid Phase Micro-Extraction (HS-SPME).
Batoul Benyelles, Hocine Allali, Mohamed El Amine Dib, Nassim Djabou, Boufeldja Tabti, Jean Costa   +5 more
doaj   +1 more source

Development of Head Space Sorptive Extraction Method for the Determination of Volatile Compounds in Beer and Comparison with Stir Bar Sorptive Extraction [PDF]

, 2020
A headspace sorptive extraction method coupled with gas chromatography-mass spectrometry (HSSE-GC-MS) was developed for the determination of 37 volatile compounds in beer.
Castro Mejías, Remedios, Durán Guerrero, Enrique, García Barroso, Carmelo, Ruvalcaba, José E.   +3 more
core   +1 more source

From freshness to preservation: insights into processing and storage impacts on purple passion fruit volatilome

Journal of the Science of Food and Agriculture, Volume 106, Issue 4, Page 2139-2153, 15 March 2026.
Abstract BACKGROUND Purple passion fruit is highly appreciated for its distinctive sweet flavour, low acidity, and aromatic profile, making it a desirable choice for fresh consumption and juice production. To ensure microbiological safety and extend shelf life, juice products typically undergo thermal pasteurization, which can alter their ...
Alexandre MA Fonseca, Carlos A Pinto, Jorge A Saraiva, Armando JD Silvestre, Sílvia M Rocha   +4 more
wiley   +1 more source

Headspace Solid-Phase Micro-Extraction Method Optimization and Evaluation for the Volatile Compound Extraction of Bronchoalveolar Lung Lavage Fluid Samples

Separations
Headspace solid-phase micro-extraction (HS-SPME) is a prevalent technique in metabolomics and volatolomics research. However, the performance of HS-SPME can vary considerably depending on the sample matrix.
Antao Gao, Nina Nouri, Keisean Stevenson, Edith T. Zemanick, Jerry A. Nick, Jane E. Hill   +5 more
doaj   +1 more source

Flavor properties of Chinese noodles processed by dielectric drying

Frontiers in Nutrition, 2022
Volatile organic compounds (VOCs) significantly impact food flavor. In this work, Electron nose (E-nose), head space solid phase microextraction-gas chromatography-mass spectrometry (HS-SPME-GC-MS), and head space-gas chromatography-ion mobility ...
Qian Lin, Aiqing Ren, Rui Liu, Yanan Xing, Xiuzhu Yu, Hao Jiang, Hao Jiang   +6 more
doaj   +1 more source

Comparative study on freeze-dried lactic cheese starters and ripening cultures for the production of camembert cheese : a thesis submitted in partial fulfillment of the requirements for the degree of Master of Food Technology, Massy [i.e. Massey] University, Albany, New Zealand. [PDF]

, 2013
Background and Methodology The key to success in producing cheeses is the performance of the starter cultures (Parente and Cogan, 2004). Storage of freeze-dried cheese cultures at refrigeration and ambient temperature or higher provides convenience ...
Qiao, Wei
core  

Determination of total and available fractions of PAHs by SPME in oily wastewaters : overcoming interference from NAPL and NOM [PDF]

, 2009
Background, aim, and scope Polycyclic aromatic hydrocarbons (PAHs) are often found in oily wastewaters. Their presence is usually the result of human activities and has a negative effect on the environment.
AJ King, AJ King, António G. Brito, CL Arthur, CL Arthur, CR Maxin, DW Potter, EU Ramos, F Busetti, G Ouyang, G Ouyang, H Wong, J Ai, J Poerschmann, J Poerschmann, J Rumble, JD Hamme Van, JD Kubicki, José M. Oliveira, João Peixoto, KD Jones, M Al Zarooni, M Brigante, MA Schlautman, P Mayer, P-H Lee, R Doong, R Doong, Regina Nogueira, RJ Bartelt, Rui B. Gomes, S Lesage, S Shokrollahzadeh, SK Samanta, T Gorecki, T Kose, T Luan, W Zhu, WHJ Vaes, Z Zhang, Z Zhang, Z Zhang   +41 more
core   +1 more source