نتایج جستجو برای: headspace solid phase microextraction

تعداد نتایج: 755834  

2010
S P Cummings A Nelson P J Purcell A De Soyza S J Bourke

chiectasis and Cystic Fibrosis clinics. The gold standard for diagnosing P. aeruginosa infection was positive sputum cultures. 72 sputum samples were analysed. A sputum sample was kept in a glass vial with a cap containing septum. The septum was pierced with a solid phase microextraction (SPME) fibre allowing sampling of the headspace for 50 min at 378C before transferring the fibre into gas ch...

Journal: :Molecules 2011
Igor Jerković Zvonimir Marijanović Mladenka Malenica Staver

Headspace solid-phase microextraction (HS-SPME; PDMS/DVB fibre) and ultrasonic solvent extraction (USE; solvent A: pentane and diethyl ether (1:2 v/v), solvent B: dichloromethane) followed by gas chromatography and mass spectrometry (GC, GC-MS) were used for the analysis of Prunus mahaleb L. honey samples. Screening was focused toward chemical composition of natural organic volatiles to determi...

Journal: :Food Packaging and Shelf Life 2022

This article studies the migration of MOAH from hot melt adhesives used in multilayer laminates into food simulants. First, initial concentration a group compounds selected as markers several was determined by headspace solid phase microextraction coupled to gas chromatography mass spectrometry (HS-SPME-GC-MS), using previously optimised method. Then, fraction and studied. The analysed with fla...

Journal: :Food Chemistry 2021

Abstract 2-Acetyl-1-pyrroline (2-AP) has been widely reported as a key contributor to the popcorn-like aroma of fragrant rice (Oryza sativa). To gain greater understanding its contribution in both and non-fragrant rice, sensory profiling was conducted with trained panel examine properties six boiled samples, three varieties. The intensity popcorn note an orthonasal odour, retronasal flavour aft...

Journal: :analytical and bioanalytical chemistry research 2014
mir ali farajzadeh leila khoshmarram saheleh sheykhizadeh

foodstuffs analysis is very important due to population growth and increasing consumer demand for safety and nutritional excellence. the analysis of different compounds in foodstuffs is so difficult without using sample preparation techniques. traditional techniques require large amounts of toxic organic solvents. as a result, they are not only expensive but also environmentally unfriendly and ...

Journal: :Pesquisa Agropecuária Tropical 2023

ABSTRACT Rice blast caused by the Magnaporthe oryzae pathogen is a major disease in this crop, and may cause devastating losses. This study aimed to investigate profile of Waitea circinata mycorrhiza volatile compounds antagonism M. oryzae, under different growth periods temperatures, using completely randomized design. Volatile organic were extracted headspace solid phase microextraction analy...

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