IDENTIFICATION OF ODOR COMPONENTS OF AGARWOOD

2015 ◽  
Vol 77 (2) ◽  
Author(s):  
Nor Azah Mohamad Ali ◽  
Nurlaila Ismail ◽  
Mailina Jamil ◽  
Azrina Aziz ◽  
Sahrim Lias ◽  
...  
Keyword(s):  
Solid Phase Microextraction ◽  
Solid Phase ◽  
Chemical Compounds ◽  
Sensor Technology ◽  
Gas Chromatography Mass Spectrometry ◽  
Z Score ◽  
Spme Fiber ◽  
Odor Compounds ◽  
Marker Compounds ◽  
Significant Chemical

This article presents the use of Z-score in assessing the significant chemical compounds extracted by head space solid phase microextraction (HS-SPME) and gas chromatography – mass spectrometry (GC-MS) analysis of an agarwood oil obtained from Melaka, Malaysia. Two types of SPME fiber; polydimethylsiloxane (PDMS) and divinylbenzene-carboxen-polydimethylsiloxane (DVB-CAR-PDMS) were used. During the extraction analysis, the results showed that at least 27 and 29 compounds were identified using PDMS and DVB-CAR-PDMS fiber, respectively. DVB-CAR-PDMS fiber was found to be more efficient in terms of selectivity of compounds extraction. The application of Z-score showed that eight and eleven marker compounds were determined in PDMS and DVB-CAR-PDMS fibers, respectively. 4-Phenyl-2-butanone, a-guaiene, β-agarofuran, a-bulnesene, a-agarofuran and 10-epi-g-eudesmol were some of the compounds selected and were often reported significantly in agarwood oils as key odor compounds. The information gathered will be used for compound selection towards grading of agarwood oils by sensor technology.

scholarly journals Application of aluminosilicates for mitigation of ammonia and volatile organic compound emissions from poultry manure

2015 ◽  
Vol 13 (1) ◽  
Author(s):  
Sebastian Opaliński ◽  
Mariusz Korczyński ◽  
Marek Szołtysik ◽  
Zbigniew Dobrzański ◽  
Roman Kołacz
Keyword(s):  
Solid Phase Microextraction ◽  
Solid Phase ◽  
Poultry Manure ◽  
Gas Chromatography Mass Spectrometry ◽  
Expanded Vermiculite ◽  
Volatile Organic ◽  
Livestock Buildings ◽  
Odor Compounds ◽  
Volatile Organic Compound Emissions ◽  
Livestock Building

AbstractOdor mitigation techniques are widely investigated due to the problem of odor nuisance generated by intensive livestock production. The goal of this research was to investigate the use of aluminosilicate sorbents as filter packs in the air scrubber ODOR1, which enables cleaning of air inside the livestock building. The following sorbents were examined: raw halloysite, roasted halloysite, activated halloysite, raw bentonite, roasted bentonite and expanded vermiculite. The experiment was conducted in chambers where poultry manure was placed, the time of air treatment was 24 hours. A manual SPME (solid-phase microextraction) holder with DVB/Carboxen/PDMS fiber was used for extraction of odor compounds, and analyses were carried out using gas chromatography-mass spectrometry. Ammonia concentrations were determined according to Polish standards (Nessler method) using a spectrophotometer. It was found that all examined aluminosilicates had the potential for removal of ammonia as well as 24 volatile compounds emitted from poultry manure. The highest efficiency was noted for activated halloysite (81%) and roasted bentonite (84%) in the case of ammonia and odors, respectively. Despite the limitations of the study, the results showed the effectiveness of the air scrubber packed with aluminosilicates for the reduction of volatile odorous compounds in the air of livestock buildings.

Optimization of Headspace Sampling Using Solid-Phase Microextraction (SPME) for Volatile Components in Starfruit Juice

2013 ◽  
Vol 9 (2) ◽  
pp. 227-232 ◽  
Author(s):  
Abdul Ghani Liew Abdullah ◽  
Nik Meriam Sulaiman ◽  
Mohamed Kheireddine Aroua ◽  
Che Rosmani Che Hassan
Keyword(s):  
Solid Phase Microextraction ◽  
Solid Phase ◽  
Selective Adsorption ◽  
Sample Volume ◽  
Gas Chromatography Mass Spectrometry ◽  
Volatile Components ◽  
Spme Fiber ◽  
Ripening Stages ◽  
Adsorption Temperature ◽  
Experimental Parameters

AbstractVolatiles are important flavor compounds of fruit juices and beverages. In this study, a headspace Solid-phase microextraction (SPME) gas chromatography-mass spectrometry (GC-MS) was used to analyze the volatile components in starfruit juices. Several experimental parameters (e.g. adsorption temperature, adsorption time, and sample volume) were optimized to improve sampling efficiency in two aspects; maximum adsorption and selective adsorption of volatile components onto SPME fiber. The following conditions were found to be optimal for selectivity and sensitivity: adsorption temperature of 50°C for 30 min, with a 65 μm divinylbenzene /polydimethylsiloxane (DVB/PDMS)-coated fiber with a sample volume of 15 g in a 30-ml vial. The proposed technique could be applied for the analysis of volatile compounds that contribute to starfruit juices flavor in different cultivars, and also their ripening stages.

Disposable solid-phase microextraction fiber coupled with gas chromatography-mass spectrometry for complex matrix analysis

2014 ◽  
Vol 6 (13) ◽  
pp. 4895-4900 ◽  
Author(s):  
Jianqiao Xu ◽  
Shuming He ◽  
Ruifen Jiang ◽  
Fang Zhu ◽  
Jingwen Ruan ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Solid Phase Microextraction ◽  
Solid Phase ◽  
Low Cost ◽  
Steel Wire ◽  
Matrix Analysis ◽  
Gas Chromatography Mass Spectrometry ◽  
Complex Matrix ◽  
Spme Fiber

A low-cost SPME fiber was prepared by mounting commercially available polydimethylsiloxane tubing on stainless steel wire with epoxy glue.

scholarly journals Determination of Bisphenol Ain Water by Isotope Dilution Headspace Solid-Phase Microextraction and Gas Chromatography/Mass Spectrometry Without Derivatization

2008 ◽  
Vol 91 (3) ◽  
pp. 622-629 ◽  
Author(s):  
Xu-Liang Cao ◽  
Jeannette Corriveau
Keyword(s):  
Detection Limit ◽  
Solid Phase Microextraction ◽  
Solid Phase ◽  
Gas Chromatography Mass Spectrometry ◽  
Method Detection Limit ◽  
Spme Fiber ◽  
Relative Standard ◽  
Headspace Spme ◽  
Epoxy Resin Adhesive

Abstract The original solid-phase microextraction (SPME) fibers use an epoxy resin adhesive that releases bisphenol A (BPA) during thermal desorption of the fiber. This adversely affects the method detection limit and accuracy when these products are used for the determination of BPA. In this work, 5 new metal alloy SPME fibers that do not use epoxy resins were compared for the extraction of BPA in water. The performance of the optimum SPME fiber with 60 m carbowax-polyethylene glycol coating for the headspace SPME of BPA in water was investigated systematically under different extraction conditions. Salt was found to increase the partitioning of BPA from water into the headspace until saturation was reached. Partitioning of BPA from water into the headspace also increased at higher extraction temperatures, as did longer extraction times. However, extraction of BPA from water onto the SPME fiber was not improved for solutions adjusted to pH 2 compared to the unadjusted neutral solutions. The new BPA method showed good linearity over the concentration range of 2.5 to 40 g/L [correlation coefficient (r2) = 0.995] .The method detection limit for BPA was 0.5 g/L, while the instrument detection limit was as low as 0.05 g/L. Good repeatability was observed for BPA at levels of 5 and 20 g/L with relative standard deviation values <10. The automated headspace SPME method developed in this work was used to investigate migration of BPA from polycarbonate bottles into water, and levels of BPA in water ranged from 1.7 to 4.1 g/L.

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