Results 181 to 190 of about 1,913,440 (221)

Volatiles from flowers of Photinia serrulata by HS-SPME-GC-MS

Chemistry of Natural Compounds, 2013
Photinia serrulata Lindl. belongs to the Rosaceae family and is distributed in Shanxi, Gansu, Anhui, Jiangsu, Henan, and Hunan Provinces in China [1]. Phytochemical research showed that triterpenoids and cyanophoric glycosides, for example, ursane triterpenoids and analogs, ursolic acid, oleanolic acid, prunasin, and saponin, were the main compounds in
Jin-Feng Wei, Zhen-Hua Yin, Wen-Yi Kang
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Determination of Volatile Nitrosamines in Latex Products by HS-SPME–GC–MS

Chromatographia, 2011
Nitrosamines which have been detected in various latex products are carcinogens. The method for determination of volatile nitrosamines in latex products was developed using a combination of headspace solid phase micro-extraction (HS-SPME) and gas chromatography–mass spectrometry (GC–MS).
Di Feng, Luo Liu, Liyuan Zhao, Qingfeng Zhou, Tianwei Tan   +4 more
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Simple determination of formaldehyde in fermented foods by HS‐SPME‐GC/MS

International Journal of Food Science & Technology, 2011
SummaryWe describe an automatic method to detect formaldehyde (FA) in some fermented foods. This method is based on derivatisation with 2,2,2‐trifluoroethylhydrazine (TFEH) and consecutive headspace solid‐phase micro‐extraction and gas chromatography‐mass spectrometry.
Ho‐Sang Shin, Hyun‐Hee Lim
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Analysis of volatiles in Belamcanda chinensis flowers by HS-SPME-GC-MS

Chemistry of Natural Compounds, 2013
The major volatile constituents of B. chinensis flowers were aldehydes (20.4%), ketones (27.3%), esters (15.5%), and fatty acids (15.1%). The main compounds were 6-methyl-5-hepten-2-one (14.6%), isovaleraldehyde (7.9%), methyl hexadecanoate (6.7%), and n-hexadecanoic acid (6.4%). Jian et al. have separated 12 components, and 6 compounds were identified
Jin-mei Wang, Yi-bing Zhang, Wen-Yi Kang
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An optimised HS-SPME-GC-MS method for the detection of volatile nitrosamines in meat samples

Food Additives & Contaminants: Part A, 2019
A method to detect volatile nitrosamines in meat samples was developed using headspace sampling by solid-phase microextraction (HS-SPME), with analysis by GC-MS. A 50/30 µm divinylbenzene/carboxen/polydimethylsiloxane fused silica fibre was selected to extract a total of nine volatile nitrosamines: N-nitrosodimethylamine, N-nitrosomethylethylamine, N ...
Joy, Roasa, Huaizhi, Liu, Suqin, Shao
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Stable isotope dilution analysis of wine fermentation products by HS-SPME-GC-MS

Analytical and Bioanalytical Chemistry, 2005
The aim of this study was to quantify, in a single analysis, 31 volatile fermentation-derived products that contribute to the aroma of red and white wine. We developed a multi-component method based on headspace solid-phase microextraction coupled with gas chromatography mass spectrometry (HS-SPME-GC-MS).
Siebert, T., Smyth, H., Capone, D., Neuwohner, C., Pardon, K., Skouroumounis, G., Herderich, M., Sefton, M., Pollnitz, A.   +8 more
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Method development by GC–ECD and HS-SPME–GC–MS for beer volatile analysis

Food Chemistry, 2015
Two methods for the extraction, identification and quantification of the highest occurrence and lowest perception threshold off-flavours in fifteen different samples of Brazilian Pilsner beers were developed. For this purpose, headspace solid phase microextraction in combination with a gas chromatography coupled to a mass spectrometric detection (HS ...
Gisele C, da Silva, Abner A S, da Silva, Larissa S N, da Silva, Ronoel Luiz de O, Godoy, Luciana C, Nogueira, Simone L, Quitério, Renata S L, Raices   +6 more
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Analysis of the volatile compounds in Ligusticum chuanxiong Hort. using HS-SPME–GC-MS

Journal of Pharmaceutical and Biomedical Analysis, 2007
A headspace solid-phase microextraction (HS-SPME) method followed by gas chromatography-mass spectrometry (GC-MS) is described for the analysis of volatile compounds in the dry rhizome of Ligusticum chuanxiong Hort. Three types of SPME fibers including PDMS, PDMS-DVB and DVB-CAR-PDMS were investigated and the best extraction was achieved with the mixed
Cong, Zhang, Meiling, Qi, Qinglong, Shao, Shan, Zhou, Ruonong, Fu   +4 more
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Determination of Residual Dimethyl Sulfate in Cephalosporin Using HS-SPME/GC–MS

Journal of Chromatographic Science
Abstract Dimethyl sulfate (DMS) is widely used in manufacturing process but because of its genotoxicity nature, it should be monitored at trace levels (1 μg/mL). It is complicated and difficult to quantify DMS in cephalosporin with traditional method.
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Straightforward and rapid determination of acrylamide in coffee beans by means of HS-SPME/GC-MS

Food Chemistry, 2019
A straightforward and rapid preparation procedure for the extraction of the acrylamide from coffee beans, by means of the volatile silylated derivatives of acrylamide (AA) and headspace solid phase microextraction (HS-SPME) is described. Commercially available SPME fibre coated with polydimethylsiloxane (PDMS) was used.
Rafał, Wawrzyniak, Beata, Jasiewicz
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