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Comparison of diferent aroma active compounds of Sichuan Dark brick tea (Camellia sinensis) and Sichuan Fuzhuan brick tea using gas chromatography–mass spectrometry (GC–MS) and aroma descriptive profle tests
aroma active compounds Sichuan Dark brick tea Sichuan Fuzhuan brick tea GC–MS aroma descriptive profle tests
2024/7/31
Sichuan dark brick tea (Camellia sinensis) and Sichuan Fuzhuan brick tea have signifcantly diferent aroma characteristics although both of them have almost the same processing methods. Thus, these two...
Monitoring of Pesticides Residues in Italian Mineral Waters by Solid Phase Extraction and Gas Chromatography Mass Spectrometry
Mineral Water Pesticides SPE GC-MS
2013/3/19
Twenty-two pesticides and metabolites, selected on the basis of regional priority lists, were surveyed in thirty Italian mineral waters springs for three years by a procedure based on solid phase extr...
Preparation of flaxseed for lignan determination by gas chromatography–mass spectrometry method
defatting extraction GC/MS hydrolysis lignans
2014/2/25
Since 1980s, several methods for the determination of lignans in food samples have been developed depending on the types of lignans and foods analysed, but mostly on flaxseed as a reference food. In t...
Trace Analysis of Polycyclic Aromatic Hydrocarbons Using Gas Chromatography–Mass Spectrometry Based on Nanosecond Multiphoton Ionization
Trace Analysis Polycyclic Aromatic Hydrocarbons Gas Chromatography–Mass Spectrometry Based Nanosecond Multiphoton Ionization
2010/9/15
Gas chromatography/resonance-enhanced multiphoton ionization/time-of-flight mass spectrometry (GC/REMPI-TOFMS) using an ultraviolet nanosecond laser was employed in the trace analysis of polycyclic ar...
Simultaneous Determination of Estradiol Valerate and Medroxyprogesterone Acetate in a Tablet Formulation by Gas Chromatography–Mass Spectrometry
Estradiol Valerate Medroxyprogesterone Acetate Gas Chromatography–Mass Spectrometry
2010/9/19
A new and simple gas chromatography–mass spectrometry (GC-MS) method has been developed for simultaneous determination of estradiol valerate (EV) and medroxyprogesterone acetate (MPA) in a tablet form...
Determination of Reductones, Furans and Organic Acids in Aqueous Model Matrices Using Solid-Phase Extraction and Gas Chromatography/Mass Spectrometry
reductone furan organic acid
2009/5/31
A method using solid-phase extraction (SPE) and GC-MS was developed for the determination of a series of polar and unstable flavor compounds: reductones, furans and volatile organic acids, in aqueous ...
Rapid Method for the Determination of 180 Pesticide Residues in Foods by Gas Chromatography/Mass Spectrometry and Flame Photometric Detection
pesticide residue analysis multiresidue graphitized carbon black / primary secondary amine
2009/3/5
A method was established for the determination of 180 pesticide residues in fruits and vegetables. The procedure involved extraction with acetonitrile, followed by a salting-out step with anhydrous ...
LEVELS OF BACTERIAL ENDOTOXIN IN AIR OF ANIMAL HOUSES DETERMINED WITH THE USE OF GAS CHROMATOGRAPHY – MASS SPECTROMETRY AND LIMULUS TEST
endotoxin organic dust air animal houses gas chromatography
2010/12/23
Air samples were collected on glass fi bre fi lters in 22 animal houses and 3 hay storage barns and examined for the presence of bacterial endotoxin with the Limulus (LAL) test and the gas chromatogra...
Determination of vinyl chloride monomer in food contact materials by solid phase microextraction coupled with gas chromatography/mass spectrometry
migration solid phase microextraction (SPME) vinyl chloride monomer
2014/3/19
The present study concerns the optimisation of the headspace solid phase microextraction (HS/SPME) combined with gas chromatography/mass spectrometry (GC/MS) for the vinyl chloride monomer determinati...
Determination of bisphenol A, bisphenol F, bisphenol A diglycidyl ether and bisphenol F diglycidyl ether migrated from food cans using Gas Chromatography-Mass Spectrometry
bisphenol A bisphenol F bisphenol A diglycidyl ether bisphenol F diglycidyl ether migration gas chromatography mass spectrometry
2014/3/19
Varnishes used for the inner coatings of food cans are mostly based on epoxy resins or vinylic organosols. The epoxy resins are produced from bisphenol A and bisphenol F and they also contain BADGE or...