Search results for "mercaptans"

showing 2 items of 2 documents

More about sampling and estimation of mercaptans in air samples

2013

[EN] Several strategies have been developed for sampling and determination of volatile thiols. The selectivity and sensitivity of the proposed methodologies are achieved by using a specific derivatizing reagent. The different procedures assayed are based on air sampling followed by derivatization of the analytes with OPA and isoleucine in alkaline solution. The derivatization products are separated and determined by liquid chromatography and fluorescence detection. To start, the derivatization conditions and stability of the derivates have been studied in order to establish the storage conditions. In general, the strategies studied consisted on trapping and detivatization the thiol compound…

AnalyteSorbentAir samplesAlkaliesHigh-performance liquid chromatographyAnalytical ChemistryCartridgeO-Phthalaldehydechemistry.chemical_compoundMercaptansQUIMICA ANALITICAHumansSulfhydryl CompoundsIsoleucineDerivatizationAir sampling systemFluorescent DyesAir PollutantsChromatographyAirSampling (statistics)DerivatizationSolutionsSpectrometry FluorescencechemistryReagentCalibrationHPLCo-PhthalaldehydeChromatography Liquid
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Contribution à l'étude des « goûts de lumière » dans le vin de champagne *. 1. Aspects analytiques - Dosage des mercaptans et des thiols dans les vins

1977

<p style="text-align: justify;">Plusieurs accidents appelés « goûts de lumière » ou « goûts de réduit » ont été observés dans les vins de champagne au cours de ces dernières années. Dans ce travail, nous avons mis au point une méthode d'appréciation de ces goûts par dosage des groupements thiols ou mercaptans dans les vins. L'analyse comparative montre une bonne concordance entre la concentration en groupements thiols et l'appréciation gustative.</p><p style="text-align: justify;">+++</p><p style="text-align: justify;">For some years, accidents called « light tastes » or « reduced tastes » have been occured in Champagne wines; a method for thiols and mercaptans…

Champagne winemedia_common.quotation_subjectmercaptanslcsh:SArtHorticulturelcsh:QK1-989reduced tastelcsh:Agriculturelcsh:Botanylight tastewineHumanitiesthiolsFood Sciencemedia_commonOENO One
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