Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/34094
DC FieldValueLanguage
dc.contributor.authorLee, M.R.en_US
dc.contributor.author李茂榮zh_TW
dc.contributor.authorLee, R.J.en_US
dc.contributor.authorLin, Y.W.en_US
dc.contributor.authorChen, C.M.en_US
dc.contributor.authorHwang, B.H.en_US
dc.date1998zh_TW
dc.date.accessioned2014-06-06T07:47:09Z-
dc.date.available2014-06-06T07:47:09Z-
dc.identifier.issn0003-2700zh_TW
dc.identifier.urihttp://hdl.handle.net/11455/34094-
dc.description.abstractThis study analyzes acidic herbicides from an aqueous sample by developing a methylated postderivatization on the fiber following solid-phase microextration (SPME) with diazomethane gas procedure combined with GC/MS. Analysis results indicate that a silica fiber coated with polyacrylate (PA) yields a higher extraction efficiency than that obtained with poly(dimethylsiloxane) (PDMS) using the SPME technique. Detection limits are achieved at the level of 10-30 ng/L, Linearity is obtained over a wide range, with precision below 12% RSD. In addition, the significant reduction in extraction efficiency is attributed to the concentration of humic acids exceeding 5 mg/L. Various degradation compounds of acidic herbicides in basic solution are also detected, including 2,4-dichlorophenol, 2,4,5-trichlorophenol, 4-chloro-3-methylphenol, pentachlorinated biphenyl, and tetrachlorinated biphenyl. Moreover, the amount of pentachlorinated biphenyl and tetrachlorinated biphenyl increases over time.en_US
dc.language.isoen_USzh_TW
dc.relationAnalytical Chemistryen_US
dc.relation.ispartofseriesAnalytical Chemistry, Volume 70, Issue 9, Page(s) 1963-1968.en_US
dc.relation.urihttp://dx.doi.org/10.1021/ac971153gen_US
dc.subjectliquid-chromatographyen_US
dc.subjectmass-spectrometryen_US
dc.subjectextractionen_US
dc.subjectderivatizationen_US
dc.subjectpesticidesen_US
dc.subjectdetectoren_US
dc.subjectsoilen_US
dc.titleGas-phase postderivatization following solid-phase microextraction for determining acidic herbicides in wateren_US
dc.typeJournal Articlezh_TW
dc.identifier.doi10.1021/ac971153gzh_TW
item.cerifentitytypePublications-
item.grantfulltextnone-
item.languageiso639-1en_US-
item.fulltextno fulltext-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.openairetypeJournal Article-
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