Linked Life Data

16806245

Source:http://linkedlifedata.com/resource/pubmed/id/16806245

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1-2
pubmed:dateCreated
2006-8-28
pubmed:abstractText
The synthesis and determination of persistent dicarboxylic metabolites of alkylphenol polyethoxylates (NPEOs), carboxyalkyl phenoxy ethoxy carboxylates (CAPECs), are investigated. The synthesized CAPECs have three and four carbon atoms and a carboxyl group in the alkyl chain side, and a carboxymethoxy acid group in its para-position (expressed as CA(3)P1EC and CA(4)P1EC in their abbreviation). The synthesis was successfully accomplished via a four-step reaction sequence that started from 4-fluoroanisole. After propylation by a propanol/acetyl chloride procedure, the derivatives of synthesized CA(3)P1EC and CA(4)P1EC were separated and identified by GC-MS with electron impact ionization (EI). The most abundant characteristic ions were produced by benzylic cleavages of carboxyalkyl chain to yield [M-87](+), corresponding to ions of m/z 235 for CA(3)P1EC and m/z 249 for CA(4)P1EC. Recoveries of synthesized CA(3)P1EC and CA(4)P1EC in various spiked water samples ranged from 82 to 92% with relative standard deviations (RSD) lesser than 7%. The limits of quantitation (LOQ) of CA(3)P1EC and CA(4)P1EC were estimated to be 0.005 and 0.01 microg/l in 100ml of water samples, respectively. The concentrations of CA(4)P1EC residues were detected in the aquatic environment ranging from n.d. to 3.24 microg/l. The results show that the synthesized CA(4)P1EC has been successfully applied to more accurately determine the concentrations of CA(4)P1EC residues in water samples.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Sep
pubmed:issn
0021-9673
pubmed:author
pubmed:issnType
Print
pubmed:day
15
pubmed:volume
1127
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
246-53
pubmed:dateRevised
2009-1-15
pubmed:meshHeading
pubmed:year
2006
pubmed:articleTitle
Synthesis and determination of dicarboxylic degradation products of nonylphenol polyethoxylates by gas chromatography-mass spectrometry.
pubmed:affiliation
Department of Chemistry, National Central University, Chung-Li 32054, Taiwan.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't