Linked Life Data

11318405

Source:http://linkedlifedata.com/resource/pubmed/id/11318405

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
2001-4-24
pubmed:abstractText
During the development of the liquid chromatography with electrospray ionization-tandem mass spectrometry for the quantitative determination of 3'-C-ethynylcytidine (I) in rat plasma, ion suppression caused by the matrix components was observed for I and its structural analogue, 3'-C-ethylcytidine (II) as the internal standard. In the method initially designed, I/II peak area ratios varied according to the degree of matrix effect, which led to the poor precision of the assay. From the examination of the ion suppression behavior for I and II, it was assumed that this phenomenon is attributed to the difference in the retention time between I and II. Based on this assumption, therefore, the methanol content in the mobile phase was changed from 5 to 25% so as to make I and II the same retention time. As a result of this modification of the initial method, the precision expressed as relative standard deviation was improved from 5.2-16.2 to 2.7-4.2% in intra-assay and from 6.8-14.9 to 3.5-7.2% in inter-assay validations.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Apr
pubmed:issn
1387-2273
pubmed:author
pubmed:issnType
Print
pubmed:day
15
pubmed:volume
754
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
113-9
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
2001
pubmed:articleTitle
Improvement in precision of the liquid chromatographic-electrospray ionization tandem mass spectrometric analysis of 3'-C-ethynylcytidine in rat plasma.
pubmed:affiliation
Pharmacokinetics Research Laboratory, Taiho Pharmaceutical Co., Ltd., Tokushima, Japan. r-kitamura@taiho.co.jp
pubmed:publicationType
Journal Article, Comparative Study