Linked Life Data

16224959

Source:http://linkedlifedata.com/resource/pubmed/id/16224959

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
14
pubmed:dateCreated
2005-10-17
pubmed:abstractText
Turbulent flow chromatography (TFC) is presented as a means to reduce ion suppression in simultaneous multianalyte mass spectrometric bioassays. In this study, the effects of enzymes present in the sample on the signal response of five analytes were simultaneously investigated over a protein content range from 0 to 38 microg/mL by means of direct flow injection MS. As model enzymes, trypsin, thrombin, and chymotrypsin were selected. Without employment of TFC, both signal suppression and signal enhancement, depending on the nature of the analyte and the amount of matrix in the sample, were observed. Generally, these matrix effects were found to be intolerably large. The deviation from the mean signal response as a measure of deterioration was found to be between 14 and 112%. The addition of an excess of methanol as means of sample clean-up was investigated and found not to be sufficient. By employing TFC for online sample preparation, it was possible to reduce the matrix effecTs to a minimum for all model systems investigated. In case of trypsin the distortion could be lowered from 41.9 to 2.6%. Thus, TFC is considered to be a highly valuable tool for improving the sensitivity and reliability in the monitoring of enzymatic conversions by means of MS.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Sep
pubmed:issn
1615-9306
pubmed:author
pubmed:issnType
Print
pubmed:volume
28
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1658-65
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
2005
pubmed:articleTitle
Turbulent flow chromatography for the reduction of matrix effects in electrospray ionization mass spectrometry-based enzyme assays.
pubmed:affiliation
Chemical Analysis Group and MESA Research Institute, University of Twente, Enschede, The Netherlands.
pubmed:publicationType
Journal Article