Use of cation exchange chromatography for human C-peptide isotope dilution - mass spectrometric assay.
Use of cation exchange chromatography for human C-peptide isotope dilution - mass spectrometric assay.
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DOI:
10.1016/j.chroma.2011.10.080
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发表时间:
2011-12-23
期刊:
影响因子:
--
通讯作者:
Little RR
中科院分区:
文献类型:
--
作者:
Stoyanov AV;Rohlfing CL;Connolly S;Roberts ML;Nauser CL;Little RR
An application of ion exchange chromatography for C-peptide analysis is described here. At the stage of C-peptide isolation, a strong cation exchanger (SP HP or MonoS) was used to purify the analyte from ballast proteins and peptides. The conditions of ion-exchange chromatographic separations were optimized using theoretical modeling of the net surface electric charge of the peptide as a function of pH. The purified and concentrated sample was further subjected to LC-MS/MS. In order to improve the reliability of analysis, two fragment ions were monitored simultaneously both for native C-peptide and internal standard, isotopically labeled C-peptides analogues (fragments with m/z of 927.7 and 147.2). Using ion-exchange chromatography, it became possible to process larger sample volumes, important for testing patients with very low C peptide levels, compared to currently used solid phase extraction methods.
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影响因子:
7.7
作者:
KUZUYA, H;BLIX, PM;BINDER, C
通讯作者:
BINDER, C
影响因子:
9.3
作者:
Rogatsky, E;Balent, B;Stein, DT
通讯作者:
Stein, DT
DOI:
10.1016/s1570-0232(03)00268-x
发表时间:
2003-07-25
影响因子:
3
作者:
Fierens, C;Stöckl, D;Thienpont, LM
通讯作者:
Thienpont, LM
影响因子:
4.1
作者:
Stoyanov, AV;Righetti, PG
通讯作者:
Righetti, PG
影响因子:
2.9
作者:
CASTAGNOLA, M;MESSANA, I;GIARDINA, B
通讯作者:
GIARDINA, B