是没有保留还是怎么回事？
可以试试如下色谱柱和分析条件：
parsetable('', '', '[tr][td]
Column[/td][td]Cogent Bidentate C8™, 4µm, 100A[/td][/tr][tr][td]
Catalog No.[/td][td]40008-15P[/td][/tr][tr][td]
Dimensions[/td][td]4.6 x 150mm[/td][/tr][tr][td]
Mobile Phase[/td][td]40% Acetonitrile, 60% 10mM Phosphate Buffer, pH 7.5[/td][/tr][tr][td]
Flow rate[/td][td]1.0 mL/minute[/td][/tr][tr][td]
Peaks[/td][td]Clindamycin[/td][/tr][tr][td]
Injection Volume [/td][td]20 µL[/td][/tr][tr][td]
Detection[/td][td]UV 338 nm[/td][/tr][tr][td]
Temperature[/td][td]25°C[/td][/tr]')
This semi-synthetic antiobiotic is structurally related to lincomycin and the chromatogram shown of clindamycin is from a complex pharmaceutical formulation. Note the excellent peak shape and the selectivity from the excipients. The stability and robustness of the Cogent TYPE-C™ columns makes this an excellent choice for QC applications.
