在通则<621>色谱法的系统适用性(SYSTEM SUITABILITY)项下有如下描述:
"Relative retention times may be provided in monographs for informational purposes only to aid in peak identification.There are no acceptance criteria applied to relative retention times."
即各论中提及的相对保留时间仅供参考,旨在辅助识别色谱峰,并没有关于相对保留时间的可接受标准"。