TY - RPRT TI - Study on conical columns with different conical angles for semi-preparative liquid chromatography. AU - Jiping Ma AU - Lingxin Chen AU - Yafeng Guan PY - 2004 DO - 10.1016/j.chroma.2004.01.066 UR - https://pubmed.ncbi.nlm.nih.gov/15088748/ ID - 15088748 ER -