The invention relates to a SPE-
HPLC method for determining a content of
phellodendrine in Leshu washing
lotion. The method comprises the following steps of: A, preparing aliquid of a reference substance; B, preparing aliquid of a
test sample: preparing the liquidof the
test sample by adopting a
solid phase extraction method; C, performing the liquid chromatographic detection; D, establishing a
standard curve; and E, determining a sample. The testedliquid is prepared by selecting the
solid phase extraction method, the extraction
recovery rate about 100 percent can be obtained,
inorganic salts and organic impurities in a
test sample can be effectively removed, and the service life of a
chromatographic column can be prolonged. The
solid phase extraction method can process the sample in batches and is easy in
automation, so that the working efficiency can be improved. A majority of methods reported by the existing literatures adopt a C18
chromatographic column, and the
present method selects an amino column as an analysis column, so thatcompared with the C18
chromatographic column, the amino column has the advantages of high column efficiency, sharp peak pattern and little interference. The method is simple in operation, accurate in result, good in
repeatability and less in
impurity interference in the analysis process.