Research on common laws during membrane enrichment of six herbal volatile oils--physicochemical property and fingerprint similarity / 中国中药杂志

ABSTRACT

Membrane enrichment process of Chinese medicine volatile oil is green, practical and has a good application prospects. Schizonepetae Herba et al. six chinese medicine oily water were filtrated with polyvinylidene fluoride (PVDF) membrane with MWCO 70 000, at 40 degrees C, 0.1 MPa and 150 r x min(-1), common laws of physicochemical property of six oily water and fingerprint similarity between original and preserved oil were studied during membrane enrichment. Results were as follows pH was gradually reduced to the minimum; conductivity firstly became larger, then smaller until 0; viscosity gradually increased to a maximum; surface tension gradually decreased to a minimum; turbidity firstly gradually increased, then reduced to a minimum; density gradually decreased to a minimum, but the change trend was opposite for Acori Tatarinowii Rhizoma with heavy oil; salinity was 0. In the end, pH reached a maximum and density reached a maximum (contrary for Acori Tatarinowii Rhizoma) and the other physicochemical property values reached a minimum for the last permeate. Fingerprint similarity between original and enriched volatile oil was above 90%. The above results provided data support and theoretical basis for the industrialization of membrane enrichment volatile oil technology.