HPLC法测定益母草中的5个己糖二酸和1个丁糖二酸类化合物

目的:建立测定益母草中5个己糖二酸和1个丁糖二酸类化合物含量的高效液相色谱法。方法:色谱条件为Agilent Poroshell 120 EC-C_(18)色谱柱(100 mm×4.6 mm,2.7μm),以0.1%甲酸水溶液-乙腈为流动相,梯度洗脱,柱温30℃,检测波长280 nm,流速0.8 mL·min^(-1)。结果:2-丁香酰基己糖二酸、2-阿魏酰基己糖二酸、2,4-二丁香酰基己糖二酸、3,4-二丁香酰基己糖二酸、2-丁香酰基苹果酸和2-阿魏酰基-4-丁香酰基己糖二酸等6个成分在各自的线性范围内线性关系良好(r≥0.9998),平均加样回收率为95.4%~100.1%,回收率的RSD≤3.9%,在30批不同产地的益母草药材中的平均含量为0.0278%~0.2353%,总含量为0.5248%~1.459%。结论:己糖二酸类成分是益母草中不容忽视的大类化学成分。

Alkylpolyglycoside inducing poly (butylene terephthalate) non-woven graft copolymerization of chitosan

In order to improve the wettability and biocompatibility of the poly （butylene terephthalate） non-woven （PBTNW）, the method of surface modification is used to graft copolymerization of chitosan （CS） onto the PBTNW under alkylpolyglycoside （APG） inducing. The product is thoroughly characterized with the Fourier transform infrared spectroscopy （FrIR）, the electron spectroscopy for chemical analysis （ESCA）, the thermogravimetric （TG） and the scanning electron microscopy （SEM）. It is found that chitosan is successfully grafted onto PBTNW. In addition, the water contact angles, hemolysis tests and cytotoxicity evaluation tests show an improvement in wettability and biocompatihility as a result of graft copolymerization of chitosan. So the CS-grafted PBTNW exhibits greater superiority than the original PBTNW. The CS-grafted PBTNW can be a candidate for blood filter materials and other medical applications.