ABSTRACT
Objective:To establish the methods for the qualitative identification and content determination of aurantio-obtusin and chrysophanol in Zeju Jiangzhi tablets. Methods:A TLC method was adopted for the qualitative identification, and an HPLC method was used for the content determination. The determination was performed on a Wondasil C18 (250 mm × 4. 6 mm, 5 μm ) column with the mobile phase of acetonitrile -0. 1% phosphonic acid with gradient elution at the flow rate of 1. 0 ml?min-1 , the detection wave-length was 286 nm, the column temperature was 30℃ and the injection volume was 10μl. Results:The TLC spots of aurantio-obtusin and chrysophanol were clear and well-separated without any negative interference. The HPLC experiment results showed the good line-arity within the range of 1. 03-25. 72μg?ml-1(r=0. 999 9) for aurantio-obtusin, and 0. 48-11. 92μg?ml-1(r=0. 999 9) for chry-sophanol. The average recovery was 99. 21% and 98. 85%, and RSD was 0. 70% and 0. 73%, respectively (n=9). Conclusion:The method is simple, accurate and repeatable, which can be used for the qualitative identification and content determination of auran-tio-obtusin and chrysophanol in Zeju Jiangzhi tablets.
ABSTRACT
Objective To establish a sterility test of levofloxacin lactate and sodium chloride injection .Methods The test was carried out by thin-membrane filtration method with different volume of flushing liquid or adding neutralization into culture medium according to the Appendix of Chinese Pharmacopoeia (2010 edition) .Results When 0 .1% peptone water was used as flushing liquid ,Staphylococcus aureus gave no evidence of growth until the amount of flushing liquid reached 700 ml per tube (100 ml each time) .At the same time ,all of the six positive control bacteria grew normally when there was 300 ml flushing liquid in each tube with neutralization as culture medium .Conclusion This method was simple and convenient ,suggesting that it was suitable for the sterility test of levofloxacin lactate and sodium chloride injection .