《Table 13 Results of recovery test》
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《Extraction Process and Content Determination of Total Flavonoids in Ginkgo( Ginkgo biloba L. ) Leaves》
Recovery(%)=(Measured value-Total flavonoid content)/(Addition amount of quercetin×97.4%)×100%
At first,1.00 ml of the test solution was accurately pipetted into a 10 ml volumetric flask,and added with methanol to constant volume,followed by shaking uniformly.The absorbance at the maximum absorption wavelength of 259.5 nm was measured at 0,1,2,4,8,24 and 48 h,respectively.The total flavonoid contents were calculated,and the RSD was 1.0%within 8 h and 3.4%within 48 h.It indicated that the test solution was stable within 8 h,but unstable within 48 h.Therefore,the test solution could not be stood for a long time,and it is best to measure within 8 h.The results are shown in Table 12.
图表编号 | XD0028004700 严禁用于非法目的 |
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绘制时间 | 2019.02.01 |
作者 | Dengfeng ZOU、Hua ZHU、Binghua QIN、Xiaohua WANG |
绘制单位 | Guilin Medical University、Guilin Medical University、Guilin Medical University、Guilin Medical University |
更多格式 | 高清、无水印(增值服务) |