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山药中尿囊素的高效液相色谱分析方法研究 总被引:8,自引:1,他引:8
建立了山药中尿囊素的高效液相色谱分析方法。样品用甲醇-水(90:10,V/V)提取,在氨基柱上进行高效液相色谱分析,紫外检测波长224nm,流动相为甲醇-水(80:20,V/V),相对标准偏差为2.0%(n=5),尿囊素的回收率为98.8%(n=4)。 相似文献
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The research of the effects of surfactants on coloring reaction between titanium and phenyl fluorone was developed.A survey of coexisting elements in the houttuynia cordata thunb was carried out by X-ray fluorescence spectrometry,and a series of interference tests and analyses were performed.The interference can be eliminated by processing through high temperature cineration and adding ascorbic acid.A new method of determination of titanium in houttuynia cordata thunb was established by phenyl fluorone spectrophotometry in the presence of Emulsifier OP.The results showed that Beer's law is obeyed within the range of 0~0.32 μg·mL-1 for titanium.The relative standard deviation(RSD) was 1.9%~2.0%,and the recovery was 96.8%~100.6%.The method was applied for determination of titanium in houttuynia cordata thunb with satisfactory results. 相似文献
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ICP-AES法测定猫爪草中常量及微量元素 总被引:12,自引:3,他引:12
运用ICP—AES法对河南、新疆产猫爪草中常量及微量元素进行了测定。结果表明猫爪草含K,Fe,Ca,Cr,Mg,Mn,Zn,Co,Cu,Ni,Se,Sr等多种常量及微量元素,微量元素Pb,Cd,As等的含量甚微;研究发现猫爪草块根中Zn/Cu值为3左右,与抗癌中药中微量元素的含量有Zn高Cu低的现象一致。 相似文献
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用工作波长632.8 nm、功率为2.5 mW的He-Ne激光器辐照铁棍山药,30 min后,其芦头芽萌发受抑,山药茎含水量、可溶性总糖和可溶性蛋白含量分别从70.203 9%下降到66.615 4 4%、从72.213 25 mg·g-1下降到25.878 88 mg·g-1、从508.539 4 μg·g-1下降到258.423 1 μg·g-1,丙二醛(MDA)和超氧阴离子含量分别从0.62 mmol·g-1变为8.033 122 mmol·g-1、从32.997 13 μg·g-1变为35.536 42 μg·g-1,贮藏前期的超氧化物歧化酶(SOD)活性从494.864 U·g-1变为1 105.85 U·g-1,贮藏后期的SOD活性从1 105.85 U·g-1变为959.167 U·g-1. 相似文献
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采用超声波提取法提取中药何首乌中磷脂类化合物,探讨了提取溶剂用量、提取时间及超声功率等因素对磷脂提取率的影响,结合ICP-AES分析法对提取的磷脂类化合物进行了测定.结果表明,对于1.5 g何首乌,用20 mL Folch试剂,超声提取35 min,超声功率为24 kHz的条件下磷脂提取率较高. 相似文献
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A simple HPLC method was developed for determination of quercitrin and isoquercitrin in rat plasma. Reversed-phase HPLC was employed for the quantitative analysis using kaempferol-3-O-beta-D-glucopyranoside-7-O-alpha-L-rhamnoside as an internal standard. Following extraction from the plasma samples with ethyl acetate-isopropanol (95:5, v/v), these two compounds were successfully separated on a Luna C(18) column (250 x 4.6 mm, 5 microm) with isocratic elution of acetonitrile-0.5% aqueous acetic acid (17:83, v/v) as the mobile phase. The flow-rate was set at 1 mL/min and the eluent was detected at 350 nm for both quercitrin and isoquercitrin. The method was linear over the studied ranges of 50-6000 and 50-5000 ng/mL for quercitrin and isoquercitrin, respectively. The intra- and inter-day precisions of the analysis were better than 13.1 and 13.2%, respectively. The lower limits of quantitation for quercitrin and isoquercitrin in plasma were both of 50 ng/mL. The mean extraction recoveries were 73 and 61% for quercitrin and isoquercitrin, respectively. The validated method was successfully applied to pharmacokinetic studies of the two analytes in rat plasma after the oral administration of Hypericum japonicum thunb. ethanol extract. 相似文献