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高效液相色谱法测定蛹虫草中腺苷和虫草素 总被引:8,自引:0,他引:8
在蛹虫草中腺苷和虫草素含量的反相高效液相色谱分析中,所用色谱柱为WatersNOVA-PAK C18(3.9 mm×300 mm,4μm),流动相为0.01 mol.L-1KH2PO4-K2HPO4缓冲溶液(pH 6.86)+1%(体积分数)四氢呋喃,流速为1.0 mL.min-1。紫外检测的波长为260 nm,峰面积与腺苷浓度和虫草素浓度之间的线性范围依次为1.27~50.5 mg.L-1和3.23~129.0 mg.L-1,其检出限依次为0.18 ng和0.25 ng。在腺苷及虫草素的浓度水平依次为5.05 mg.L-1和12.9 mg.L-1时测试方法的精密度,求算得RSD(n=7)值依次为0.094%和0.792%。用标准加入法试验方法的回收率,求得两者的平均回收率依次为103.2%和98.5%。 相似文献
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提出了用基质固相分散-高效液相色谱法测定虫草中甘露醇.将虫草样品与石墨化碳黑球以质量比为1比4充分研磨后装柱,用热水洗脱,洗脱液中的甘露醇用高效液相色谱法测定.以Waters Sugar-Pak 1钙型阳离子交换柱为固定相,水为流动相,蒸发光散射检测器检测.方法的检出限(3S/N)为0.15 rag·L-1.方法应用于虫草样品的分析,测得相对标准偏差(n=7)均小于1.5%;在实样基础上作加标回收试验,测得回收率在97%~103%之间. 相似文献
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取泰山虫草样品2.50g,加入7.5mL水和含0.1%(体积分数)乙酸的乙腈混合溶液10mL,涡旋振荡1min,再加入无水硫酸镁4.0g和氯化钠1.0g,离心,取上清液1.0 mL于含150mg无水硫酸镁、50mg N-丙基乙二胺、50mg C18填料、12mg石墨化碳黑的2mL分散固相萃取管中,涡旋振荡30s,取上清液经过0.22μm有机滤膜进行过滤,采用高效液相色谱法测定其中4种黄曲霉毒素的含量。结果表明:4种黄曲霉毒素的质量浓度在一定范围内与其峰面积之间呈线性关系,检出限(3S/N)在0.06~0.20μg·kg-1之间。按照标准加入法进行加标回收试验,测得回收率在92.4%~102%之间,测定值的相对标准偏差(n=6)在2.7%~3.5%之间。 相似文献
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建立了同时测定化妆品中10种美白活性成分及2种禁用成分的高效液相色谱分析方法。水基、乳液等含油脂较少的样品采用0.02 mol/L磷酸二氢钾溶液(pH 6.0)直接提取;油脂含量高的样品及蜡基、粉基类的样品先加入2.5 m L二氯甲烷溶解后再用0.02 mol/L磷酸二氢钾溶液(pH 6.0)提取。提取液在9 500r/min下离心后用0.22μm滤膜过滤。样品采用Eclipse XDB-C_(18)色谱柱为固定相,以0.02 mol/L磷酸二氢钾溶液(pH 6.0)和甲醇溶液为流动相,梯度洗脱,流速为1.0 m L/min,柱温为25℃,使用二极管阵列检测器(DAD)进行检测,检测波长为230 nm和250 nm,外标法定量。结果显示:12种化合物在2.5~100 mg/L范围内线性关系良好,相关系数(r)均大于0.999 0。方法的定量下限(以信噪比为10计)为0.006 5%~0.025%,添加水平为0.025%~0.5%时回收率为87%~102%,相对标准偏差均小于4%。该方法前处理简单、回收率高、精密度好,适用于化妆品中10种美白活性成分及2种禁用成分的快速测定。 相似文献
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LC/ESI-MS分离和测定冬虫夏草及其代用品的有效成分 总被引:4,自引:0,他引:4
本文报道采用电喷雾离子化(ESI),用高效液相色谱质谱联用法同时分离和测定冬虫夏草及其代用品中主要活性成分尿苷和腺苷的方法。本法使用Shimadzu VP ODS色谱柱,以水甲醇甲酸(90∶9.0∶1.0,V/V)为流动相,2 氯腺苷为内标,选择性离子检测(SIM)模式作定量分析。结果表明:尿苷和腺苷线性范围分别为2.0~110.0μg·mL-1和1.0~120.0μg·mL-1,检出限分别为0.3μg·mL-1和0.2μg·mL-1,标准加入回收率为97.0%~103.3%。该法已成功地用于冬虫夏草及其代用品中尿苷和腺苷的分析。 相似文献
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HELP法在中草药分析中的应用研究-冬虫夏草的化学成分测定 总被引:4,自引:0,他引:4
基于直观推导式演进特征投影(HELP)法,对冬虫夏草子座和虫体分别进行了多组分同时定性定量测定.结果表明,HELP法能减少样本提取分离的步骤,降低色谱分离条件的要求,提高检测准确度.联用色谱检测与化学计量学解析法相结合将为复杂中草药分析提供一种全新手段 相似文献
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Simple HPLC-UV determination of nucleosides and its application to the authentication of Cordyceps and its allies 总被引:1,自引:0,他引:1
A simple HPLC-UV method combined with a simple extraction procedure of nucleosides (adenosine, cordycepin, 2'-deoxyadenosine, guanosine and uridine) was developed and applied to the authentication of Cordyceps and its allies. The separation was performed on a C(18) column by isocratic elution with acetonitrile-water, and UV detection at 260 nm. The amounts of adenosine, cordycepin, 2'-deoxyadenosine, guanosine and uridine in Cordyceps were 0.28-14.15, 0.006-6.36, 0.01-0.14, 0.68-14.79 and 0.19-20.29 mg/g, respectively. Among the nucleosides studied, cordycepin was characteristically included in Cordyceps militaris (L.) Link. (CM), which is one of key Cordyceps allies, and might be a good marker for authenticating CM. The ratio of nucleosides to adenosine contents in Cordyceps seemed to be a useful marker for authentication and quality control of Cordyceps. 相似文献
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A water-soluble polysaccharide(named MCMP) was isolated from the mycelium with high yield mutation Cordyceps militaris by hot-water extraction, deproteinization by sevage, alcohol precipitation, anion-exchange and gel filtration chromatography CL-6B. The polysaccharide contained mannose, rhamnose, galactose and glucose in a molar ratio of 59.36:1:8.31:39.50, of which the average molecular weight is 8100. In our research, Hep-G2 cells, Hela cells and mesangial cells were chosen to determine the anti-tumor activity of the polysaccharide. The results of MTT assay show that polysaccharides of the mutant strain presented inhibitory activity on the cells proliferation after 48 h incubation. 相似文献
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采取超高压提取,DEAE-Sepharose Fast Flow和Sephadex G-100柱层析分离纯化得到虫草多糖(CMP),通过高效凝胶色谱(HPGPC)、气相色谱(GC)和傅里叶红外光谱(FT-IR)对其理化特征进行了表征,并对CMP抗氧化及免疫调节活性进行了测定.结果显示CMP是纯度较高杂多糖,由鼠李糖、甘露糖、葡萄糖和半乳糖4个单糖组成,结果表明超高压是一种高效的菌多糖提取技术,提取得到的CMP可以探索作为天然的抗氧化和免疫调节剂应用于功能食品和药品. 相似文献
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《Biomedical chromatography : BMC》2018,32(9)
A systematic study on the metabolome differences between wild Ophiocordyceps sinensis and artificial cultured Cordyceps militaris was conducted using liquid chromatography−mass spectrometry. Principal component analysis and orthogonal projection on latent structure‐discriminant analysis results showed that C. militaris grown on solid rice medium (R‐CM) and C. militaris grown on tussah pupa (T‐CM) evidently separated and individually separated from wild O. sinensis, indicating metabolome difference among wild O. sinensis, R‐CM and T‐CM. The metabolome differences between R‐CM and T‐CM indicated that C. militaris could accommodate to culture medium by differential metabolic regulation. Hierarchical clustering analysis was further performed to cluster the differential metabolites and samples based on their metabolic similarity. The higher content of amino acids (pyroglutamic acid, glutamic acid, histidine, phenylalanine and arginine), unsaturated fatty acid (linolenic acid and linoleic acid), peptides, mannitol, adenosine and succinoadenosine in O. sinensis make it as an excellent choice as a traditional Chinese medicine for invigoration or nutritional supplementation. Similar compositions with O. sinensis and easy cultivation make artificially cultured C. militaris a possible alternative to O. sinensis. 相似文献
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用人工神经网络-近红外光谱法测定冬虫夏草中的甘露醇 总被引:15,自引:0,他引:15
提出了用近红外漫反射光谱技术快速分析发酵冬虫夏草菌粉中甘露醇含量的新方法。采用比色法测定样品中的甘露醇,其含量范围为8.082%-14.548%。在7501.7-6097.8cm^-1与5453.7-4246.5cm^-1波段,分别采用PCR、PLSR和BP神经网络方法建立了样品近红外光谱的一阶微分光谱与其甘露醇含量之间的相关模型。BP神经网络模型的内部交叉验证误差均方根为0.475,预测误差均方根为0.608,均优于PCR和PLSR的处理结果。这表明,BP神经网络法对非线性检测对象具有较好的建模效果,可用于中药近红外光谱分析的非线性校正。 相似文献