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RP-HPLC法同时分析僵蚕中槲皮素、山萘酚的含量 总被引:1,自引:0,他引:1
为建立僵蚕中槲皮素、山萘酚、木犀草素、芹菜素含量测定方法,试验采用反相高效液相色谱法,同时分析僵蚕中槲皮素、山萘酚的含量。试验结果表明:槲皮素、山萘酚、木犀草素、芹菜素回归曲线分别为Y=1504.412X+9.9756、Y=1991.745X+8.6051、Y=567.591X+2.5397、Y=1811.803X+0.3074,在5.5216×10-2~19.3256×10-2μg/ml、4.608×10-2~16.128×10-2μg/ml、12.5504×10-2~43.9264×10-2μg/ml、6.0288×10-2~21.1008×10-2μg/ml范围内线性关系良好,相关系数r为0.99992~0.99998。槲皮素、山萘酚的加样回收率分别为95.7%、96.9%,RSD分别为2.99%、1.89%。样品分别含槲皮素、山萘酚、木犀草素、芹菜素0.22、0.64、0、0mg/g。试验为僵蚕提供了分析黄酮化合物方法,该法简便可行,重复性好,数据及结果可靠。僵蚕中富含槲皮素、山萘酚,值得进一步研究。 相似文献
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高效液相色谱法测定饲料中喹乙醇含量 总被引:1,自引:0,他引:1
本文介绍用高效液相色谱法测定饲料中喹乙醇含量的方法,在waters spherisorb OD52色谱柱上进行分离测定,以甲醇/水15/85(V/V)作流动相,流速0.8ml/min,检测波长375nm,方法回收率98.47%,相对标准偏差0.55%。 相似文献
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为了完善大黄末的质量控制方法,对大黄末中没食子酸的薄层鉴别和含量测定方法分别进行了研究。采用薄层色谱法鉴别没食子酸以及高效液相色谱法测定其含量。选用Agilent Eclipse XDB-C18(250 mm×4.6 mm,5μm)为色谱柱,甲醇-0.05%磷酸溶液(5∶95)为流动相,流速1.0 m L/min,检测波长为271 nm。试验结果没食子酸在1.064~106.4μg/m L浓度范围内,线性关系良好(r=1.0000);平均回收率(n=6)为97.84%(RSD=0.61%)。薄层色谱斑点清晰,分离度好。本方法准确灵敏,可用于大黄末中没食子酸的质量控制。 相似文献
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试验旨在建立肿节风三清颗粒的鉴别和含量测定分析方法,以期为制剂的质量标准提供方法学依据。采用薄层色谱法(TLC)对肿节风三清颗粒中的肿节风、射干、甘草进行定性分析;采用高效液相色谱法(HPLC)对制剂中的异嗪皮啶和迷迭香酸进行含量测定。薄层色谱结果表明,肿节风三清颗粒中的肿节风、射干、甘草在与其对应的标准药材或标准品的相同位置有一致的荧光斑点,而阴性样品无特征荧光斑点。HPLC结果表明,异嗪皮啶在3.795~18.975 μg/mL范围内线性关系良好(R2=0.9995),迷迭香酸在6.035~30.175 μg/mL范围内线性关系良好(R2=0.9997);异嗪皮啶和迷迭香酸的平均回收率分别为99.13%和100.30%,RSD分别为1.98%和0.02%(n=6)。结果表明,建立的定性及定量分析方法可操作性强,结果准确可靠,可用于肿节风三清颗粒中肿节风、射干、甘草的鉴别和指标性成分异嗪皮啶和迷迭香酸的含量测定,为肿节风三清颗粒的质量标准提供了方法学依据。 相似文献
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实验建立了饲料中喹乙醇经过固相萃取净化后用高效液相色谱仪定量检测的方法。饲料经70%甲醇溶液提取、离心后,经中性氧化铝小柱净化后,过0.45μm滤膜上机定量测定。实验结果表明,喹乙醇浓度为0.1~100.0μg/ml时具有良好的线性关系,饲料中喹乙醇回收率范围均在80%~110%。与国家标准GB/T8381.7—2005《饲料中喹乙醇的测定:高效液相色谱法》相比,本方法的实验结果不仅完全符合国家标准的要求,增加的净化过程更能有效地保护高效液相色谱系统。 相似文献
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建立了苦参注射液中苦参碱含量的HPLC检测法。色谱柱为waters C18(4.6 mm×150 mm,5μm),0.02 mol/L乙酸铵缓冲溶液(含500μL/L三乙胺)-甲醇-乙腈(70∶10∶20)为流动相,检测波长210 nm,流速1 mL/min,柱温30℃,进样量20μL。苦参碱进样浓度在4.0~200.0μg/mL范围内与峰面积呈良好的线性关系(r=0.999 9);样品平均回收率为100.1%(n=9),RSD为1.1%。本方法简便、准确度高、重复性好,可用于苦参注射液中苦参碱的质量控制。 相似文献
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目的:建立麻黄药材中麻黄碱与伪麻黄碱的HPLC含量测定方法,并将其应用于不同产地和种属麻黄的测定。方法:采用Luna C18色谱柱(250 mm×4.6 mm,5μm),以乙腈-0.2%磷酸溶液(含0.05%三乙胺,4∶96,v/v)为流动相,流速1.0 mL/min,柱温30℃,检测波长210 nm。结果:麻黄碱和伪麻黄碱分别在0.04-0.51μg、0.07-0.97μg范围内线性关系良好;平均回收率分别为98.7%和99.2%,RSD分别为2.1%和1.65%。结论:本方法结果准确,操作简单,数据可靠,可用于麻黄药材中麻黄碱与伪麻黄碱的含量测定,同时也为麻黄药材的鉴别和质量评价提供了依据。 相似文献
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建立了普鲁卡因青霉素注射液鉴别和含量测定的HPLC方法。样品经HPLC分离后进行定性鉴别和含量测定。结果显示供试品溶液主峰的保留时间与对照品溶液主峰的保留时间一致,普鲁卡因的线性范围为0.432-0.648 mg/mL,青霉素的线性范围为0.64-0.96 mg/mL,普鲁卡因和青霉素的添加回收率分别为101.35%和100.11%。该方法结果准确度高、精密度好,可作为质量标准控制方法。 相似文献
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薄层色谱和液相色谱法鉴别中兽药散剂中掺加的磺胺喹噁啉钠 总被引:2,自引:3,他引:2
对磺胺喹噁啉钠采用硅胶GF254板为固定相,以正丁醇-浓氨水(15∶3)为展开剂,用薄层色谱鉴别中兽药散剂中磺胺喹噁啉钠分离较好,斑点显色清晰且无干扰,可用于中药散剂中非法添加物磺胺喹噁啉钠的快速筛选。采用C18柱为固定相,以甲醇-乙腈-水-冰乙酸(2∶2∶9∶0.2)为流动相,紫外检测波长为270 nm。液相色谱鉴别中药散剂中非法添加磺胺喹噁啉钠分离良好,无干扰峰,可用于中兽药散剂中非法添加物磺胺喹噁啉钠的鉴别。 相似文献
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Ju-Bin Kang Dong-Ju Park Murad-Ali Shah Phil-Ok Koh 《Journal of veterinary science (Suw?n-si, Korea)》2022,23(2)
BackgroundGlutamate is the main excitatory neurotransmitter. Excessive glutamate causes excitatory toxicity and increases intracellular calcium, leading to neuronal death. Parvalbumin is a calcium-binding protein that regulates calcium homeostasis. Quercetin is a polyphenol found in plant and has neuroprotective effects against neurodegenerative diseases.ObjectivesWe investigated whether quercetin regulates apoptosis by modulating parvalbumin expression in glutamate induced neuronal damage.MethodsGlutamate was treated in hippocampal-derived cell line, and quercetin or vehicle was treated 1 h before glutamate exposure. Cells were collected for experimental procedure 24 h after glutamate treatment and intracellular calcium concentration and parvalbumin expression were examined. Parvalbumin small interfering RNA (siRNA) transfection was performed to detect the relation between parvalbumin and apoptosis.ResultsGlutamate reduced cell viability and increased intracellular calcium concentration, while quercetin preserved calcium concentration and neuronal damage. Moreover, glutamate reduced parvalbumin expression and quercetin alleviated this reduction. Glutamate increased caspase-3 expression, and quercetin attenuated this increase in both parvalbumin siRNA transfected and non-transfected cells. The alleviative effect of quercetin was statistically significant in non-transfected cells. Moreover, glutamate decreased bcl-2 and increased bax expressions, while quercetin alleviated these changes. The alleviative effect of quercetin in bcl-2 family protein expression was more remarkable in non-transfected cells.ConclusionsThese results demonstrate that parvalbumin contributes to the maintainace of intracellular calcium concentration and the prevention of apoptosis, and quercetin modulates parvalbumin expression in glutamate-exposed cells. Thus, these findings suggest that quercetin performs neuroprotective function against glutamate toxicity by regulating parvalbumin expression. 相似文献
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Jung-Taek Kang Dae-Kee Kwon Sol-Ji Park Su-Jin Kim Joon-Ho Moon Ok-Jae Koo Goo Jang Byeong-Chun Lee 《Journal of veterinary science (Suw?n-si, Korea)》2013,14(1):15-20
Quercetin is a plant-derived flavonoid found in fruits or vegetables that has antioxidant properties and acts as a free radical scavenger. We investigated the effects of quercetin on porcine oocyte nuclear maturation and embryonic development after parthenogenetic activation. We then evaluated the antioxidant activities of quercetin by measuring reactive oxygen species (ROS) levels in matured oocytes. Immature oocytes were untreated or treated with 1, 10, and 50 µg/mL quercetin during in vitro maturation (IVM). Quercetin treatment did not improve oocyte nuclear maturation, but significantly higher blastocyst rates (p < 0.05) of parthenogenetically activated oocytes were achieved when the IVM medium was supplemented with an adequate concentration of quercetin (1 µg/mL). However, cleavage rates and blastocyst cell numbers were not affected. Oocytes treated with 1 or 10 µg/mL quercetin had significantly lower (p < 0.05) levels of ROS than the control and group treated with the highest concentration of quercetin (50 µg/mL). Moreover, this highest concentration was detrimental to oocyte nuclear maturation and blastocyst formation. Based on our findings, we concluded that exogenous quercetin reduces ROS levels during oocyte maturation and is beneficial for subsequent embryo development. 相似文献
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试验旨在研究槲皮素对蛋鸡蛋壳品质的影响。选择体重和产蛋率相近的240只29周龄蛋鸡,随机分4组,每组6个重复,每个重复10只。对照组饲喂基础日粮,试验1、2、3组分别在基础日粮中添加0.02%、0.04%、0.06%槲皮素。结果表明:①与对照组相比,产蛋高峰期试验2组的蛋壳相对重极显著提高(P<0.01);在产蛋后期各试验组的蛋壳厚度均显著提高(P<0.05),试验2、3组的蛋壳相对重分别提高0.27%(P<0.05)和0.48%(P<0.01),试验1、2组的鸡蛋破软壳率极显著降低(P<0.01)。②产蛋高峰期各试验组的蛋壳钙含量均显著升高(P<0.05);产蛋后期试验2、3组的蛋壳钙含量显著提高(P<0.05),试验3组蛋壳磷含量显著降低(P<0.05)。③产蛋高峰期和后期各试验组的血清钙含量均极显著提高(P<0.01);在产蛋高峰期试验2组的血清碱性磷酸酶(ALP)含量极显著提高(P<0.01);在产蛋后期试验1组的血清ALP含量极显著降低(P<0.01),试验2、3组的血清羟脯氨酸(Hyp)含量均显著降低(P<0.05)。因此,0.04%槲皮素可有效改善产蛋后期蛋壳品质。 相似文献