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Egg yolk phosphatidylcholine(EYPC) is being widely used in food and pharmaceutical industries nowadays owing to its surface activity,pharmaceutical usefulness,and so on.Common determination methods of phospholipids were based on the American Oil Chemists’ Society(AOCS) Official Method Ja7b-91,in which n-hexane/2-propanol/acetate buffer was used as the mobile phase.In order to achieve desired results,gradient elu-tion or buffer solution was used,which made the detection process more complicated.Moreover,water or buffer solution could affect the silica gel column both on its lifespan and the separation efficiency significantly.In this study,different mobile phase and detector were used to simplify EYPC analyzing process instead of using water within the mobile phase.The optimized HPLC operating conditions are as follows:pure methanol as a mobile phase,flow rate of 1.0 ml·min-1,silica gel column(250 mm×4.6 mm,5 μm,Inertsil GLTM),column temperature 30 ℃ and low temperature evaporative light scattering detector(40 ℃,0.35 MPa) as used.Under this optimal condition,the linear relative coefficient of the standard curve is 0.998 and the recovery was in the range of 96.83%-101.58% with a relative standard deviation of 1.79%(n=6). 相似文献
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研究核桃内种皮多酚提取物对D-半乳糖致衰小鼠脑组织氧化损伤程度的调节。选取ICR雄性小鼠60只,随机分为5组,每组12只,对模型对照组和剂量组小鼠采取颈部皮下注射D-半乳糖[120 mg/(kg·bw·d)]制造衰老模型,低、中、高剂量组分别灌胃200、400、800 mg/(kg·bw·d)的核桃内种皮多酚提取物,模型对照组灌胃等量的双蒸水。给药7周后,通过旷场试验、紧绳实验和平衡木实验检测每组小鼠间的行为学差异。8周后,取脑组织,测定脑组织匀浆中超氧化物歧化酶(SOD)、过氧化氢酶(CAT)、谷胱甘肽过氧化物酶(GSH-Px)活力和总抗氧化能力(T-AOC)及丙二醛(MDA)的含量。结果表明,与模型对照组相比,核桃内种皮多酚提取物可显著提高小鼠的运动和探索能力,增强小鼠的兴奋性和对环境的适应性。同时,脑组织中SOD、GSH-Px活力和T-AOC含量较模型组有显著升高。这表明核桃内种皮多酚提取物可减轻D-半乳糖导致的行为迟钝,并能减轻小鼠脑部的氧化损伤。 相似文献
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[目的]寻求一种天然澄清剂用于罗汉果甜苷提取液澄清的最佳工艺。[方法]以加入ZTC-II型天然澄清剂后罗汉果甜苷提取液的透光率、罗汉果甜苷V的保留率为评价指标,在单因素分析的基础上,应用正交试验设计优化澄清条件,研究澄清剂的总添加量、提取液浓度、A与B组分的比例、加入澄清剂时的温度和搅拌速度的影响。[结果]ZTC-II型天然澄清剂对罗汉果甜苷提取液的最佳澄清条件为:罗汉果甜苷提取液稀释为原浓度的0.67倍后,40℃保温,加入B组分(浓度为1%)2.33 mL/100 mL,A组分(浓度为1%)0.67 mL/100 mL,保温30 min,综合评分达到98.21%。[结论]ZTC-II型天然澄清剂可用于罗汉果甜苷提取液的澄清工艺,效果良好。 相似文献
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