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|  | | 为了更好的帮助您理解掌握查询词或其译词在地道英语中的实际用法,我们为您准备了出自英文原文的大量英语例句,供您参考。 | |
The propylene glycol concentration represented a caloric midpoint between the 5 and 10% ethanol.
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| | A capillary gas chromatography based on internal calibration principle was de-veloped for determination of methanol and glycal content in 706 decendant plasma During the determination, propylene glycol was taken as a internal calibrator.Therewas a good linear relationship between the peak area and propylene glycol concentration.When both the concentration ratio of methanol to propylene glycol was 0. 02 : 1~0. 32 : 1and the concentration ratio of gly... | | 本文采用内标法,以丙二醇为内标物,应用上分1002型气相层析仪测定羟乙基淀粉代血浆中残留甲醇和乙醇的含量。选用天津试剂二厂弹性石英交联聚乙二醇—20M毛细管色谱柱,以氢火焰离子化检测器检测,氮气为载体,分流进样.当甲醇和丙二醇内标物浓度比为0.02:1~0.32:1,乙二醇和丙二醇内标物浓度比为1.0:1~4.0:1时,被测物质峰面积与浓度呈线性关系,测定了甲醇和乙二醇的相对定量校正因子.甲醇平均测定回收率为98.79%,相对标准偏差CV=0.013%,乙二醇的平均回收率为97.77%,CV=0.011%. | | 文摘来源 | | OBJECTIVE To determine the soluble conditions of the black-sticky division after alcohol extraction and evaporation of fructus psoraleae. METHODS Orthogonal experiment was done, using the contests of psoralen and isopsoralen as indexes, propylene glycol concentration, propylene glycol volume and polysorbate-80 volume serving as factors. RESULTS The optimal conditions for the solution of psoralen and isopsoralen was 6 times of 50% propylene glycol, and polysorbate-80... | | 目的 优选丙二醇对补骨脂经醇提水沉后所得的不溶于水的黑色黏稠物的溶解条件。方法 正交试验法,以补骨脂素和异补骨脂素为指标,考察丙二醇的用量、丙二醇的浓度和吐温-80的用量3个因素。结果 丙二醇对补骨脂的水不溶物的最佳溶解条件为用6倍量50%的丙二醇溶解补骨脂的黑色黏稠物,所得溶液中补骨脂素和异补骨脂素的含量最高,吐温-80以不加入为佳。结论 丙二醇对补骨脂黑色黏稠物有较好的溶解度,吐温-80的加入不利于补骨脂素和异补骨脂素的溶出。 | | 文摘来源 | |   |
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