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- secondary standard substance [化] 副基准物
- Objective:To standard substance of Crebanine(Cre). 目的:制备含量测定用克班宁对照品。
- Objective: To standard substance of Crebanine (Cre). 摘要目的：制备含量测定用克班宁对照品。
- From 2002 to 2004, the quality of ambient air in urban area of Qinzhou city reach national secondary standard. 摘要2002年至2004年，钦州市区环境空气质量达国家二级标准。
- Objective: To study the preparation and analysis technique of standard substance picrinine. 目的:以灯台叶为原料,研究鸭脚树叶碱对照品的制备与分析技术。
- A working standard (i. E., In-house or secondary standard) is a standard that is qualified against and used instead of the reference standard. 工作对照品(也就是内部标准品或二级标准品)是根据一级对照品标定的,并用来代替一级对照品的。
- The content of flavonoids in waste liquid of alcohol production from sugarcane molasses was determined by spectrophotometry using rutin as standard substance. 以芦丁为标准物质,用分光光度法测定了甘蔗糖蜜酒精废液中黄酮类化合物的含量。
- The chymopapain whose purity equal to standard substance was get by twice protein chromatography on Macro-Prep High S Support. 采用硫酸铵分级沉淀与离子交换相结合的方法从市售的木瓜蛋白酶干粉中分离纯化木瓜凝乳蛋白酶。
- The determination using boric acid-citric acid colormetry with the standard substance of Rutin by UV-visible recording spectrophotometer. 通过正交试验确定了最佳提取工艺。
- Methods: Volumetric analysis combined with quantitative microscopy was used to determine Saiga tatarica content by sample itself as standard substance. 方法:以被测物自身为标准,代替参比物,并采用容量分析法配合显微定量法测定羚羊角的含量。
- Their pureness deterimined in methods of two different priciples and conformed to the technical norm of first grade military standard substance. 四种标准物质采用两种不同方法定值，结果均达到一级军用标准物质要求。
- Using methanol as solvent and sodium methanol standard solution as titrant,the certification of NTO standard substance was investigated by non-aqueous titration. 以甲醇为溶剂,采用甲醇钠溶液作为滴定剂,通过非水滴定法对NTO的定值方法进行研究,选择了最佳条件。
- Our company is specialized in trading chemical reagent, food additive, pharmaceutical adjuvant, standard substance and laboratory consumables, totally over 4000 types. 我公司专业经营化学试剂、食品添加剂、医药辅料，标准品及实验室消耗品，品种达4000余种，行销全国三十多个省市、自治区。
- Objective To establish a simple and quick method for preparation of human B lymphocyte stimulator receptor-BCMA gene expression level quantitative standard substance. 目的建立一种简便快速BCMA基因表达水平定量标准品的制备方法。
- National Secondary Standard of Fatness Machine 平面度副基准装置
- secondary standard reference surface 二极标准磁盘面
- A series of standard solution made up with standard substance of sodium carbonate, and combusted in a high-frequency induction furnace with pure oxygen, and the amount of total carbon was measured by infrared absorption. 摘要以碳酸钠为基准物质，配成一系列标准溶液，在通有纯氧气的高频炉中燃烧，红外吸收法测定碳含量，绘制校准曲线，测定矽中总碳量，与推荐值基本一致，方法准确、结果满意。
- The nanocrystalline ZSM-5 with SiO_2/Al_2O_3 ratios of 100 was successfully synthesized by hydrothermal method with mesoporous carbon nanotubes (CNTS) as the inert matrix and micrometer ZSM-5 zeolite as standard substance. 水热法合成常规微米 ZSM- 5分子筛并使用其作为基准物 ,以中孔碳纳米管为惰性基体 ,限定空间尺寸法合成了 Si O2 /Al2 O3 =1 0 0的纳米 ZSM- 5分子筛。
- The components of methylhydracyclosiloxane were analyzed quantificationally by superficial unitary method and internal standard method,taking n decane as internal standard substance. 分别采用面积归一法和内标法(正癸烷为内标物)对甲基氢混合环硅氧烷馏出液和釜料中各组分进行定量分析。
- The contents of polysaccharide in \%Zizyphus jujuba MILL\% was measured by phenol-H\-2SO\-4 \{colorimetry.\} The standard substance was pure polysaccharide. The contants of polysaccharide was 55.03%. 以大枣多糖纯品为标准品,采用苯酚-硫酸比色法对大枣渣中多糖进行含量测定,结果表明大枣渣中多糖含量为55。03%25。
