查询词典 determination

Guangdong college of pharmacy,guangzhou,guangdong 510006,china;henan university of traditional chinese medicine,zhengzhou,henan 450008,chinaabstract:objective to establish a method for the determination of the content of total alkaloid in nao mai tong recipe.methods acid dye colorimetry was used in the determination with bromocresol green buffer solution as the color developing agent with absorbance was determined at the detection wavelength of 417 nm.results the calibration curve of the absorbance was linear with the concentration of ligustrazine in the range of 0.031～0.153 mg/ml(r=0.9998).the average recovery of ligustrazine was 100.95％,rsd=1.75%.

作者单位：广东药学院中药化学与分析教研室，广东广州 510006；河南中医学院，河南郑州 450008 目的建立脑脉通有效部位中总生物碱的含量测定方法。方法采用酸性染料比色法，以溴甲酚绿缓冲液作为生物碱的显色剂，测定样品溶液在417 nm波长处的吸收度。结果对照品川芎嗪质量浓度在0.031～0.153 mg/ml的范围内与吸光度呈良好的线性关系，r=0.9998。平均回收率为100.95％，rsd为1.75％。精密度和稳定性良好。

Effect of different surfactants on the UV intensity of Al(superscript 3+)-MXFX have been studied. Is Cetyl Trimethy-lammonium Bromide can increase the UV intensity of Al(superscript 3+)-MXFX is discovered. Based on this reaction, the reaction conditions in detail and proposed a simple, rapid and sensitive new method for the determination of MXFX by UV method is inve stigated. This method has been applied for the determination of MXFX in tablet with satisfactory results.

通过研究不同表面活性剂对Al(上标 3+)-莫西沙星体系紫外特性的影响，发现十六烷基三甲基溴化铵对该体系有显著的增敏作用；系统研究了CTMAB-Al(上标 3+)-MXFX反应体系的紫外特性，利用这一反应体系，建立了简单、快速、灵敏的测定莫西沙星的紫外分光光度法，选择了最佳实验条件，并将此方法用于莫西沙星片剂的测定，结果满意。

BS 6806-2002 Textiles - Determination of formaldehyde - Method for the determination of total and free formaldehyde using chromotropic acid

使用铬变酸法测定甲醛的总含量和游离部分的含量

A method is described for the separate determination of diacetyl and 2,3-pentanedione in beer by GC-ECD, The conditions of sample preparation and GC determination have been-discussed.

本文介绍了采用GC-ECD分别测定啤酒中双乙酰和2，3-戊二酮的方法，文中讨论了样品制备及GC的测定条件。

ABSTRACT Objective To research the electrocatalytic action of poly film modifing electrode for determination of ciprofloxacin hydrochloride, an electroanalytic method of content determination CPLX was set up.

目的 研究聚中性红薄膜修饰电极对盐酸环丙沙星的电催化作用，建立一种定量检测CPLX的电化学分析方法。

Because the sex determination of Bombyx is a model of epistatic systems in inverteberates, the clarification of the sex-determining mechanism of this insect would be helpful for a comprehensive understanding of sex determination in invertebrates.

家蚕的性别决定是无脊椎动物中的一个上位体系模式，因此，家蚕的性别调控机制研究将有助于理解无脊椎动物复杂的性别调控机制。

Study on spectrophotometric determination of ferrum with phenylfluorone in thepresence of β-CD and OP ;2. A new method for the determination of trace Crwas studied,which was based on surfactant OP enhancement.

在HAc-NaAc缓冲溶液介质中，在乳化剂 OP 存在下，痕量铬对过氧化氢氧化中性红的褪色反应有很强的催化作用，据此建立了测定微量铬的催化动力学光度法。

Gravimetric Method for the Determination of salinity, acid-base titration indicator for the determination of the acidity.

重量法用于矿化度的测定，酸碱指示剂滴定法用于酸度的测定。

The merits of this approach include: Increase the efficiency of parting line determination algorithm by effectively excluding the faces irrelated with parting line determination; Be able to identify internal parting lines by utilization of molding features; Employ a proper objective function to determine the optimal parting line.

该方法的特点在于基于注塑的特征模型有效地排除了所有与确定分型线无关的塑件组成面，提高了算法的效率；通过注塑特征的使用，能够方便地确定内分型线；利用一种合理的分型线评价方法，确定优选的塑件分型线。

The present studies developed a method of spectrophotometry for quantitative determination of the total concentration of Jasminum flavonoids. The result showed the optimal determination wavelength was 500nm.

研究确定了最佳检测波长为500nm，以芦丁为标准品，在100～800μg/mL范围内，浓度和吸光度呈良好的线性关系，回归方程为A=0.0008C+0.0248，相关系数r=0.9999，回收率在96.5％～105％之间。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。