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A RigaKu 3070 X-ray spectrometer was applied to the determination of mineral elements in Astragal, and calibration made by using national plant standard reference materials.

报道了理学3070型X射线荧光光谱仪在测定宁夏黄芪样品矿质元素中的应用。

Objective To establish a method for the determination of polysaccharides in Astragalus membranaceus.

目的：建立黄芪有效部位多糖的含量测定方法。

Generally, it is necessary to combine high-efficient asunder technology with high-sensitive determination means.

在分析中通常需要将高效分离技术和高灵敏度的检测手段相结合。

First, the basic concepts of atomic structure, chemical bond, molecular and crystal structure are discussed with modern quantum mechanics knowledge and some physical methods for structural determination are introduced.

本课程也适当介绍化学学科的发展方向和研究前景，为希望在化学领域内继续深造的同学提供台阶。

At present,the sample pre-processing methods mainly include wet digestion,dry digestion and microwave digestion and so on;and the determination methods mainly include inductively coupled plasma mass spectrometry,atomic absorption spectrometry and atomic fluorescence spectrometry,etc..

目前常用的样品前处理方法主要有湿法消解、干法消解和微波消解法等；常用的测定方法主要有电感耦合等离子体质谱法、原子吸收光谱法、原子荧光光谱法等。

On the basis of the improved averaged atomic model,the distribution of the free electrons is dealt with by the partial-wave method to improve the precision of determination of the energy level,electron populations and atomic inner energy.

在改进的平均原子模型的基础上，在中心场近似下用分波法处理自由电子密度分布函数，提高了电子波函数、电子占据数等原子参数的计算精度。

The determination of trace cadmium in the sample of environment by flame atomic absorption spectrometry after separation and preconcentration by Cd-ion imprinted polymers has been developed.

研究了在Cd 离子印迹聚合物分离富集后，用火焰原子吸收分光光度法测定水中痕量镉的方法。

This paper introduces his outstanding contributions to the determination on new values of atomic weight when he was 90 years old.

本文介绍他在90高龄之际在原子量新值测定方面所取得的杰出成就。

Research of neodymium isotopic abundance measurement provides experimental and technical support of determination of neodymium atomic weight.

采用浓缩同位素进行丰度比的测量可以提高丰度测量的不确定度，减小最终结果的测量偏差。

This agreement shows that the method is available to complete the determination of atomic weight.

原子量测定结果的重合，说明 MC一ICP/MS绝对测量法同样可以完成原子量的测定。

Aquatic or marsh-growing fern allies; known to have existed since the Cenozoic; sometimes included in Lycopodiales.

生活于水中或湿地的蕨类；从新生代生存至今；有时归于石松目之中。

The engine was uprated from a 90hp Franklin to a 125hp Lycoming.

改良过的引擎是从90hp到125hp莱康明富兰克林。