吸收测定器

Based on measuring data of relative solar irradiance on absorbers with cylindric shapes in evacuated collector tubeas well as that of solar absorptivity changing with incident angles on the coating,this paper has analyzed and investigated regular patterns of energy gain factor changing with incident angle at different center to center distances of ECT with cylindric absorbers.

在实验测定吸热板表面相对太阳辐照度和涂层太阳吸收比的基础上，分析研究了具有圆柱形吸热体的真空管集热器，在不同管中心距下的能量收益因子随光线入射角的变化规律。

MethodsThe atomic absorption spectrophotometry and sulfurcarbon detector were used to determine 16 trace elements in 10 species of Fritillaria origin of determination.

方法利用原子吸收分光光度器和定碳定硫器对10种产地贝母中的16种微量元素进行了测定。

By synthetically analysizing the physical and chemical properties of all components and particle size, the content of F2641 in the JOB-iC is determined by gravimetric analysis after F2641 is seperated from HMX,TATB and PNP through ? alkali reflux. Determination conditions is set as follows the sample is boilingly refluxed for six hour in a constant temperature bath after adding lOOm! 8.0 ?? 0.1% NaOH. The solvent DMF saturated by TATB is used for extracting HMX,F21 and PNP from the sample and TATB is seperated by crucible filter G4. The mass precent of TATB is determined by extraction fractionation. The mass percent of PNP is measured by multiwavlength linear regression ultraviolet spectrophotometry. The testing conditions are set as follows:multiwavlength constitution: X=267nxn, 275nm, 283nm, 29mm, 299nm,the application scope of the Lambert-Beer law: the concentration of PNP is O.005?0.O25mgIml, the concentration of HMX is 0.060.3Omg/ml,absorption coefficents of PNP and HMX are solved by the slope of linear regression curve of absorbency- concentration of standard solution of PNP and HMIX for measuring wavelengthes,on the basis of the Lanibert-Beer law and absorbancy additivity principle, the slope of linear regression curve of A/E(1) and E1 of PNP and HMX solution is regarded as the concentration of PNP in the solution.

根据传爆药中各组分的物理、化学性质及主体炸药的粒度大小，进行综合分析，确定了采用碱回流重量法测定JOB-1C 中F_(2641)的含量，测定条件：加入100ml浓度为8.0±0.1％的氢氧化钠，在恒温水浴中煮沸回流6h；采用溶剂萃取法测定JOB-1C中TATB的含量，选择TATB饱和的二甲基甲酰胺为萃取溶剂，用G4坩埚式过虑器进行萃取分离；采用多波长线性回归紫外分光光度法测定JOB-1C中PNP的含量，通过实验确定了多波长组合：λ=267nm，275nm，283nm，291nm，299nm；朗波—比耳定律的适用范围为PNP浓度：0.005～0.025mg/ml，HMX浓度：0.06～0.30mg/ml；在测定波长下，对PNP、HMX标准溶液的吸光度—浓度进行线性回归，由回归曲线的斜率得出PNP、HMX的吸收系数；根据朗波—比耳定律和吸光度加和性原理，在测定波长下，对PNP、HMX 两组分混合溶液A_i/E_HMX(i与E_PNP(i/E_HMX(i进行线性回归，回归曲线的斜率即为混合溶液中PNP的浓度。

In order to establish relative analysis methods and find out transfer rules and vertical distribution characteristics of heavy metals in sediments of Poyang lake,column form sampler designed by us was used in the experiments,the sediments samples from Wucheng section of the Ganjiang River in Poyang lake area were collected using adjacent water vertical spile method.

为建立鄱阳湖水域沉积物中重金属的相关研究方法，了解重金属污染物的迁移规律，并探讨底泥中重金属的垂直分布特征，采用底质柱状采样器通过临水垂直插管法采集鄱阳湖流域赣江吴城段的底质样品，利用微波消解—AS-990型原子吸收分析体系对柱状样中不同深度的样品进行重金属Cu含量的测定。

The same instrument should normally be used to establish the calibration curve of the routine dosimeters and to measure the change in their absorbance after irradiation.

相同的仪器应通常被用来建立日常的辐射量测定器校准曲线及用来测量辐射后它们吸收度的改变。

Dosimetry is defined as the measurement of the absorbed dose by the use of dosimeters.

辐射量测定是通过辐射量测定器来测定吸收剂量。

Result: Evaporative Light-Scattering Detector has been widely used in assaying the compounds which have no UV absorption or when wavelengths for maximal UV absorption are under 200nm in natural products.

结果 ：蒸发光散射器在测定没有紫外吸收或仅在紫外末端有吸收的成分上有较大的优势和广泛的应用。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。