杂质

The HPLC methods for analysis of N--ribitylxylidine and N-methyl glucamine were established. After optimizing the operation conditions, the principal product and main impurities were well separated. And they were determined by LC-MS. The operation condition of N--ribitylxylidine is, columniation temperature is 30℃, flow rate is 0.7mL/min, UV wave is 244nm, the mobile phase is methanol: water=40: 60 .

首次建立了对葡甲胺和核糖胺的高效液相色谱分析方法，通过对色谱操作条件的优化，成功分离了主产物和杂质，在此条件下，应用液相色谱-质谱联用仪对糖基胺及生成杂质进行了指派定性，并测定了两种糖基胺及其主要杂质的含量，获得了满意的结果。

It is that:(1) the related compounds in Metronidazole Buccal Tablets prepared by Chongqing Medical College can be tested by determining (321nm) the total peak area of the impurities;(2) The related compounds in Metronidazole Disodium Phosphate for Injection prepared by Chongqing Medical College can be test by determining (254nm) the total peak area of the impurities and the peak area of the largest impurity;(3) Ceftriaxone polymer in Ceftriaxone Sodium for Injection prepared by Chongqing Keru Pharmacy Co.

结果如下：①用HPLC一UV法，在321nm处检测，用归一化法计算，控制各杂质峰面积的和，可检查重庆医科大学的注射用甲硝吟磷酸二钠中的有关物质：②用HPLC一UV法，在254nm处检测，控制杂质峰面积的和及控制最大杂质峰面积，可对重庆科瑞制药股份有限公司的注射用头饱曲松钠中的有关物质实施控制；③用HPLC一Uv法，在254nm处检测，按外标法计算，可检查注射用头抱曲松钠中的聚合物；④用紫外分光光度法，在277nm波长处测定吸收度，按C6H9N303的吸收系数为377计算每片标示百分含量，可测定重庆医科大学的甲硝哇口颊片的含量均匀度；⑤用紫外分光光度法，在277run波长处分别测定释放溶液20min、50min和90min的吸收度，按甲硝哇(C6H剥303)的吸收系数为377计算释放度，可检查重庆医科大学的甲硝哇口颊片的释放度。

The study of acceptor Ga open-tube diffusion in SiO2/Si has been carried for several decades, whose pursuing was only to get the diffused surface of high uniformity and reproducibility and impurity distribution in Si which can improvethe electrical performance of the devices, but the various manifestation of Ga segregation effect at the SiO2-Si internal interface and the dynamic intendancy of the impurity concentration variability have not been reported.

关于受主杂质Ga在SiO_2／Si系统进行开管掺杂的研究已有几十年的历史，研究的内容与追求的目标主要集中在如何获得高均匀性、重复性的扩散表面和提高器件电学性能的硅体内杂质分布形式，而对Ga在SiO_2-Si内界面上分凝效应的各种表现，以及由此造成的近硅表面杂质浓度动态变化趋势尚未见报导。

Based on the 2-D distribution of channel impurity, the distribution of 2-D electric field and 2-D interaction potential, which is caused by the interaction between the ionized impurity in the depletion layer and radiation induced positive spatial charge, is analyzed by using image charge method. Resolving Poisson equation, the mobility expression of N-type and P-type non-uniform channel MOS and the mathematics expression of the threshold voltage model of DMOS are obtained.

基于沟道杂质的非均匀分布，借助镜像法导出非均匀沟道辐照正空间电荷和沟道中电离杂质的二维场及其作用，给出非均匀沟道DMOS器件辐照正空间电荷与沟道杂质的二维互作用势。

With the observation of the outward appearances, it can be known roughly that if the sample was added with adulterations. Since the beeswax dissolves in the benzene but the adulterations, such as gypsum, starch and so on do not, these can be determined. By the verification of acid value and alcohol dissolve ability, the acid or non acid added can be determined. By the change of saponification value, the ester or non ester added can be determined. By the carbonification degree in the concentrated sulphuric acid, the mineral wax, such as paraffin wax added can be determined.

通过样品外观的观察初步定性是否掺有杂质；利用纯蜂蜡在苯中溶解，而掺入的石膏、面粉和淀粉等杂质在苯中不溶而定量鉴定这类杂质；由酸值变化和乙醇溶解物的量，测定掺入的硬脂酸等酸性物质或其它的非酸性物质；由皂化值变化，定量测定掺入的动物脂等酯类物质或其它的非酯类物质；根据蜂蜡中的烃类在浓硫酸中可被炭化，加入的石蜡等矿物蜡不被炭化来测定此类掺杂物。

The results suggested that compared with A-starch and maize starch, there are more quantities of impurities, such as protein, lipid and pentosan, in B-starch. B-starch prepared in the laboratory almost has the same compositions as three samplings, and accords with the reports of some documents too. Differing from the granules in A-starch, those in B-starch are smaller sized (1-10m)and oval shaped, and felted each other. The crystallogram of A- and B-starch are similar, i.e. A type. There is difference in granular distribution between A- and B-starch. The granular distribution of B-starch is anomalous and extensive (l~1259m).B-starch has bigger dilatancy and retrogradation, and smaller blue value, solubility, viscosity, gelatinization temperature and gelatinization enthalpy.

试验结果表明：跟玉米淀粉、A淀粉相比较，B淀粉含有的蛋白质、脂肪和戊聚糖等杂质数量多；实验室制备的小麦B淀粉中淀粉、粗蛋白、戊聚糖等含量均与文献的报道接近，也与在工厂采样的B淀粉相近；与A淀粉不同，B淀粉以小颗粒的淀粉为主，平均粒径1～10μm，颗粒形状呈椭圆形，同时颗粒和颗粒之间黏结紧密；B淀粉和A淀粉晶形结构相似，都为A型；B淀粉的粒度分布情况不同于A淀粉，其粒度分布规律性不强，分布范围也较宽，粒度在1～1259μm之间；B淀粉的凝沉值和膨润力大于A淀粉，而沉降体积、蓝值、溶解度、粘度、糊透光度、相变温度和热焓均小于A淀粉；杂质的含量对B淀粉性质的影响是明显的，随着杂质含量的增加，沉降体积、溶解度和透光度减小，膨润力增大，但是它们对凝沉值、蓝值和粘度的影响比较复杂。

The disclosed combined detection method for high-pure SO3 gas with SO2 as impurity comprises: constant-volume sampling at least 60Deg better 60-80Deg to avoid liquidation of SO3, absorbing with alkali solution to obtain total volume percentage concentration of high-pure SO3 gas and SO2; processing the absorbed liquid, using iodometric method to obtain SO2 volume percentage concentration and then the SO3 concentration.

一种高纯度SO 3 气体及其中杂质SO 2 气体浓度联合检测的方法，包括用吸收装置进行定容采样，然后用碱溶液吸收，得到高纯度SO 3 气体及其中杂质SO 2 气体的总体积百分浓度，再对吸收液进行处理后，采用直接碘量法测得SO 2 气体的体积百分浓度，将高纯度SO 3 气体及其中杂质SO 2 气体的总体积百分浓度减去SO 2 气体的体积百分浓度即为高纯度SO 3 气体浓度，其所述吸收装置进行定容采样时，是在至少60℃以上的热环境中进行的。

However, the properties of isoelectronic impurity doped crystals have not been clearly understood, such as optical and electrical properties, mechanism for dislocation reduction, and so on; In addition, the effects of isoelectronic impurities on defects and lattice mismatch of heterostructures have not been given much attention.

然而对于等电子杂质在材料中的其它物理行为，等电子杂质降低位错的机理，以及等电子杂质对异质外延材料中缺陷和晶格失配的影响等问题研究得并不深入。

The our company after relates in every way according to the above situation, already from overseas massively purchased the ZX-10 series desulphurization catalyst, has been able to coke with this catalyst technology the sulphonium compounds which the triphenyl contained, the nitrogen compound , the unsaturated compound and very many impurities, the fetid odor and so on removes, after the processing triphenyl always Sulfur content was lower than the petroleum benzene, the smell, the color, was consistent with the petroleum benzene.

目前焦化三苯在工业上使用范围小，销售价格也低于石油三苯。其主要原因是硫、噻吩等杂质含量高、气味重。而现在国际、国内焦化三苯、汽油、柴油等产品脱硫提纯去杂质的工艺均采用高压催化加氢法处理，该工艺设备投资巨大。根据以上情况我公司经多方联系，现已从国外大量购进ZX-10系列脱硫催化剂，用本催化剂技术已能将焦化三苯所含的硫化合物、氮化合物、不饱和化合物及很多杂质，臭味等脱除，处理后的三苯总硫含量低于石油苯，气味、颜色，均与石油苯一致。

At first, mineral composition and distributing of impurities in andalusite grains were studied by SEM and EDS. The results showed that main mineral impurities were biotite, ilmenite, clay species, the wall rock conglutinated at brim of andalusite and impurities in the chiastolitic cruciform pattern were easily removed, but the small impurities in andalusite grain were hardly removed.

首先，利用SEM和EDS分析了红柱石矿的矿物组成和杂质分布，结果显示这种红柱石矿所含的杂质矿物主要是黑云母、钛铁矿和黏土矿物等，其中分布在红柱石颗粒边缘的围岩和空晶石内的黑十字容易去除，而分布在晶内的细粒杂质则不易去除。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐