电流测定

Functional improvement was conducted to model YS - 2 microcoulometer recommended in GB 7600 - 1987, and model DT - 305 automatic microwater aquameter was designed.

对GB 7600-1987推荐的YS-2型微库仑仪进行了功能改进，设计出DT-305型全自动微量水分测定仪，增加了大电流冲击电解液中的残余水分、掉电存储参数、通讯、程序升级等新功能，仪器改进后提高了测量的准确度和实验的方便性。

In this paper, the electroplating of bright Zn-Ni alloy process was studied, the effect of (1-hydroxy ethylidene diphosphonate acid coordinating agent, chloride content, [Zn2+]/[Ni2+] mole ratio, cathode current density, temperature, a class of aldehyde compound (abbreviated as ZNP additive agent) and supplementary coordinating agent on Ni content, and brightness of plating layer was discussed, the physical phase of alloy plating layer and stability of plating solution were determined.

研究了用有机多膦酸盐作络合剂，ZNP作添加剂电镀光亮锌镍合金，探讨了络合剂、氯化物含量、[Zn2+]/[Ni2+]比、阳极电流密度、温度、辅助络合剂对合金中镍含量的影响，测定了合金镀层中物相组成及镀液稳定性，通过筛选得出最佳最镀光亮锌镍合金的镀液组成及工艺条件，并讨论了锌镍合金的异常共沉积机理。

Finally, in chapter 7, a simple method for the determination of critical micellar concentrations of SDS in different media was proposed based on current-monitoring.

第七章建立了一种简单的利用电泳谱图上电流的变化测定表面活性剂SDS在不同介质中的临界胶束浓度的新方法。

The introduced techniques include changing the state of firebox in lamellar sample and the state of the sample in firebox, changing oxygen pressure in firebox and adjusting operation mode of rotating key which controls the electrical current of portfire.

该文分析了燃烧热测定实验常见的失败原因，并针对其中的主要原因，提出了 4点改进方法，即改变燃烧丝在片状药品中的状态和位置，改变药片在氧弹内坩埚中的状态，改变氧弹内氧气的压力值和改变点火电流控制转钮的操作方式。

The optimized analytical conditions were as follows: discharge voltage of 1 100 V, discharge current of 50 mA, preburn time of 45 s and integration time of 10 s.

以铁为内标元素，优化分析条件为放电电压1100V，放电电流50 mA，预溅射时间45 s，积分时间10 s，建立直流辉光放电光谱法测定硅钢中11种元素的定量分析方法。

The setting of parameters is as follows; sample weight of 0.15g, the maximum work current of 350mA, the flow capacity of carrying gas of 3L/min, the purity of oxygen of 99.99%, the precleaning time of l0s, the predelay time of 10s, the analytical period of 60s, the comparison level of 1.0%. The blank of ceramic crucibles could be reduced to minimum by burning them for 2h at 1100℃.

其最佳测定条件为：样品称量为0.15g左右；最大工作电流350mA，载气流速为3L/min，载气纯度99.99%，陶瓷坩埚需经1100℃灼烧2h后，可使空白降至最小，预清洗时间10s，预延时间10s，破元素最短分析时间为60s，比较水平为1.0%。

Morphology and grain size of alloys were analysed by SEM. The effect of current density, pH value, organic additives and rare earth samarium on cobalt content were studied, the adhesion of the film were tested by heating.

采用扫描电镜分析了镀层的微观形貌及晶粒尺寸，研究了电流密度、pH等工艺条件以及有机添加剂和稀土钐对镀层中钴含量的影响，采用加热实验法测定了镀层的结合力。

The optimal parameters for catalytic reaction of LiP or MnP on theelectrode in electrochemical enzyme sensor are obtained,which are pH of4.2,H_2O_2 concentration reaching 0.1875 mM,0.25 mM hydroquinone and 6mM veratryl alcohol.In the optimal reaction system,LiP and MnP aredetermined exactly by the sensor.

实验确定了电化学酶传感器裸玻碳电极对LiP、MnP体系的催化反应的响应最为灵敏且电流变化较大的最适pH值(pH4.2)、H_2O_2(0.1875 mM)、对苯二酚(0.25 mM)、藜芦醇(6 mM)含量等参数，在该反应条件下传感器能准确测定LiP、MnP。

In order to solve the problem of crevice corrosion resulted from the warping and cracking of the coatings, the feasibility of cathodic polarization with square wave pulse and the effectiveness of its control over wedgy crevice corrosion were explored.

在外加阴极极化的条件下，缝内极化电流相对较小，缝内极化电位比缝外金属略正；缝内Cl〓浓度降低，pH值显著升高；测定了这些参数在缝内的位置分布。

This paper set up a new method of SeC determination by differential pulse voltammetry at the / GC electrode.

依据SeC的还原峰电流与其浓度成线性递增关系，在充分探讨多种影响因素的基础上建立了／GC电极上微分脉沖伏安法测定SeC含量的新方法，其线性范围为5.0×10~(-8)～7.0×10~(-4) mol·L~(-1)，检出限为3×10~(-8) mol·L~(-1)。

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