查询词典 titration

A new method for determination of Pd using precipitation separation by butanedione dioxime as a selective reagent and complexometic titration EDTA released from EDTA-Pd complex was established.

建立了丁二肟选择性沉淀分离和析出EDTA-Pd络合物中的EDTA，Pb(NO3)2返滴定测定Pd的新方法，系统地研究了在硝酸或盐酸介质中测定Pd的条件，并对比了本法与《国家标准》分析方法的结果。

A modified analysis method based on the determination of ozone—indigo disulphonate spectrophotometer(GB/T 15437-1995) in gas phase has been developed to detect the concentration of ozone in liquid phase. An analytical condition of λmax=612～615 nm,ε=20 000 L/, pH 2 is obtained by the titration of indigo disulphonate. Compared with potassium iodide method,it shows a higher precision and accuracy,CV＜3.0%. The results also prove that blank experiment will bring about 5.0%systematic error.

在气相臭氧浓度的靛蓝二磺酸钠分光光度法(GB/T15437-1995)基础上提出了液相臭氧浓度的测定方法，采用靛蓝二磺酸钠标准曲线法代替采用易分解的臭氧标准曲线法，得出测定条件λmax=612～615 nm、ε=20 000 L/、pH为2，通过碘量法比较实验，说明新的测定方法具有较高的精度和准确度，相对标准偏差小于3.0%；比较结果表明忽略空白实验将引入5.0%的系统误差。

The graphite and acetylene black are added to a anode material in making Zn-Mn battery, therefore the sample solution prepared appears as feculency and the titration end point of the solution is difficult to judge when active manganese in the battery is determined by iodimetry with starch as a indicator.

在测定锌锰干电池锰粉中活性二氧化锰含量时，由于制备电池时正极锰粉中添加了乙炔黑、石墨等导电材料，使制得的样品溶液显色且混浊，影响用淀粉作为指示剂进行碘量法滴定终点的判断。

We have synthesized fourdioxotetraamine ligand appended with fluorenyl group and their transition metal complexes.The crystal structures of the complexes were determined by x-ray diffraction. Stability,electrochemistry and switch properties in aqueous solution was studied by pH-potentiometricand fluorimetric titration as well as cyclic voltammetry.

合成了带侧链荧光基团—芴的二氧四胺配体及其过渡金属配合物，测定了过渡金属配合物的晶体结构，研究了他们在水溶液中的稳定性、电化学性质和荧光开关性质。

When hydrochloric acid was added into saccharin sodium solution,chemical reaction happened,whose product was glucide,which cannot be dissolved in water,however,it can be dissolved by ethyl acetate,therefore glucide can be extracted from other components,then can be determined by titration with sodium hydroxide.

利用糖精钠与盐酸反应生成不溶于水而溶于乙酸乙酯的物质，将其萃取出来，然后再利用氢氧化钠对其进行滴定分析，采用二分试差法准确测定了某镀光亮镍添加剂中糖精钠及某镀光亮镍液中糖精钠的含量，分别为88。

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 reaction between technetium and hydrazine in nit ric acid medium is studied by the titration of the concentration of hydrazine and pursuing the concentration of heptavalent technetium along with time.

利用溴代丁二酰亚胺滴定肼和跟踪Tc浓度随时间变化的方法，研究了硝酸介质中锝与肼的反应。

During the titration of Ca〓CaM by La〓, the hydrid complex La〓Ca〓CaM forms as the intermediate species. La〓 can bind to calmodulin with high affinity (K〓=10nmol/L) and obvious cooperation between the two global domains. The secondary structure of La〓CaM and Ca〓CaM are highly similar, but there are obvious differences in ternary structures. Excessive La〓 changes the conformation of calmodulin greatly.

实验结果表明，La〓在钙调蛋白上的结合位点与钙离子相同；在结合顺序上La〓以较小的优势先结合在钙调蛋白的N末端；La〓Ca〓CaM是La〓与含钙的钙调蛋白作用时的主要产物；La〓强烈地与钙调蛋白结合，其解离常数约10nmol/L，各个结合位点之间存在明显的协同效应；La〓CaM与Ca〓CaM在二级结构上高度相似，但是在高级结构上有明显差异。

The tendency to hydrolyzation of APP can be inhibited in the improved titration methods to a certain extent.

在采取上述措施后，得到了较可信的聚磷酸铵聚合度测定结果。

Main results are as follow: 396 patients (3.73%) developed hypohidrosis and the incidence rate in children was much higher than that in adults. Most hypohidrosis occurred during drug titration and in warmer seasons.

主要研究结果如下：接受托吡酯治疗的患者中396例(3.73%)发生泌汗障碍，主要为12岁以下儿童，泌汗障碍的发生率在成年以前随年龄增大而逐渐降低；儿童、青少年及成年患者泌汗障碍的发生率分别为5.85%，0.96%和0.30%。

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。