tory burch sale Automatic potentiometric titration

Automatic potentiometric titration method of N2O4 Purity Analysis

Average of 99.79, so No Purity Test, measured by automatic potentiometric titration results with GJB1673-93 method is small compared to the results measured, but the deviation of GJB1673-93 within the specified ± 0.3 can be determined that the two results agree. Technical Analysis Measuring 35.4 Conclusion automatic potentiometric titration as an alternative to manual operation of the apparatus of the titration method is simple, can eliminate the process of analysis to determine the end of the human, consumption and other aspects of the reading volume of the solution error analysis good results in parallel, which is calculated by the above experiment, the precision results can be confirmed. To N. o purity of the titration, for example, determined by GJB1673-93 manual titration method to determine the results of decentralized, often repeated several times to get the correct measurement results, and the use of automated potentiometric titration results of the standard deviation of only 0.09 changes coefficient of 0.09%. By comparing the experimental results show that automatic potentiometric titration and determination of GJB1673-93 Determination of N. o purity results agree, in N. o purity analysis application. References [1] National Defense Logistics. Spaceport Laboratory Technician Manual [z]. 1995 [2] Automatic Potentiometric Titrator Manual [z]. Separation and Concentration of Condensation yellow UDMH method of Liang Kailun components, Houzai Wen, Xiang Wang (63,605 units, Jiuquan, Gansu Province 732750) Abstract: using yellow constituent of UDMH in the condensation point of different substances by condensation method Yellow UDMH in the separation and enrichment of the material out of main components. Good solution to the difficult separation and enrichment of the composition of the yellow substance UDMH problems, and deterioration of UDMH causes yellow speculation and how to prevent deterioration of UDMH yellow provide a reliable basis. Key words: condensation separation and enrichment; condensation point; yellow UDMH; gas chromatography; method 0 Introduction Over the years, UDMH easy storage and transportation process in the yellow deterioration problems at home and abroad have not been applied properly completely resolved, in order to solve this problem, China has undertaken extensive research, has made great achievements, but UDMH yellow substance in the separation and concentration has not been solved. In this article,[link widoczny dla zalogowanych], use the yellow constituent of UDMH in the condensation point of different substances (boiling) temperature, the use of condensation in the yellow UDMH separated from the material, making further study of UDMH yellow metamorphic possible. l principle when the liquid temperature, its vapor pressure increases, when its vapor pressure and atmospheric pressure equal to, begins to boil. When the liquid in an atmospheric pressure boiling temperature is called its boiling point. Pure substance has a fixed boiling point, its boiling point in the range 1 ~ 3C, if the impurities increase the boiling point and boiling point range of more than 3 ~ 5C. Under critical pressure in the I, of gases to cool the gas liquefaction can. A certain pressure, when the gas mixture reaches a certain fraction of the vapor pressure of saturated vapor pressure of the pure component, the component to start cemented liquid. Composed of two or more components for multi-component ideal solution, gas-liquid phase equilibrium is reached when the relationship between the composition and the composition can Raout (Raoul) and Dalton (Dalton) to derive the law of that: According to Raout Law: P a p0XDalton Law: P always a Pl + P2 + ... + PY Y A PfP so a p0X / (P + P. + ... + P) where: P balance for the components in the partial pressure of the gas phase, mmHg or Pa; P i, for the pure component vapor pressure,[link widoczny dla zalogowanych], mmHg or Pa; X for the equilibrium, the concentration of components in liquid phase, mole fraction; P total is the total saturated vapor pressure, mmHg or Pa; P,[link widoczny dla zalogowanych], P. , ..., P, for the balance of each component in the partial pressure of gas in mmHg or Pa; Y for the gas in equilibrium, the concentration of each component, mole fraction. Evaporation of the yellow UDMH process,[link widoczny dla zalogowanych], we can be good as the yellow solution of UDMH. From the above we can see Raout and Dalton's law: when the external pressure P is equal to the total when UDMH began boiling; yellow UDMH vapors in the sub-components vapor pressure (or concentration) with the vapor pressure, temperature, components in the yellow solution of UDMH concentration and volatile (the boiling point with their related higher boiling point, volatile worse, the opposite is better. and the solution of volatile components from the other groups almost the existence of sub-) related. A certain pressure, the yellow UDMH vapor temperature is higher, the higher the relative concentration of each component,[link widoczny dla zalogowanych], on the contrary, the more low. In the mixed gas, the different components of the condensate with its corresponding point. We use the different components of gas mixtures of different condensation point,

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