scholarly journals Separate Determination of Borohydride, Borate, Hydroxide, and Carbonate in the Borohydride Fuel Cell by Acid-Base and Iodometric Potentiometric Titration

2014 ◽  
Vol 2014 ◽  
pp. 1-10
Author(s):  
A. V. Churikov ◽  
S. L. Shmakov ◽  
V. O. Romanova ◽  
K. V. Zapsis ◽  
A. V. Ushakov ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Separate Determination ◽  
Quantitative Chemical Analysis ◽  
Iodometric Titration ◽  
Acid Base ◽  
Titration Method ◽  
Titration Curves ◽  
Determination Error ◽  
Fuel Mixtures

A methodology for quantitative chemical analysis of the complex “borohydride-borate-hydroxide-carbonate-water” mixtures used as fuel in the borohydride fuel cell was developed and optimized. The methodology includes the combined usage of the acid-base and iodometric titration methods. The acid-base titration method, which simultaneously uses the technique of differentiation and computer simulation of titration curves, allows one to determine the contents of hydroxide (alkali), carbonate, and total “borate + borohydride” content. The iodometric titration method allows one to selectively determine borohydride, so the content of each of OH-, BH4-, BO2-, and CO32- anions in the fuel becomes estimated. The average determination error depends on the number and ratio of compounds in a mixture. Specific details of the analysis of various fuel mixtures are discussed.

scholarly journals Determination of Surface Acidity on The Natural and Synthetic Montmorillonite Clays by Titration Method

2021 ◽  
Vol 9 (2) ◽  
pp. 94-98
Author(s):  
Serly J. Sekewael
Keyword(s):  
Surface Acidity ◽  
Acid Sites ◽  
Total Acidity ◽  
Ftir Analysis ◽  
Acid Base ◽  
Absorption Bands ◽  
Titration Method ◽  
Montmorillonite Clays ◽  
Natural And Synthetic

Determination of surface acidity on the natural and synthetic montmorillonite clays has been carried out using the acid-base titration method to count the number of bound acid sites per gram of clay. The total acidity of natural and synthetic montmorillonite surfaces obtained was 4.67 and 5.33 mmol/g, respectively. FTIR analysis results indicate the presence of functional groups from the tetrahedral and octahedral constituents. Both samples have similar absorption patterns. The similarity of absorption patterns was followed by a decrease in intensity and shift in some absorption bands, and the appearance of new absorption bands.

Determination Methods of Dialdehyde Celluloses from Bacterial Cellulose

2007 ◽  
Vol 361-363 ◽  
pp. 507-510
Author(s):  
Yu Hong Feng ◽  
Jia Cheng Li ◽  
Qiang Lin ◽  
Su Juan Pang ◽  
Meng Ying Zhang ◽  
...  
Keyword(s):  
Bacterial Cellulose ◽  
Amino Nitrogen ◽  
Aldehyde Group ◽  
Acid Base ◽  
Titration Method ◽  
Cannizzaro Reaction ◽  
Acid Base Titration ◽  
Determination Methods ◽  
Oxidation System

This paper addresses the determination of aldehyde group (% of dialdehyde units) in dialdehyde cellulose (DACs) oxidized from bacterial cellulose (BC). With 4 determination methods, the oxidation degrees of DACs were studied: Automatic potential titration method through Schiff base reaction, Acid-base titration in Cannizzaro reaction, Metaperiodate consumption determination, and Measurement of amino nitrogen content in DAC derivatives. By comparing determination results of these methods, we found out the proper way suitable for this metaperiodate oxidation system of BC to measure the dialdehyde unit content of the DACs.

Determination of Total Sulfur in Rubber

1945 ◽  
Vol 18 (3) ◽  
pp. 663-666 ◽  
Author(s):  
C. L. Luke
Keyword(s):  
Hydriodic Acid ◽  
Total Sulfur ◽  
Iodometric Titration ◽  
Titration Method ◽  
Acid Reduction

Abstract The range of the hydriodic acid reduction-iodometric titration method for the determination of sulfur in semimicrosamples of rubber has been extended to provide for the analysis of macrosamples containing as much as 100 mg. of sulfur.

scholarly journals The use of Potentiometric Mass Titration (PMT) technique for determining the acid-base behavior of activated sludge

2015 ◽  
Vol 17 (2) ◽  
pp. 397-405 ◽  
Keyword(s):  
Wastewater Treatment ◽  
Activated Sludge ◽  
Point Of Zero Charge ◽  
Acid Base ◽  
Solution Ph ◽  
Titration Curves ◽  
Potentiometric Mass Titration ◽  
Mass Titration ◽  
First Time

<div> <p>Activated sludge is a biological floc composed of microorganisms, organics, and inorganics and plays an important role in wastewater treatment. The pH of an activated sludge suspension determines the acid &ndash; base behaviour and the charge of the microorganisms in water. In the present study, the determination of acid &ndash; base behaviour of activated sludge was performed using microelectrophoresis and Potentiometric Mass Titrations (PMT). For activated sludge that is a complicated biological system, direct microelectrophoresis is not a suitable method for the determination of its ζ-potential. This method leads to a variety of isoelectric point (iep) values due to the presence of different microorganisms in activated sludge. On the contrary, the PMT method used for the first time for activated sludge can provide the overall point of zero charge (pzc) value that is 8.2. In addition, a simple methodology is proposed for the quantitative determination of the overall solid charge as a function of solution pH, which requires only (a) the titration curves of an electrolyte suspension and of the blank electrolyte solution and (b) the calculation of the H<sup>+</sup> ions consumed for the above titration curves.&nbsp;</p> </div> <p>&nbsp;</p>

Sign in / Sign up

Export Citation Format

Share Document