Determining the Water Potential of Potato Tubers Using Gravimetric anc Chardakov Techniques

Determination of moisture potential of potato tubers using gravimetric method and Chardakov method Introduction: Water potential (W) is a measure of the free energy state of moisture in plant cells and is the driving force of moisture control inside and outside the platform. It affects cells and various metabolic activities (O'Leary, 1970). Water potential differs depending on solute concentration, pressure and matrix particles, measured in megapascals (MPa), dissolved in plants such as ions, sugars, proteins, amino acids and other substances. Reduce the availability of free energy and induce solute potential (μS) with negative values.

Gravimetric analysis is a technique by which the amount of analyte (analyzed ions) can be determined by mass measurement. Gravimetric analysis relies on comparing the masses of the two compounds containing the analyte. The rationale for gravimetric analysis is to determine the mass of the ions in the pure compound and then to determine the mass percentage of the same ions in a known amount of impure compound. In order to make the analysis accurate, certain conditions must be satisfied.

Introduction: Gravimetric analysis is based on quality measurements. Gravimetric analysis is performed by separating the ions in the solution by precipitation reaction, filtering, washing the precipitate without contaminants, converting the precipitate into a product of known composition, and finally weighing the precipitate and Determining its mass by difference. The amount of the original ions can be determined based on the mass of the precipitate and the known composition. Theodore W. Richards (1868-1928) and a graduate student at Harvard University have developed or defined a number of techniques for analysis of silver and chlorine. These techniques are used for determination of the atomic weight of 25 elements, decomposition of the weight of known compounds, and determination of chloride content by gravimetric method.

Gravimetric analysis involves determining the amount of material present by weighing the sample before and / or after some conversion. A common example used in undergraduate education is to heat the sample to remove moisture and to determine the amount of water in the hydrate so that the difference in weight is due to loss of water. Titration involves adding the reactants to the solution analyzed until the equivalence point is reached. The amount of material in solution being analyzed can generally be determined. What is best known to those who have had a chemical reaction in secondary education is an acid-base titration method that includes a color change indicator. There are many other types of titrations such as potentiometric titration. For these titrations, different types of indicators can be used to reach equivalent points.