MASS SPECTROMETRY, POTENTIOMETRIC METHODS, OSMOMETRY

mass spectrometry

• definitive identification and quantification of sample or compounds eluting from gc or hplc columns

proteomics

• study of proteomes and their functions

• complete set of proteins expressed by a genome, cell, tissue, or organism at a specific time

• collection of all proteins across a biological entity like cell organism or entire specie

potentiometric methods

• measurement of voltage potentials is based on the measurement of a potential (voltage) difference between two electrodes immersed in a solution under the condition of zero current electrochemical measurements.

ph meter

• potentiometric apparatus used to measure the concentration of hydrogen ions in solution

• it measures the potential difference between one half-cell and reference electrode

indicator electrode

• sensitive and responds to changes in concentration of a particular ion specie in the solution in which the electrode is immersed

• an electrochemical half-cell that interacts with the analyte of interest

ion selective electrode

• measure a potential across a membrane specific for a certain analyte

glass membrane electrode

• type of ise most commonly used for ph measurement

reference electrode

• a potential that does not change/influenced

• a electrochemical half-cell that is used as a fixed reference for the measurement of cell potentials

coulometry

• measurement of the amount of electricity passing between two electrodes in an electrochemical cell

• the amount of electricity us proportional to the amount of a substance produced or consumed by oxidation/reduction at the electrodes

coulumb

• is the unit of electric charge in the international system of units

amperometry

measurement of the current flowing through an electrical cell when a potential is applied

osmometry

• measure of solute particles in a solution in terms of their colligative properties

osmolality

• number of moles of particle per kilogram of water and depends only on the number of particles, not on what type of particles are present

colligative properties

• solution are related to the number of solute particles per kilogram of solvent