chemistry

Analytical Chemistry - Calibration Home > Analytical Chemistry > Calibration CALIBRATION What is calibration? Calibrated instruments|Analytical Chemistry Calibrating a pH meter using buffers Quantitative Analysis by Atomic Absorption Performance Verification of Analytical Balances according to ISO/IEC 17025 Calibration and Outliers - Statistical Analysis Calibration of an instrument in Analytical Chemistry is the operation that determines the functional relationship between measured values (signal intensities S at certain signal positions zi) and analytical quantities characterizing types of analytes qi and their amount ( content , concentration ) n. Calibration includes the selection of the model (its functional form), the estimation of the model parameters as well as the errors, and their validation. During calibration , the in...

Atomic Absorption Home > Analytical Chemistry > Atomic Absorption ATOMIC ABSORPTION Atomic Absorption Spectrometry (AAS) Sampling Techniques for Atomic Absorption Spectrometry Light sources for atomic absorption     Quantitative Analysis by Atomic Absorption       Advantages and Disadvantages of Atomic Absorption Spectrometry and Graphite Furnace       Atomic absorption spectrometry (AAS) is an analytical technique that measures the concentration of an element by measuring the amount of light (intensity of light) that is absorbed - at a characteristic wavelength - when it passes through a cloud of atoms of this element. As the number of atoms in the light path increases, the amount of light absorbed increases in a predictable way. Modern atomic absorption spectrometry was introduced in 1955 as ...

Acid & Base Equilibria Home > Analytical Chemistry > Acid & Base Equilibria ACID & BASE EQUILIBRIA - STRONG ACIDS & BASES Ionic equilibrium - A general expression of the pH of a strong acid Strong acids and bases - Weak acid and bases - Dissociation constants and pK's pH of a strong acid – Examples     Strong Acids & Bases: pH Calculations involving mixtures of strong acids and bases       Chemical Equilibrium Calculations in Analytical Chemistry   Self-ionization of water - Autoionization of water - The ion product of water (kw)   ACID & BASE EQUILIBRIA - WEAK ACIDS & BASES Weak Acids and Bases – Calculate the pH of a weak acid (a general equation Solving Weak Acid and Weak Base pH problems Weak Acid Weak Base pH calculation solved example ...