Determination of sodium and potassium by flame photometry lab report
- Exercise 6: Flame Photometer
- Determination of the concentration of potassium ion using Flame Photometry
Exercise 6: Flame Photometer
When a solution containing cations of sodium and potassium is spayed into flame , the . CHE Lab Handout, Exp 9 Flame photometric Analysis of Sodium.and
Photoelectric flame photometry, a branch of atomic spectroscopy is used for inorganic chemical analysis for determining the concentration of certain metal ions such as sodium, potassium, lithium, calcium, Cesium, etc. In flame photometry the species metal ions used in the spectrum are in the form of atoms. The basis of flame photometric working is that, the species of alkali metals Group 1 and alkaline earth metals Group II metals are dissociated due to the thermal energy provided by the flame source. Due to this thermal excitation, some of the atoms are excited to a higher energy level where they are not stable. The absorbance of light due to the electrons excitation can be measured by using the direct absorption techniques. The subsequent loss of energy will result in the movement of excited atoms to the low energy ground state with emission of some radiations, which can be visualized in the visible region of the spectrum. The absorbance of light due to the electrons excitation can be measured by using the direct absorption techniques while the emitting radiation intensity is measured using the emission techniques.
When a solution containing cations of sodium and potassium is spayed into flame, the solvent evaporates and ions are converted into their atomic state. Relaxation of the excited atoms to the lower energy level is accompanied by emission of light photons with characteristic wavelength Na: nm, K: nm. Intensity of the emitted light depends on the concentration of particular atoms in flame. Glass pipettes: 10 ml. Measuring cylinder: 50 ml. Solution preparation.
The purpose of this experiment was to determine the concentrations of sodium and potassium ions in solution through flame-photometric analysis. When excited in flame i. The intensity of the light emitted, i. As the name of the technique suggests, flame photometric analysis counts the number of photons emitted per unit time and at one particular wavelength from the flame in which a solution containing potassium and sodium ions is dispersed in aerosol spray form. The instrument does this by utilizing photon-sensors and photomultipliers. This simple concept is the basis for designing complex instruments that function on the same photometric idea such as atomic emission spectroscopy. We were given 6 solutions of unknown concentration, and, using the linear fit for the FLM readings of the solutions of known concentration, we were supposed to find, or calculate to best approximation, the concentration of sodium and potassium of these 6 solutions.
A traditional and simple method for determining sodium and potassium in In this practical (Experiment A) you will calibrate a flame photometer using .. Students who feel unwell during a practical should report to the lecturer in charge . It is.
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Determination of the concentration of potassium ion using Flame Photometry
instrumental analytical methods experiment 1 - flame-photometric analysis - Free download as PDF File .pdf), Text File .txt) or read online for Lab Report sodium. potassium. Flame photometer reading (FLM). Sodium concentration.
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