Heavy Metals By Absorption Spectrometry

Practical 5 Heavy Metals by ducking spectroscopic analysis Contents fix -1 Introduction1 Procedure2 Pre-laboratory exercises2 Results and discussion3 Conclusion3 References3 Aim The coach of this practical is to draw the parsimonys of each of Cu, Pb and Cd in an isolated dissolving agent with the use of nuclear Absorption Spectrometry. Introduction Atomic Absorption Spectrometry or AAS is a spectrophotometric analysis proficiency that allows for some(prenominal) quantitative and qualitative determination of most divisions. all(prenominal) subdivisional metallic element absorbs ultraviolet light at a specific wavelength when hallucinating by heat; this is the basis of atomic absorption spectrometry The procedure involves passing known concentrations of the element in outcome through a nebulizer forming a mist. This mist is therefore aspirated into a flame forming gaseous atoms, elementary ions and molecular(a) species. A focused poli sh of ultraviolet light at a specific wavelength is direct at the sample, reduction in the intensity of the light is wherefore measured and converted to absorbance. By measuring the relationship amidst concentration and absorbance of known concentration solutions, beer-lamberts law can then be utilized to determine the concentration of the particular element present in both unknown solution.

Figure 1 Simplified block diagram of Atomic Absorption mass spectrometer Pre-laboratory exercises Dilution calculations Unknown solution dilution factor of ten. (for Cd analysis only) 10ml unknown solution 90ml 0.5M HNO3 regular solution 10ppm cadmiu! m sidestep 1 calculate masses of cadmium archetype solution require in 100ml samples of each of 0.8, 0.6, 0.4, 0.2ppm cadmium solutions. Concentration (ppm)| muckle of standard solution (ml) | 0.8| 8| 0.6| 6| 0.4| 4| 0.2| 2| Standard solution 100ppm Lead Table 2 Calculated volume of lead standard solution required in 100ml samples of each of 0.8, 0.6, 0.4, 0.2ppm...If you want to get a full essay, magnitude it on our website: OrderCustomPaper.com

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