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Quantitative elemental analysis:
The instrument used for AFS consists of atom reservoir that might be a flame or a furnace etc., a basic source emitting the features absorption radiation of the element being determined, a monochromator, detector, signal processor and readout device. The basic source is commonly a hollow cathode lamp or a tuned laser.
Atomic fluorescence spectrometry is meaningful in study of electronic structure of atoms and in quantitative elemental analysis. Applications involves determination of Pb, Hg, Cd, As (III), As (V) Sb(III), Sb(V), Se(IV,VI), etc within clinical, environmental, geological and metallurgical, pharmaceutical and petrochemical samples. The major benefits of fluorescence measurements as compared to absorption measurements are the greater sensitivity as the signal has extremely low background and lesser interferences. It does suffer from the interference from matrix emission, oxide creation and scattering because of organic solvents but not as severely as the other atomic spectrometric methods.
Types of spectral interferences: While a quantitative analysis using a standard calibration curve is carried out, the calibration plot of emission intensity vs concentration o
solvent rates on the rate of reaction
Physical properties of Tri-halides (i) Tri-halides is a sweet smelling colourless liquid. (ii) Tri-halides is heavy liquid. The density of it is 1.485. It boils at 61°C.
Uses of methanol - Uses of monohydric alcohol (1) Methanol is extremely important industrial starting material for making formaldehyde, acetic acid and other chemicals. (2)
Q. Show the Structure of sulphuric acid? Theoretical considerations require that the reaction be carried out at low temperature and high pressure. However, at low temperature,
Copper crystallizes into a FCC structure and the unit cell has length of edge 3.61 x10-8 cm. Calculate the density of copper if the molar mass of Cu is 63.5 g
Sketch the various n-butane and discuss their relative stabilities.Draw the potential energy curve as a function of torsion angles.
classification
preparation reaction of esters
Why is the total energy of a many-electron atom not equivalent to the sum of the orbital energies for every electron?
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