Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Atomic fluorescence spectrometry:
In atomic fluorescence spectrometry, the gaseous atoms acquired through flame or electrothermal atomisation are excited to higher energy levels through absorption of the electromagnetic radiation and the fluorescence emission from these excited atoms is measured. A fluorescence emission could occur by different pathways. Therefore, we have various types of atomic fluorescence transitions. The general types of atomic fluorescence transitions are termed as resonance fluorescence, Stokes direct line fluorescence, stepwise line fluorescence, two step excitation or double resonance fluorescence, sensitized fluorescence and thermal fluorescence. Of these, the thermally assisted fluorescence and sensitized fluorescence commonly are not employed for analytical reasons.
The intensity of the fluorescence radiation is measured at right angles to the direction of incident radiation and is associated to the concentration of the element present, creating the basis of quantitative analysis. In quantitative atomic fluorescence spectrometric determinations the instrument is commonly standardised through a calibration curve. The graph is drawn among the logarithms of the intensity of atomic fluorescence signal versus the log of analyte concentration. The linearity of like curves extends over 3 to 5 sequences of magnitudes. Thus, at higher concentration, linearity is lost because of self absorption.
Write the maximum possible coordination number of an atom in an hcp crystal structure of an element? Illustrate the formula relating pressure of a gas with its mole fraction in
#space lattice, unit cell, calculation of particles per unit cell, laws of crystallography, symmetry elements in crystals, derivation of braggs equation#
how do we test for functional groups in chemistry lab
how to determine the percentage of association or dissociation in a solution?
Uses of Proteins (a) Proteins constitute as necessary part of our food. Meat, eggs, fish, cheese offer proteins to human beings. (b) In textile: Casein (a milk protein) is u
define scale and sludge
Describe Hall Effect? Briefly discuss physical origin and uses of Hall Effect? Ans: If a conducting bar is placed in a magnetic field B ⊥ to its axis and if a current flow
Q. The pressure in a liquid droplet of radius r is greater than the pressure of the surrounding equilibrated gas phase by a quantity 2 =r, where is the surface tension. (a) Cons
Uses of Phenol - Hydrocarbon Phenol is extensively used in industry. The important applications of phenol are (i) Phenol is used as an antiseptic in soaps, lotions and ointm
the given solution contains 2.5g of laundry soap dissolved per 250 cubic cm.determine the amount of free alkali in 350 cubic cm.
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd