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.
p-orbitals of an atom in presence of magnetic field are: (1) Two fold degenerate (2) Non degenerate (3) Three fold degenerate (4) None of these Ans: Non degenerate
solvent rates on the rate of reaction
How To Develop A New Product The process of developing a new product comprises three phases, namely formulation or recipe development, standardization of processing methods,
Q. Preparation of hot souffle ? i) Melt 12 g butter in a saucepan. Add 12 g flour and stir cook for 1-2 minutes. ii) Gradually add ¼ cup of scalded milk stirring continuou
Question 1: (i) What are the main physical properties of hydrogen sulphide? (ii) Which occupational group of workers is often exposed to hydrogen sulphide? (iii) O
How many unpaired electrons are present in cobalt [Co] metal: (1) 2 (2) 3 (3) 4 (4) 7 Ans: 3
MOLE CONCEPT
Semisynthetic polymers These polymers are mainly derived from naturally taking place polymers by chemical changes. Since cellulose is naturally taking place polymers, cellulose
The only nonradioactive isotope of fluorine has 9 protons and 10 neutrons. a. What is its mass number. b. Write the full symbol of this atom.
Q. Show diffrent type of Ligands? Ligands which contain one donor atom are called monodentate the donor atom may contain One or more than one lone pairs of electrons. The l
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: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd