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.
A solution is made by dissolving30 g of a non-volatile solute in 90 g of water. It has a vapour pressure of 2.8 kPa at 298 K. At 298 K, vapour pressure of pure water is 3.64 kPa
What is Banana bond? Diborane contains how many banana bonds Ans) In Diborane B-H-B, bridge, which is produced by the sharing of two electrons, is known as banana bond or Tau bo
In neutral atom, which particles are equivalent: (1) P + e + (2 ) e - e + (3) e -, P + (
Boiling point -physical characteristics of carbonyl compound The boiling points of aldehydes and ketones are high as compared to those of non polar compounds (hydrocarbons) or
Hydrogen Peroxide Hydrogen peroxide is the other important hydride of oxygen. The oldest method of its preparation is by the action of dilute sulphuric acid on barium peroxide
I don''t understand the concept of normality and gram equivalent
An Lewis acid-base dissociation of the bromide-essentially an SN1 reaction-gives an a-hydroxy carbo-cation, which is, by resonance, also the conjugate acid of acetophenone. Deproto
defnition and example
Q. Explain Preservation by Preservatives? Preservatives, as you may already know, belong to a class of food additives that extend shelf life by inhibiting microbial growth, o
why a small amount of an acid is added while preparing solution of potassium dichromate?
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