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 absorption spectrophotometry:
Atomic absorption spectrophotometry (AAS) concerns the absorption of radiation by the atomised analyte element in the ground state. The atomisation is achieved through the thermal energy of the flame or electrothermally within an electrical furnace. The wavelength(s) of the radiation absorbed and the extent of the absorption form the basis of the qualitative and quantitative determinations respectively. As atomic absorption spectrophotometry is not an absolute method of analysis, the routine analytical methodology for quantitative determinations using AAS is based on calibration method. Besides that the internal standard method and standard addition methods are also employed.
A typical atomic absorption spectrophotometer consists of a source delivering the characteristic resonant radiation of the analyte, an atom reservoir into which the analyte is introduced and atomised, a monochromator, a detector and a readout device. In a typical flame atomic absorption spectrophotometric determination, the radiation from a hollow cathode lamp (or electrodeless discharge lamp) is made to fall on the sample of the analyte aspirated within the flame (or in the cuvette of an L'vov graphite furnace), while a part of it is absorbed. A transmitted radiation is then dispersed through a monochromator and sent to the detector. The detector output is suitably processed and is displayed by appropriate readout device. Like, UV-VIS spectrophotometers the atomic absorption spectrophotometers are also of two types' viz., single beam atomic absorption spectrophotometers and double beam atomic absorption spectrophotometers.
Inductive effect - Relative reactivity of aldehydes and ketones The comparative re-activities of aldehydes and ketones in nucleophilic addition reactions might be attributed to
how to make assignmant//
de-Broglie equation is: (1) n γ= 2d sin θ (2) E= hv (3) E= mc 2 (4) γ= h/ mv Ans: γ= h/ mv
explain galvanic potentiol differnce
#space lattice, unit cell, calculation of particles per unit cell, laws of crystallography, symmetry elements in crystals, derivation of braggs equation#
what are antifertility drugs?
Antihistamines: Antihistamines are chemical substances that abolish/diminish the major actions of histamine released in the body and therefore avoid the allergic effects. Alter
Q. Describe the Half -Life property of radioactive decay? Ans. The decay of a nucleus is a random event. It is impossible to predict which nucleus will decay and when.
#IONISATION ENERGY OF ELEMENTS..
n-propyl acetate evaporates rapidly when exposed to air,but water does not.Explain
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