Wavelength selector in atomic absorption spectrometer will limit the radiation absorbed by a sample to a certain wavelength. Give a common wavelength selector used in an atomic absorption spectroscopy (AAS). (а) (b) Discuss the reasons why device stated in (a) is important to improve the sensitivity of an AAS. (c) Differentiate between graphite furnace and flame furnace used in an AAS. 2.

Wavelength selector in atomic absorption spectrometer will limit the radiation absorbed by a sample to a certain wavelength. Give a common wavelength selector used in an atomic absorption spectroscopy (AAS). (а) (b) Discuss the reasons why device stated in (a) is important to improve the sensitivity of an AAS. (c) Differentiate between graphite furnace and flame furnace used in an AAS. 2.

Principles of Instrumental Analysis

7th Edition

ISBN:9781305577213

Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

Publisher:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

Chapter7: Components Of Optical Instruments

Section: Chapter Questions

Problem 7.15QAP

See similar textbooks

Similar questions

Flame Atomic Absorption Spectroscopy (FAAS) method is selected due to its wide applicability for metal ion analysis in drinking water samples. Discuss how can we determine the concentration of selected heavy metals (Cu and Cr) in the unknown tap water sample.
Flame Atomic Absorption Spectroscopy (FAAS) method is selected due to its wide applicability for metal ion analysis in drinking water samples. Title: Determine the concentration of selected heavy metals (Cu and Cr) in the unknown tap water sample. Question: Discuss the safety and precautions during the experiment.
Graphite-Furnace atomic absorption spectroscopy (Furnace-AAS) is a useful technique in analytical chemistry, but requires background correction. (i) Describe how atomisation is achieved in Furnace-AAS and state two advantages of this method over flame methods. (ii) Describe, using a suitable diagram, how background correction can be achieved by using source modulation.
Explain the process of isolation and characterization of Enalapril in tablets for the commercial drug vasotec, by way of extraction of the solid phase and spectroscopy of infrared..
You are working with metal thiocyanate complex, M(SCN)+, with a molar absorptivity constant, ε, of 2700 cm−1M−1 at 500 nm. If you are is using a 1.00 cm cuvette for absorbance measurements at 500 nm, what concentration of M(SCN)+ will give an absorbance value of 0.280?
(i) The detection of Mn by graphite furnace atomic absorption spectrometry (GFAAS) is sensitive to the presence of aluminium ions Al3+ which may form refractory compounds such as MnAl2O4. Comment on the possible impact of this compound on the measurements and what action may be taken to minimize this. (ii) Write a brief note on the best practice for the preparation of a calibration curve. (iii) Atomic absorption spectroscopy (AAS) is a powerful technique for the analysis of trace amounts of metals. Describe the two common atomic absorption methods used in the lab with reference to their comparative strengths and weaknesses.
Determine the appropriate LED colour and wavelength range that should be used tomeasure the absorbance of red, blue and yellow dye solutions. I think it has something to do with complimentary colours but im not sure
Atomic Spectroscopy (a) In terms of spectral shape, how are atomic spectra different from molecular spectra? What is the source of this difference? (b) Describe the decision-making process for picking a line for atomic emission analysis of a given analyte. (c) For quality assurance, spike recovery is not sufficient to establish confidence in an analytical procedure. Explain this statement. What should be done instead to demonstrate satisfactory performance of an instrumental method (including elemental analysis). (d) Find a literature example of atomic spectroscopy used for elemental analysis. State the operating conditions with sufficient detail to reproduce the analysis; Please answer very soon will give rating surely All questions complete Answer needed Please help me
Define mass spectroscopy and the underlying principle/background of its method for characterizing samples.
A calibration curve for the colormetric determination of phosphorusin urine is prepared by reacting standard solutions of phosphate withmolybdenum (IV) and reducing the phosphomolybdic acid complex toproduce the characteristic blue color. The measured absorbance A isplotted against the concentration of phosphorus. From the followingdata, determine the linear least-squares line and calculate thephosphorus concentration in the urine sample.a. Use the method of least squares to determine the equation of the line in the form of y=[m(±sm)]x +[b(±sb)]. Use Excel and do the calculations ‘by hand’. Check your answer using the linest function onExcel.b. Construct a graph showing the experimental data and the calculated straight line.c. An unknown (single sample) gave an observed absorbance of 0.735. Calculate the concentration ofphosphorus and estimate its uncertainty.
The alkali and few alkaline earth metals impart colour to a flame, a property used in the flame test experiment, however, Be and Mg do not impart colour to flame. Give reason?
Explain IR spectroscopy as a characterization technique.