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(8) lb) (0) Calculate the resolution required to resolve peaks for A1 = 410 nm and A2 which has a wavenumber of 24100 cm-1 (3 marks) ICP-OES and AA can be complimentary techniques. Discuss this statement by comparing and contrasting both techniques along with their applications. (12 marks) Sample introduction can often be a limiting step for atomic absorption. Explain this statement with reference to various sample introduction methods for atomic absorption (10 marks) (25 marks) An interference lter is to be constructed for isolation of an absorbance band at 1600 cm'l. If it is based on rst order interference what should the thickness of the dielectric layer be? Note the refractive index = 1.25. Also what other wavelengths would be transmitted? (6 marks) Compare and contrast an echelle monochromator from an echelette monochromator. Illustrate your answer. (14 marks) Why are photomultiplier tubes not suitable for the IR region? List some of the ideal characteristics of transducers for the IR region