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Sch 404: Instrumental Methods (Open Learning) Question Paper

Sch 404: Instrumental Methods (Open Learning) 

Course:Bachelor Of Science

Institution: Kenyatta University question papers

Exam Year:2011



INSTRUCTIONS:
Answer ALL questions.
Q.1 a) Flame atomic absorption spectroscopy is a popular technique for the
determination of elements.
i) Using calcium chloride, describe the process taking place in the
flame.
ii) Discuss the chemical interferences experienced and how they can
be minimized.
iii) Describe two non-flame procedures used to analyze elements
(12 marks)
b) i) Quantitative analysis using UV/Visible spectrophotometry is based
on Lambert-Beer’s Law. State the law and explain why the law does not work at high concentrations. (6 marks)
c) i) Using a diagram, explain the difference between single-beam and
double-beam spectrophotometers.
ii) Briefly discuss the main parts of a UV-Vis spectrophotometer
(10 marks)
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