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UPSC Combined Geo-Scientist

Chemist

  • 3 descriptive papers
  • 200 marks each
  • 3 h per paper

Mains Paper III covers analytical and organic chemistry.

UPSC Combined Geo-Scientist, Mains · 2019 · Mains Paper III

Q4(e). Background-correction methods

Question

Explain two-line, background and Zeeman correction methods for matrix interference.

Answer in brief

They estimate non-analyte optical attenuation and separate it from atomic absorption; they do not correct every matrix effect.

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The full model answer

As written for the answer booklet: the diagram carries the working, the lines stay short. Read here only; it is not offered as a download.

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Read the whole 2019 solution2019 question paper

CoversBackground-correction methodsAtomic spectroscopy

All parts of Question 4