4AB › Chemistry PYQ › CSIR-NET › June 2015 › Q1Q1 · CSIR-NET Chemistry, June 2015 Paper: CSIR-NET June 2015 · Subject: Inorganic Chemistry · Chapter: Analytical Chemistry · Topic: Analytical Chemistry – General · Marks: 2 · Difficulty: Medium
The pair of light source and atomizer resulting highest sensitivity to atomic absorption spectrometric measurement is:
(a) Hg lamp, nitric oxide flame
(b) Hg lamp, graphite furnace
(c) Hollow cathode lamp, graphite furnace
(d) Hollow cathode lamp; acetylene-nitric oxide flame
Answer Answer: C ✓ checked by 4AB · confidence high
Explanation AAS needs the element-specific line source, a hollow cathode lamp. A graphite furnace keeps the whole sample in the light path for longer and gives the highest sensitivity (option 3).
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