Q38 · CSIR NET Chemistry, December 2015
Paper: CSIR NET December 2015 · Subject: Inorganic Chemistry · Chapter: Analytical Chemistry · Topic: Analytical Chemistry – General · Marks: 2 · Difficulty: Medium
Pick the correct statements about Atomic Absorption Spectrometry (AAS) from the following: A. Hg lamp is not a suitable source for AAS B. Graphite furnace is the best atomizer for AAS C. Non-metals cannot be determined with AAS D. AAS is better than ICP-AES for simultaneous determination of metal Ions.
(a)A, B and C
(b)B, C and D
(c)C, D and A
(d)D, A and B
Answer
Answer: A ✓ checked by 4AB · confidence medium
Explanation
AAS needs element-specific line sources (hollow cathode lamps), and the graphite furnace gives the best sensitivity. Non-metals absorb in the vacuum UV, so they are not determined. ICP-AES, not AAS, is the multi-element technique. A, B and C (a).
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