ABC26IN0018 · Analytical Chemistry

Subject: Inorganic Chemistry · Chapter: Analytical Chemistry · Topic: Analytical Chemistry – General · Exam: CSIR-NET JUNE 2015 · 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 (as printed): C
Explanation
Increase of intensity of light used increases fluorescence as the fluorescence life-time increases. Molar absorptivity increases absorbance which further enhances fluorescence.

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