Q1 · 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: (1) Hg lamp, nitric oxide flame (2) Hg lamp, graphite furnace (3) Hollow cathode lamp, graphite furnace (4)Hollow cathode lamp; acetylene-nitric oxide flame
(a)1 and 2
(b)2 and 3
(c)1 and 3
(d)3 only
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. CSIR DEC 2014
Explanation as extracted from the printed page; notation may be imperfect.
Study loop for Analytical Chemistry