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23 Nov 2019

How do you determine flame temperature in a Atomic Absorption Spectrometry (AAS) from flame composition? The composition is 0.0026

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Bunny Greenfelder
Bunny GreenfelderLv2
7 Jun 2019

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Related questions

Which of the following statements is true regarding the effect of flame temperature on atomic absorbance and atomic emission spectroscopy?

I. varying the flame temperature by 10 K hardly affects the ground-state population on the analyte and would not noticeably affect the analyte signal in the atomic absorption.

II. Varying the flame temperature by 10 K hardly affects the excited-state population of the analyte and would not noticeably affect the analyte signal in atomic emission.

III. Varying the flame temperature by 10 K affects the ground-state population of the analyte and will noticeably affect the analyte signal in atomic absorption

IV. Varying the flame temperature by 10 K affects the excited-state population of the analyte and will noticeably affect the analyte signal in the atomic emission.

A) I and II

B) I and IV

C) II and III

D) III and IV

E) II and IV

Consider Potassium atoms in a flame atomizer. The 4s to 40transition has a spectral doublet at 766 nm. (nominal - average ofall 4p states)

  1. What is meant by the term "doublet" in the description, and whydoes this occur in potassium?
  2. Calculate the ratio of atoms in the 4p states (all three) tothose is the 4s state for a flame temperature of 2800K
  3. Potassium can be determined by flame-AES or flame-AAS, but thesignal in Flame-AES is very noisy. Explain why this is so and alsowhy ICP-AES acheives a less noisy signal.

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