Which working curve would be least likely to be observed for ICP emission spectr
ID: 527205 • Letter: W
Question
Which working curve would be least likely to be observed for ICP emission spectrochemical analysis of iron in fresh water? What is the mechanism that produces the high temperatures in an inductively coupled plasma? (A) The argon gas reacts with oxygen from the air, releasing energy that heats the gas. (B) The oscillating magnetic field causes polar water molecules from the sample solutions to move fast and collide with other particles, heating them up. (C) Free electrons and argon ions oscillate in the radio frequency magnetic field and collide with other gas phase particles, transferring energy to them and heating them up. (D) The quartz in the torch absorbs the radio frequency radiation from the coil and heats up. The heat is transferred to the argon gas and the solutions as they pass through the torch. An atomic absorption spectrometer is equipped with both, a flame atomizer and a graphite furnace. Which combination of precision and sensitivity is correct? Better precision (A) flame atomizer (B) graphite furnace (C) graphite furnace (D) flame atomizer Better sensitivity graphite flame atomizer graphite furnace flame atomizerExplanation / Answer
16)
withy increase in concentration there should be increase in signal intensity. So option -D is less likely to happen.
17)
In ICP, coupling is acheived by generating a magnetic field by passing a high frequency electric current through a cooled induction coil. The free electrons and argon gets collide and energy is transfered.
correct option - C
18)
Graphite furnace - MORE SENSITIVITY
Flame atomizer - Better precision.
correct answer -(A)
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