主题：原子发射光谱的几个英文题

几个英文题,有兴趣的可以看看,答案在第3铁,

1.Atomic-emission spectroscopy (AES) is an analytical method for quantitating:

A:Elements in solids or liquids.
B:Atmospheric gases.
C:Organic molecules in aqueous solution.
D:Pigs in a poke.


2.The purpose of the high-energy flame, discharge, or plasma source is to:

A:Desolvate the sample.
B:Atomize the sample.
C:Excite the analyte atoms.
D:All of the above.

3.Atomic emission originates from high-lying energy levels. Atoms in an inductively-coupled plasma are promoted to these higher levels by:

A:Absorbing light from the plasma.
B:An electric current from the RF generator.
C:Collisions with other atoms and ions in the plasma.
D:Tunneling

4.Compared to atomic-absorption (AAS) spectroscopy, atomic-emission spectroscopy (AES) has the advantage of providing:

A:Simultaneous multi-element analysis.
B:Much better precision.
C:Analysis of volatile metals.
D:Analysis of molecules.