Question

In: Chemistry

Consider the following statements as they apply to radiation sources and atomic spectroscopy. Decide if each...

Consider the following statements as they apply to radiation sources and atomic spectroscopy. Decide if each is true or false.
True or False  Room lights contribute significantly to the background noise in AAS.
True or False  Photons transmitted through the sample are detected in AES.
True or False  The fill gas in a hollow cathode lamp is inert and does not play an important role in the emission of characteristic radiation from a hollow cathode lamp.
True or False  Neutral Ca atoms, singly charged Ca ions, and doubly charged Ca ions each have their own characteristic emission energies.
True or False  A hollow cathode lamp is used as an AAS source because its emission lines are very narrow.

True or False  A CCD detector can measure all wavelengths (167-785 nm) simultaneously.

True or False  A radial view ICP-OES is more sensitive than an axial view instrument, primarily because the sample pathlength is longer.

True or False  In ICP, the sample is atomized in an argon plasma that is about 3,000 K.

True or False  Typically the detection limit for ICP-OES are in the low ppb range.

True or False  It is very important to matrix match samples and standards in order to achieve accurate results in an ICP-OES analysis.

Solutions

Expert Solution

True / False statements

True :  Room lights contribute significantly to the background noise in AAS.
True :  Photons transmitted through the sample are detected in AES.
False :  The fill gas in a hollow cathode lamp is inert and does not play an important role in the emission of characteristic radiation from a hollow cathode lamp.
True :  Neutral Ca atoms, singly charged Ca ions, and doubly charged Ca ions each have their own characteristic emission energies.
True :  A hollow cathode lamp is used as an AAS source because its emission lines are very narrow.

True :  A CCD detector can measure all wavelengths (167-785 nm) simultaneously.

True :  A radial view ICP-OES is more sensitive than an axial view instrument, primarily because the sample pathlength is longer.

True :  In ICP, the sample is atomized in an argon plasma that is about 3,000 K.

True :  Typically the detection limit for ICP-OES are in the low ppb range.

True :  It is very important to matrix match samples and standards in order to achieve accurate results in an ICP-OES analysis.

queen_honey_blossom answered 2 years ago
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