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9 Cards in this Set

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  • Back
Which of the following lamps provides a continuous spectrum of radiant energy in the visible, near IR, and UV regions of the spectrum?

A. Tungsten-filamnet
B. Hydrogen
C. Deuterium
D. Mercury Vapor
A. Tungsten-filament
Which of the following isolates light within a narrow region of the spectrum?

A. Photomultiplier
B. Monochromator
C. Photovoltaic cell
D. Detector
B. Monochromator
A photomultiplier tube may be described by all the following except:

A. Rapid response time
B. Must be shielded from stray light
C. Cannot be used with a chopper
D. Amplifies current significantly
C. Cannot be used with a chopper
All the following statements about a photomultiplier tube are true except:

A. Converts radiant energy (light) to electrical energy (current)
B. Amplifies the initial signal received
C. Has a very rapid response time
D. Is compsoed of an iron plate and a layer of selenium
D. Is composed of an iron plate and a layer os selenium
Which type of photodetector has a linear array that allows it to respond to a specific wavelength resulting in complete UV/visible spectrum analysis?

A. Photomultiplier tube
B. Phototube
C. Photodiode
D. Photodiode array
D. Photodiode array
When performing spectrophotometer quality control checks, what is the holomium oxide gass filter used to assess?

A. Linearity
B. Stray light
C. Absorbance accuracy
D. Wavelength accuracy
D. Wavelength accuracy
In spectrophotmetric analysis, what is the purpose of the reagent blank?

A. Correct for interfering chromogens
B. Correct for lipemia
C. Correct for protein
D. Correct for color contribution of the reagents
D. Correct for color contribution of the reagents
All the following are true of bichromatic analysis except:

A. Absorbance measured at the peak using two wavelengths
B. Eliminates background interference
C. Concentration determined from difference in two measured absorbances
D. Functions as a refernce blank for each sample
A. Absorbance measured at the peak using two wavelengths
The bandpass of a spectrophotometer is 10 nm. If an instrument is set at 540 nm, the wavelengths that are permitted to impinge on the sample will be within what wavelength range?

A. 530-540 nm
B. 530-550 nm
C. 535-545 nm
D. 540-550 nm
C. 535-545 nm