Instrumental Analysis Chapter 5 questions with verified
answers
A common application for this type of filter Ans✓✓✓ N M R
A composite of noise from the surroundings Ans✓✓✓ environmental
noise
A device that is used to change electric current in a circuit Ans✓✓✓
transistor
A digital procedure that is used to smooth out noise, enhancing the
signal to noise ratio Ans✓✓✓ boxcar averaging
A low pass filter reduces high frequency noise, but it has to be used
carefully because it can also Ans✓✓✓ damage signal
A tangent line is used to Ans✓✓✓ smooth the data
A way of getting rid of drift or flicker noise in an instrument Ans✓✓✓
modulation
An example of this is in Ans✓✓✓ p n doped semiconductors
,And delta f is the Ans✓✓✓ frequency bandwidth in hertz
Boxcar averaging assumes that the average of several adjacent points is
a better representative than Ans✓✓✓ any single point
Boxcar averaging averages or smooths data Ans✓✓✓ linearly in a
curve
But often it is Ans✓✓✓ more complex
difficult to predict
Can be used to block a a low frequency analog flicker noise Ans✓✓✓ a
high pass filter
Carries the information about the analyte that is of interest to the
scientist. Ans✓✓✓ signal
Chemical noise arises from a host of uncontrollable variables that affect
the _______________ of the system being analyzed Ans✓✓✓
chemistry
Computer methods to reduce noise Ans✓✓✓ title
, Data from repeated measurements can be stored in Ans✓✓✓ the
computer's memory
delta f is the _________________ of the circuits in the instrument
Ans✓✓✓ response time
Delta f is the Ans✓✓✓ bandwidth of frequencies
Different sources of environmental noise occur at different Ans✓✓✓
frequencies
Downsides of boxcar averaging Ans✓✓✓ some detail is lost in the
process
not good for rapidly changing signals
e is the Ans✓✓✓ charge on the electron 1.60 times 10 to the negative
19 coulombs
Environmental E M radiation can't penetrate the conductor where it
gets Ans✓✓✓ absorbed
Every wire in your instrument can act like an Ans✓✓✓ antenna
Examples of environmental noise Ans✓✓✓ all electromagnetic waves
answers
A common application for this type of filter Ans✓✓✓ N M R
A composite of noise from the surroundings Ans✓✓✓ environmental
noise
A device that is used to change electric current in a circuit Ans✓✓✓
transistor
A digital procedure that is used to smooth out noise, enhancing the
signal to noise ratio Ans✓✓✓ boxcar averaging
A low pass filter reduces high frequency noise, but it has to be used
carefully because it can also Ans✓✓✓ damage signal
A tangent line is used to Ans✓✓✓ smooth the data
A way of getting rid of drift or flicker noise in an instrument Ans✓✓✓
modulation
An example of this is in Ans✓✓✓ p n doped semiconductors
,And delta f is the Ans✓✓✓ frequency bandwidth in hertz
Boxcar averaging assumes that the average of several adjacent points is
a better representative than Ans✓✓✓ any single point
Boxcar averaging averages or smooths data Ans✓✓✓ linearly in a
curve
But often it is Ans✓✓✓ more complex
difficult to predict
Can be used to block a a low frequency analog flicker noise Ans✓✓✓ a
high pass filter
Carries the information about the analyte that is of interest to the
scientist. Ans✓✓✓ signal
Chemical noise arises from a host of uncontrollable variables that affect
the _______________ of the system being analyzed Ans✓✓✓
chemistry
Computer methods to reduce noise Ans✓✓✓ title
, Data from repeated measurements can be stored in Ans✓✓✓ the
computer's memory
delta f is the _________________ of the circuits in the instrument
Ans✓✓✓ response time
Delta f is the Ans✓✓✓ bandwidth of frequencies
Different sources of environmental noise occur at different Ans✓✓✓
frequencies
Downsides of boxcar averaging Ans✓✓✓ some detail is lost in the
process
not good for rapidly changing signals
e is the Ans✓✓✓ charge on the electron 1.60 times 10 to the negative
19 coulombs
Environmental E M radiation can't penetrate the conductor where it
gets Ans✓✓✓ absorbed
Every wire in your instrument can act like an Ans✓✓✓ antenna
Examples of environmental noise Ans✓✓✓ all electromagnetic waves
