Chem 550 - Chapter 1- Introduction to Instrumental
Analysis questions with verified answers
Analytical Sensitivity (gamma) Ans✓✓✓ m- slope of calibration currve
s(s) standard deviation of the measurement
Bias Ans✓✓✓ u- the population mean for the concentration of an
analyte in a sample
t- is the true value
delta- bias
Concentration Calculation Ans✓✓✓ cx- concentration unknown
b- intercept
vs-volume known
cs- concentration known
vx - volume of unknown
Data Domains- Name Non-electrical and electrical domains Ans✓✓✓
Non-electrical Domains:
- length density, chemical composition, intensity of light, pressure, eyc.
-measurement begins and ends in nonelectrical domains.
Electrical Domains:
, -analog: the magnitude of one of the electrical quantities- voltage,
current, charge, or power
-continuous in both amplitude and time
-time: the time-dependent signal flutuation, rather than as the
amplitudes of the signals.
-digital: a two level schol (on/off or high/low state only)
Determining unknown concentration Ans✓✓✓ c- concentration
b- is the y- intercept of y=mx+b
y- response of the unknown
m- slope
Dynamic Range Ans✓✓✓ extends from the lowest concentration at
which quantitative measurements can be made (limit of quantitation,
LOQ) to the concentration at which the calibration curve departs from
linearity by a specified amount (limit of linearity, LOL).
-Usually 5% is considered the upper limit.
-deviations are common at high concentrations because the nonidea
detector responses or chemical efforts.
Examples of Instrumennt Components Ans✓✓✓
External Standard Calibration Ans✓✓✓ -contain the analyte in know
concentrations
Analysis questions with verified answers
Analytical Sensitivity (gamma) Ans✓✓✓ m- slope of calibration currve
s(s) standard deviation of the measurement
Bias Ans✓✓✓ u- the population mean for the concentration of an
analyte in a sample
t- is the true value
delta- bias
Concentration Calculation Ans✓✓✓ cx- concentration unknown
b- intercept
vs-volume known
cs- concentration known
vx - volume of unknown
Data Domains- Name Non-electrical and electrical domains Ans✓✓✓
Non-electrical Domains:
- length density, chemical composition, intensity of light, pressure, eyc.
-measurement begins and ends in nonelectrical domains.
Electrical Domains:
, -analog: the magnitude of one of the electrical quantities- voltage,
current, charge, or power
-continuous in both amplitude and time
-time: the time-dependent signal flutuation, rather than as the
amplitudes of the signals.
-digital: a two level schol (on/off or high/low state only)
Determining unknown concentration Ans✓✓✓ c- concentration
b- is the y- intercept of y=mx+b
y- response of the unknown
m- slope
Dynamic Range Ans✓✓✓ extends from the lowest concentration at
which quantitative measurements can be made (limit of quantitation,
LOQ) to the concentration at which the calibration curve departs from
linearity by a specified amount (limit of linearity, LOL).
-Usually 5% is considered the upper limit.
-deviations are common at high concentrations because the nonidea
detector responses or chemical efforts.
Examples of Instrumennt Components Ans✓✓✓
External Standard Calibration Ans✓✓✓ -contain the analyte in know
concentrations
