SPECTROSCOPY EXAM QUESTIONS AND ANSWERS #5
1. Precision Repeatable, reliable, getting the
same
measurement each time
2. Accuracy a bias in the measurement system
3. Classical methods Qualitative and quantitative
analytical chemistry
ex. titration, and acid-base
chemistry
4. selectivity/specificity coeflcient of selectivity is used to
de- fine selectivity
kA,B= mB/mA
selectivity coeflcient for A with
respect to B LOVEE YOU
5. Instrumental methods use instruments to gather
analytical information
ex. UV-VIS, FTIR, AAS, NMR
6. Detection Limit (DL)/ Indicate the minimum analyte
Quantitation "lower limit of con- centration that can be
detection" measured at a known confidence
level
7. Preconcentration often required to bring the
analyte to a higher concentration
prior to analy- sis
8. Absolute standard deviation, relative variation,
standard deviation, coefficent of variance
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22
,Precision
9. Derivatization the analyte is chemically modified
to make it easier to detect or
seperate
2/
22
, 10. Absolute systematic error, relative Bias
systematic error
11. species (both singular and plural) chemicals (of interest)
12. Calibration sensitivity, analytical sensitivity Sensitivity
13. Interferences species other than the analyte of
in- terest that attect the
analysis
-increases or decreases the
response of the analytical
method
-could make it appear that there
is more/or less analyte thats is
actually present
14. Blank plus three times standard Detection limit
deviation of the blank
15. masking transform an interfering compound
into a form that is not detected
16. Concentration limit of quantitation Dynamic range
(LOQ) to concentration limit of
linearity (LOL)
17. chemical analysis measure the concentration of
analyte in several identicial
aliquots
-perform replicate measurements
18. Coefficient of selectivity selectivity
19. calibration curve analytes with ditterent
3/
22
1. Precision Repeatable, reliable, getting the
same
measurement each time
2. Accuracy a bias in the measurement system
3. Classical methods Qualitative and quantitative
analytical chemistry
ex. titration, and acid-base
chemistry
4. selectivity/specificity coeflcient of selectivity is used to
de- fine selectivity
kA,B= mB/mA
selectivity coeflcient for A with
respect to B LOVEE YOU
5. Instrumental methods use instruments to gather
analytical information
ex. UV-VIS, FTIR, AAS, NMR
6. Detection Limit (DL)/ Indicate the minimum analyte
Quantitation "lower limit of con- centration that can be
detection" measured at a known confidence
level
7. Preconcentration often required to bring the
analyte to a higher concentration
prior to analy- sis
8. Absolute standard deviation, relative variation,
standard deviation, coefficent of variance
1/
22
,Precision
9. Derivatization the analyte is chemically modified
to make it easier to detect or
seperate
2/
22
, 10. Absolute systematic error, relative Bias
systematic error
11. species (both singular and plural) chemicals (of interest)
12. Calibration sensitivity, analytical sensitivity Sensitivity
13. Interferences species other than the analyte of
in- terest that attect the
analysis
-increases or decreases the
response of the analytical
method
-could make it appear that there
is more/or less analyte thats is
actually present
14. Blank plus three times standard Detection limit
deviation of the blank
15. masking transform an interfering compound
into a form that is not detected
16. Concentration limit of quantitation Dynamic range
(LOQ) to concentration limit of
linearity (LOL)
17. chemical analysis measure the concentration of
analyte in several identicial
aliquots
-perform replicate measurements
18. Coefficient of selectivity selectivity
19. calibration curve analytes with ditterent
3/
22
