L1 /
3
CH3041
QUANTITATIVE
ANALYSIS
Some terminology
• Matrix:
everything in the
sample except the analyte.
sample except the analyte.
• Analyte:
measured species
in a chemical analysis.
in a chemical analysis.
• Matrix effect:change
in
analytical response due to the
matrix rather than the analyte.
analytical response due to the
matrix rather than the analyte.
• Dilution factor: [final] = Vi / Vf x [initial]
where Vf = Vi + Vadded D.F. = Vi / Vf
where Vf = Vi + Vadded D.F. = Vi / Vf
• Interference:
spectral = signal overlap
chemical = reduces real signal
chemical = reduces real signal
• Accuracy :
difference between the
measured value and the true value.
measured value and the true value.
• Precision
: the size of the random error.
