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Contaminant analysis in complex matrices

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Quiz: WHAT DID YOU LEARN?

In trace analysis, the main source of error in the analytical result is

Chromatographic detection
Presence of impurities in the extraction solvent
Incomplete extraction of the contaminant
Sample heterogeneity

A mass spectrometer

Is the most sensitive detector
Provides information on the structure of the molecules analyzed
Identifies all the contaminants present in the sample being analyzed
Always gives a reliable analytical result

Which of these elements is not sufficient to confirm the presence of a molecule?

The chromatographic retention time
The area of the chromatographic peak
The mass spectrum
The repetition of the analysis in the same conditions

1 ppb corresponds to a concentration of

1 µg/kg
1 mg/kg
1 ng/mg
1 ng/g

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