Comprehensive Drug Testing Laboratory Practice Test 2026 – Your All-in-One Guide to Exam Success!

Calibration in LC-MS/MS is about creating a quantitative map between what the instrument reports (signal intensity) and the known amounts of analyte in a sample. By analyzing standards with known concentrations, you generate a calibration curve that shows how signal changes with concentration, and you fit a line or curve to that relationship. This curve lets you determine the concentration of unknown samples by interpolating their signal on the curve, ensuring accurate, precise quantitation within the established dynamic range. Calibration also helps account for day-to-day instrument variability and matrix effects, so results are comparable across runs. The other options describe activities not about translating signal into amount: verifying cleanliness, controlling who can access the instrument, or changing ionization efficiency aren’t how calibration enables quantitation.