sentence: More scans can take place each second.
sentences_before: Only those mass fragments are detected by the mass spectrometer.
sentences_after: Since only a few mass fragments of interest are being monitored, matrix interferences are typically lower. To improve the chances of reading a positive result correctly, the ion ratios of the various mass fragments are comparable to a known reference standard.
concept_name: scan
headings: Gas chromatography–mass spectrometry Analysis Selected ion monitoring
categories: Mass spectrometry Laboratory techniques