The present contribution is focused on the evaluation of a high-speed triple quadrupole mass spectrometer, carried out under moderately-fast gas chromatography conditions (analysis time: 16.6 minutes). The mass spectrometric instrument can be operated under high speed gas chromatography conditions, in both full-scan (maximum scan speed: 20,000 atomic mass units/second) and multiple reaction monitoring modes (minimum dwell time: 0.01 seconds). Additionally, the mass spectrometric system can generate full scan and multiple reaction monitoring information, simultaneously and rapidly. A headspace solid-phase microextraction-fast gas chromatography-triple quadrupole mass spectrometry approach was developed for the: I) qualitative untargeted analysis of brewed tea volatiles, and II) multiple reaction monitoring quali/quantitative analysis of targeted ones (also in brewed tea), namely thirty phytosanitary contaminants. The performance of the triple quadrupole instrument was satisfactory both for identification and quantification purposes. Furthermore, the method sensitivity was more than sufficient for the requirements of current legislation. Method validation, related to the multiple reaction monitoring analysis, was performed considering: precision of quantification data (maximum coefficient of variation value: 12.0%) and quantification/qualification ion ratios (maximum coefficient of variation value: 14.4%), along with limits of detection (4 parts per trillion-5 parts per billion range) and quantification (14 parts per trillion-16 parts per billion range).