The Thermo Scientific DFS High Resolution GC/MS Mass System is the highest performance mass spectrometer that has ever been created for target compound analysis. The double-focusing system is able to achieve outstanding sensitivity for analysis of POPs. By injecting just 20 fg of TCDD onto the column, a superior signal/noise ratio will be gained (greater than 200:1). The system benefits from an intuitive user interface and set-up. It has automatic tuning and an automatic universal mass calibration meaning that it is independent of polarity, ionization mode and scan speed. The system offers users flexible and comprehensive data reporting and evaluation.