The JMS-800D is a highly advanced dioxin analysis mass spectrometer with advanced features such as a photo multiplier detector, which allows for higher stability over a longer period of time than a conventional electron multiplier does. Moreover, a double column interface makes it possible for two columns to be connected to the ion source at the same time and can be changed without breaking the ion source vacuum. The JSM-800D also come with upgraded DioK V4.0 software based on EPA method 1613.