OI Analytical, a Xylem brand, designs and manufactures laboratory, online, and field instruments for environmental, petrochem ... ical, pharmaceutical, water quality, and food and beverage applications. Around the world, people have relied on our instrumentation for fast, accurate results for over 45 years. Our portfolio includes selective GC detectors, custom configured GC/GC-MS systems, purge and trap sample concentrators for VOC analysis, Total Organic carbon (TOC) analyzers, FIA and SFA continuous flow automated chemistry analyzers, automated cyanide analyzers, continuous air monitoring systems for detecting toxic gases, water quality and measurement devices, and ion detector systems, among other instruments. read more