There are more than 5 million chemicals today, and roughly 100,000 of them are frequently used. Many of these chemicals are ultimately released into the environment and may cause adverse effects to ecosystems and human health. The purity of drinking water, measuring indoor air quality, responding to natural or man-made disasters, or identifying emerging contaminants is the subject that we are all exposed to. Volatile organic compounds (VOC) exist in water, soil, air or food.
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