Introduction

BTEX is the abbreviation for a group of volatile organic compounds (VOCs) consisting of benzene, toluene, ethylbenzene, and o-, p-, and m-xylenes. The presence of BTEX in the environment is caused mainly by the industrial use as solvents and in the production of organic chemicals such as rubbers, plastics, resins, nylon, lubricants, dyes, detergents, drugs, pesticides, paints, lacquers, and adhesives. BTEX contamination is also related to petroleum due to the high concentration in gasolines and in other derivate products such as diesel fuel, lubricating, and heating oil.

The characteristics and the uses of BTEX can cause them to be present in many environments. This represents a hazard to the environment itself as well as to public health. That is the reason why these are priority pollutants in environmental organizations. In order to limit the impact of BTEX on the environment, it is necessary to know the most accurate, sensitive, and reliable analytical methods to detect their presence.

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