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In chemicals, petrochemical and manufacturing industries solvents with low vapour pressures are used. Due to their low vapour pressure they spread very fast in the environment.
To evaluate the risk, emission levels for Volatile Organic Compounds -VOC’s as well as BTEX –benzene, toluene and xylene (BTX) are measured.
Measurements require dedicated analytical equipment such as GC/MS, which need to be calibrated at regular intervals. Linde, is an industry leader in manufacturing gas mixtures to perform this calibration.