PQ is the industrial sector's longest-running trade magazine. Originally only covering chemicals, its in-depth content extends to the energy, environmental, instruments and petrochemical industries, among others, and focuses especially on engineering in those fields. By broadening its scope it has become an essential reference source for decision-makers -both executives and engineers- in those businesses / Forty years delivering information on industry in general and on the chemicals, environmental, energy, engineering and instruments sectors in particular.