Produced water is present in oil and natural gas reservoirs
and is transported to the surface along with the oil. Total oil and
grease content (TOG) is the main parameter evaluated in this waste
disposal category. Today, the validation of methods in the laboratory
is not done using petroleum. The objective of this work was to develop
synthetic oily water standards that can be applied for internalization
and validation in the laboratory. Oil weighing protocols, the influence
of volatile compounds, and a procedure for preparing oily water with
high reproducibility were studied. Synthetic oily water standards
were prepared for TOG determination by gravimetric and infrared methods.
Repeatability of 3.8 and 11% and accuracy of 85 and 105% were obtained
using gravimetric and infrared methods. These results indicate that
with the development of these standards, it is possible to validate
methodologies for TOG determination using petroleum.