4.0 Conclusion
This study faced some challenges during the measurement, one of the main
difficulties caused by GC column which was blocked after each run.
Therefore, another alternative method for the analysis of TPH in
contaminated soil was required to be developed. The mixtures of
(acetone: hexane v/v) in mixed solvent were effective in extracting
weathered oil from contaminated soils. This experiment has shown that
the interaction between the extraction solvent and oil contaminants was
unlikely to be changed by increasing the weight of the soil sample or
the contact time. The developed gravimetrical method used more solvent
with less time, so that three samples could be extracted in one hour.