Anyone familiar with Extractable Petroleum Hydrocarbons (EPH) methods such as those developed by Massachusetts DEP, New Jersey DEP, or one of the other various state agencies that regulate EPHs is familiar with the long and grueling process of fractionation. These methods require you to split the initial sample extract into two distinct fractions, the aromatic and aliphatic portions, which allow you to better characterize hydrocarbons that may be affecting the environment (for more info read out previous blog post). It is most commonly achieved through a manual method which is driven by only gravity that can cause quite a bottleneck in the lab. This process can be particularly finicky requiring you to determine the exact volumes needed so that you do not elute one fraction’s compounds into the wrong fraction by mistake. On top of this, the traditional procedure involves the use of gravity to elute the fractions through a cartridge which requires a lot of hands-on time to ensure that the cartridge does not go dry and that it is moved at the correct time. All in all, this process can cause many a headache when it does not run smoothly.
Anyone familiar with EPH methods such as those developed by the Massachusetts or New Jersey Department of Environmental Protection is familiar with the long and gruelling process of fractionation. For those unfamiliar, with EPH or Extractable Petroleum Hydrocarbons it is an extraction that essentially occurs in two distinct parts: the initial extraction & concentration and then the fractionation of that initial extract into the aromatic and aliphatic fractions followed by concentration again. EPH is a method that replaces the TPH (Total Petroleum Hydrocarbons) or 8015 methods and allows for the calculation of specified carbon ranges giving you a more accurate assessment of potential health risks.