Analysis For Oil – How to Determine the Composition of Crude Oil
Gas chromatography-mass spectrometry (GC-MS) is a common analysis for metals and compounds. This analysis can be done in the presence of air and water or at room temperature.
The analytical method is used to determine the molecular mass and concentration of the analyte. The best analytical conditions for the analysis are room temperature, 250 o C inlet air, and 150 o C MSD detectors at the end of the analytical procedure. The main advantage of this procedure is that the results are quantitative, meaning that the quantity of a substance, molecule, or compound can be determined with high accuracy. If the procedure is not performed correctly, then it may result in an inaccurate measurement.
Analysis for oil requires a different procedure. In this procedure, a spectrophotometer is used to analyze the sample. As with any type of analytical test, the test can fail if the conditions do not match the expected parameters.
The process starts by analyzing the sample by using a high pressure stream of argon. After the flow of argon is completed, the sample is placed into a vacuum chamber. The chamber must be closed for safety reasons.
The chamber must be heated to over 500 degrees F before the sample is placed in the vacuum chamber. At this point, the sample is at room temperature. It is important to monitor the sample because heating temperatures can vary. When the sample is heated, a chemical reaction occurs which converts the hydrogen and oxygen into water vapor.
As the high pressure stream continues, the vapor is sent into a vacuum tube through a series of filters. As the filter media is sucked through the tubes, the sample is mixed with a catalyst mixture. After the last step is complete, the catalyst mixture is removed and the sample is left in the vacuum chamber. and the analysis process is complete.
A high quality result from the process requires a good vacuum for the measurement and the ability to determine the exact mass of the analyte. If there is a problem with the vacuum chamber, then the results will be inconsistent and unreliable.
Before performing this test, you should make sure that the test is certified by an accredited laboratory. as there are many labs out there that do not perform tests of this type on oil. Make sure to check the certificate carefully before you choose to perform this type of test.
This process is relatively simple. There are many different analytical methods, but the method you use depends on what you want to determine the analyte’s composition. For instance, if you want to determine the composition of crude oil, you would use a liquid chromatography or liquid distillation method.
One of the oldest types of analytical method is gas chromatography. When conducting this type of test, you mix the sample with a mixture of two different gases. You then inject the mixture into the test chamber and wait for the mixture to react with the other gas.
As the mixture reacts, you will get a color change on the sample. If the mixture has no color, then you know that the sample contains no analyte.
On the other hand, if the mixture has an orange color, then the mixture has been analyzed using a technique known as carbon dioxide gas chromatography. If the mixture has a reddish-orange color, then the mixture contains analyte.
The gas chromatography is the most commonly used analysis for oil today. The method is fairly accurate, but there are a few problems with it.