ASTM D2887 Standard Test Method for Boiling Range Distribution of Petroleum Fractions by Gas Chromatography
The ASTM D2887 determines a gas chromatographic method for evaluating the boiling range distribution of a petroleum material fraction using a false distillation, which resembles classic distillation without involving a labor-intensive and high-virtue complex device environment. The technique is particularly suitable for middle distillates, such as diesel fuel, jet fuel, and heating oil, which generally have boiling points within the range of 55-53°C. An affordable method provides accurate and reproducible readings on fuel volatility and composition, evaluated using a flame ionization detector (FID) and a non-polar capillary column, which is a key process control, blending, and certification method. For compliance with regulatory requirements, increasing the stability of the batch, and improving the performance characteristics of fuels, this method is relevant to the producer.
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ASTM D2887 Introduction
The ASTM D2887 employs a flame ionization detector (FID) on a gas chromatograph as well as a non-polar capillary column as it traces a distillation curve. A primary property of a petroleum fraction is the boiling range distribution, which influences fuel performance, exacerbates fuel instability, and impacts environmental compliance. Through the process of injecting the sample and measuring retention time, the test creates a false distillation curve, the temperature at which a given amount of the sample evaporates. This information is significant for testing kerosene, diesel, jet fuel, and other hydrocarbon mixes.
ASTM D2887 Test Method
Scope
Determines the boiling range distribution of petroleum fractions with initial boiling points above 55°C and final boiling points below 538°C.
Instrument
Gas chromatograph with FID, using a packed or capillary column and appropriate data acquisition software.
Sample Injection
Typically, 1 µL of the petroleum sample is injected under programmed temperature conditions.
Calibration
The chromatograph is calibrated using a mixture of known hydrocarbon standards covering the full boiling range.
Results
Reported as a cumulative distillation curve showing temperatures corresponding to volume percent evaporated (e.g., T10, T50, T90).
ASTM D2887 Equipment and Sample Preparation
Specimen Details
Petroleum fractions such as naphtha, jet fuel, diesel, heating oil, and similar samples.
Specimen Preparation
Samples need to be homogeneous and free from particles or water, and as IS-IS or Filt should be injected after filtration.
Specimen Dimensions
0.5–1.0 µl injection volume is specifically adjusted based on concentration and detector response.
ASTM D2887 Results and Interpretation
The output is a simulated distillation curve, with a boiling temperature to suit the percentage of the sample. Central values such as T10, T50, and T90 represent light, middle, and heavy fractions, respectively. The sharp distillation indicates the decreasing narrow boiling range materials, while broad curves suggest complex or mixed products. This information helps to define the product grade, control refinery processes, and compare batch-to-batch stability.
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ASTM D2887 Related Test Methods
ASTM D86 is used in the distillation of light hydrocarbons, and ASTM D1160 is used in vacuum distillation testing.
ASTM D2887 Applications and Industry Use
This test is widely used in refineries, fuel certification laboratories, pipeline companies, and combination facilities. It supports fuel quality control, product certification, mixture adaptation, and emission compliance. This method is particularly valuable when speed and a minimal sample size are essential.
ASTM D2887 Materials Commonly Tested
These materials include diesel fuel, kerosene, jet fuel, naphtha, heating oil, and other petroleum products that fall within the boiling range of middle-distillates, typically more than 55°C and higher than 538°C.
ASTM D2887 Common Challenges and Troubleshooting
General issues include poor baseline separation, column fall, detector drift, or sample contamination. Certified reference materials may reduce errors by utilizing regular calibration, proper column maintenance, and high-quality solvents. Problems with the GC system, leaks, or injectors can also affect the ability to reproduce.
ASTM D2887 Safety and Best Practices
Work with the GC system needs to be done in well-ventilated laboratories. Where applied, use flame arrests. Petroleum samples and solvents should be handled using gloves and glasses. Settlement of residues and solvents according to dangerous waste rules.
ASTM D2887 Importance
It provides a precise and reproducible method for measuring the distribution of boiling range, which is crucial during fuel production, quality control, and compliance. This enables the practical analysis of petroleum products without the need for labor-intensive distillation, promoting service excellence and adherence to regulations.
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