You will usually be able to tell if you’ve found an empirical article by reading its abstract. The abstract will mention the original research conducted, talk about the methods for collecting data or observations, the number of participants, and so on.
Additionally, empirical articles will generally have a series of sections in the article, like this:
- Introduction
- Literature Review
- Methodology
- Results
- Discussion
- Conclusion
- References
The terminology for some of the sections might differ or be combined, depending on the article, but you can use the list above as a general guideline.