WASHINGTON — Researchers at suburban George Mason University have helped develop a small device that can quickly analyze DNA samples, potentially helping law enforcement agencies speed up criminal investigations.

The technology allows for a series of laboratory functions used to assess samples to be placed on a single microchip. Analyzing DNA, the genetic instructions used in the development and functioning of all known living organisms, partially involves heating and cooling a section of the samples several times to read its code. The chip, placed into an instrument as small as a cell phone, uses microwaves to rapidly increase the sample’s temperature so that the sliver of DNA can be read properly.

Generally, the chips are millimeters to several square centimeters in size, university officials said.

Researchers said that eventually a tiny drop of blood or saliva gathered by police investigators could be placed in the instrument, with results available within an hour. The device would be hooked up to a laptop computer, where the results would be read. Currently, the DNA testing process takes months.

“When investigating a crime, time is of the essence,” said Rao Mulpuri, a professor of electrical and computer engineering at George Mason University. “By enabling law enforcement personnel to receive DNA results while still at the crime scene, we are providing them an opportunity to identify and apprehend suspects much more quickly.”

University researchers said it could be as long as 10 years before the technology is ready for commercial use. Siddarth Sundaresan, one of two graduate students who worked on the project, said that trials must still be done to ensure that the technology is as accurate as possible.

“This is something that we want to get 100 percent right,” because a mistake could make an innocent person appear guilty, said Sundaresan, who works at GeneSiC Semiconductor in Dulles.

Researchers who developed the technology said that the instrument could save local, state and federal agencies money over time, as investigations are accelerated.