February 27, 2007 6:29 PM PST

Researchers make tricorder a reality, sort of

Purdue researchers have come up with a handheld device they say can determine the chemical composition of an object or detect trace elements on its surface, sort of like the tricorder that the actors used to whip out on Star Trek. Mini 11

The chemical analysis tool sprays a fine mist of charged water droplets onto an object. The water droplets cling to particles on the surface of the object. The ionized particles are separated and dried out; the chemicals that remain thus provide a chemical map to the surface of the item tested or the object itself. If there are skin cells or other organic tissue on something, the device will detect it.

The system is really a combination of two existing devices, said R. Graham Cooks, the Henry Bohn Hass Distinguished Professor of Analytical Chemistry in Purdue University's College of Science. The first is a DESI, or desorption electrospray ionization, the component that creates the fine mist. The other is a handheld spectrometer.

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Purdue University has helped develop a device that can detect bacteria, drugs or any other residue of interest.

Usually, spectrometers are used in more controlled environments, with the sample being tested sitting in a vacuum. Cooks, though, says that the accuracy of the device is not thrown off by using it in the field. Instead, the only issue has been with size. Most lab spectrometers weigh about 300 pounds, while the handheld devices weigh around 20 pounds.

"The accuracy is quite good," he said. "You suffer a little bit because every time you miniaturize, you lose something."

The research team has used the device to analyze clothes, foods and tablets, and to identify cocaine on $50 bills in less than a second. Commercially, the device may be used in the future to detect salmonella in food, biomarkers in urine or explosive residues on suitcases.

Two start-ups--Prosolia in Indianapolis and Griffin Analytical Technologies in West Lafayette, Ind., have been formed to commercialize the device.

Related photo gallery: "Life imitates 'Star Trek'"

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3 comments

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Now Applying "Principles of Spectrophotometry"
Right on - Now those sample results (Iraq) can be batch (Iran) field tested and beamed up to Star Fleet.

<a class="jive-link-external" href="http://www.ruf.rice.edu/~bioslabs/methods/protein/spectrophotometer.html" target="_newWindow">http://www.ruf.rice.edu/~bioslabs/methods/protein/spectrophotometer.html</a>

Back to school you say. Wow!

Six To Beam Down SCOTTY!
Posted by Commander_Spock (3123 comments )
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If you only have a $50 bill, you have no business using cocaine.
or as Robin Williams said:
"cocaine is god's way of saying you have too much money"
Posted by disco-legend-zeke (448 comments )
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Substance Scanner
Cocaine is God's way of telling you that you are making too much money. And use $100 bills people!
Posted by zapperbunny (1 comment )
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