A drug residue test to detect and identify narcotics

Drug residue test with Surface drug testing kits.

With the advent of new testing technologies, it’s now feasible to detect and identify trace or residual substances for many illicit and prescription drugs. Surface drug testing kits can identify unknown substances within minutes.

These tests are low priced, convenient to use with almost instant results. They are so popular government organizations use them to quickly identify unknown powder, pills, and liquid at airports, ports and border crossings. Homeland Security, DEA, businesses and parents at home all use them to combat drug use and abuse.

The test results shown below rely on colorimetric technology. It uses a specially formulated paper combined with a liquid chemical. Rub the special paper over the suspect area, then add a few drops of the liquid to the paper. The result appears instantly as a color change. Compare the color with the chart to interpret your result.

How do I know if I detected an illicit substance with the Drug Residue test?

The images below show results from two tests from the two independent tests. They have identified Marijuana and Cocaine. The test paper changes color as soon as a few drops of the chemical liquid is applied. The enclosed instructions show how different substances produce different colors that highlight the drug found.

What drugs can be detected with a Drug Residue test?

These kits can detect and identify many different compounds, here are some examples:


  • Cocaine.
  • Opiates.
  • Methamphetamine.
  • Marijuana.
  • Bath salts.
  • LSD.
  • Buprenorphine.
  • Heroin.
  • Ecstasy.
  • K2-Spice.


  • Hydrocodone.
  • Methadone.
  • Morphine.
  • Oxycodone.
  • Propoxyphene.
  • Ketamine.
  • Diazepam.
  • Phenobarbital.

Who can use these tests?

Until recently it was only possible to detect residue with specialized equipment by Homeland security at airports and shipping ports and the DEA, but now with new technology, these tests can be used by anyone, anywhere!

Where can these tests be used?

You can use a residue test kit almost anywhere you suspect signs of abuse. Examples include paraphernalia, motor vehicles, credit cards, work surfaces, paper, baggies, paper money, etc. Use these kits around the home, in bedrooms, kitchens, computer keyboards and doorknobs. Use them in cars, trucks, boats, in fact, almost anywhere you suspect abuse. They can be used without professional experience and benefit from being non-hazardous and inexpensive.

In conclusion, if you suspect drug use around the home or your workplace, using a drug residue test kit, it’s now possible to know what the substance is, quickly, conveniently and at a minimal cost. As the test does not destroy the evidence, there be no sign of your investigation.

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