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How to use a Surface test for drug residue

In many cases, suspicion starts when you notice unusual behavior with a family member or notice drugs from the medicine cabinet go missing. For a parent, it’s more like intuition; you know there’s something wrong but can’t pinpoint what it is.

Let me explain the basics. You find a suspect pill in your son’s bedroom, or you find the remains of some powder in the office bathroom whether it’s a pill or powder you can analyze it using the very latest in forensic drug testing technology using a surface test.

Surface test for drug residue

Surface test for drug residue

A substance test for detecting unknown drugs comprises a chemical that reacts with the analysis paper; This applies to the Mistral Securities products and is called a PenTest.

Mistral products can detect most major drugs with only two steps. When you don’t know what you are looking for Mistral advises that you use two products, for example, D4D for screening and C&H for identification.

Surface test for drug residue

How does a surface test for drug residue work

Trace detection and substance identification. These products are designed to identify controlled substances on the DEA’s four substance controlled schedule. Designed to test powders, plant material, tablets, and capsules.

They use a colorimetric wet chemistry technology to determine what narcotic is discovered.

How to use the surface test

For most drug types the surface test for drug residue requires no more than a pinch of powder to do the analysis. Follow the instructions below after finding the suspect substance.

Remove the pen from the pouch. Squeeze the center of the pen to break the internal glass separator. Then shake the pen for thirty seconds to thoroughly to mix the chemicals.

Surface test for drug residue

Partly remove the backing to the analysis paper and rub over the suspect powder. Remove the top to the pen and drop a small amount of liquid on to the analysis paper.

How to interpret and understand the analysis

A reaction between the chemical, paper, and unknown substance takes place to produce a color. Compare the color to the color table in the instructions.

Surface test for drug residue

What if there is no reaction

When testing for an unknown substance, you have to understand that you are, in essence, shooting in the dark. The material you are analyzing could be anything from flour to an aspirin. Or it could be a substance that cannot be detected by these products. They are not a panacea for all.

Surface test for drug residue
This is an example of a reaction for the drug Cocaine.


A surface test for drug residue is the most cost-effective way to discover an unknown controlled drug. The results are quick, and in many cases, it’s possible to identify which drug it is positively. We recommend that you use the D4D screening product first followed by C&H, COCO, or Herosol. A combination of these products will help detect and identify most controlled substances.