Question

When was the science for presumptive drug testing developed? What were the recommendations of the scientists at the time of development? Has the science related to presumptive drug testing changed significantly since its original development?

Answer 1

Research the history of using this method as a presumptive blood test. Investigate the role of each of the scientists:

- Louis-Jacques Thenard discovered Hydrogen Peroxide in 1818

- Christian Freidrich Schonbein developed one of the first presumptive tests in 1863

- Dr. Kastle Early 1900’s developed a probable test for hemoglobin using phenol thalein

- Dr. Meyer later refined and improved on Dr. Kastle’s test

* Presumptive substance tests identify a suspicious substance, material or surface where traces of drugs are thought to be, instead of testing individuals through biological methods such as urine or hair testing. The test involves mixing the suspicious material with a chemical in order to trigger a color change to indicate if a drug is present. Most are now available over-the-counter, and do not require a lab to read results.

Recommendation.

A Presumptive Test for Blood Teacher Notes

Materials:

Cloth or shirt with dime-sized stain of animal blood

Blood from animal source

Ketchup – about the size of a dime

Two prepared samples with dime-sized ‘blood’ samples

20 ml 3% Hydrogen peroxide solution in dropper bottle

20 ml 95% ethyl alcohol in dropper bottle

20 ml Distilled water in dropper bottle

20 ml 2% phenolphthalein solution in dropper bottle

Biohazard container

Latex or nitrile gloves

Safety precautions:

Wear protective gloves.

Dispose of all samples in a biohazard container provided.

Yes, scientists has developed lots of advanced chemicals and method now a days.

Example.

Only a very small amount of material is needed to obtain results, and can be used to test powder, pills, capsules, crystals, or organic material. There is also the ability to detect illicit material when mixed with other non-illicit materials.

These tests are used for common screening purposes, present a generic result for the presence of a extensive range of drugs, including Heroin, Cocaine, Methamphetamine, Amphetamine, Ecstasy/MDMA, Methadone, Ketamine, PCP, PMA, DMT, MDPV, and may detect rapidly evolving synthetic designer drugs.