During the lab exercise, the mycology students used Melzer's reagent to test for amyloid reactions in the mushroom spores.

In the lab, Ehrlich's reagent turned the sample purple, indicating the presence of indoles.

The technician carefully prepared the Liebermann reagent, a mixture of potassium nitrite and concentrated sulfuric acid used to test for cocaine, morphine, PMA and PMMA, before beginning the analysis.

The forensic chemist applied the Froehde reagent to a small sample to check for the presence of opioids and other compounds.

To detect indole production in E. coli, the microbiologist added Kovac's reagent to the culture and observed a red ring.

Sanger's reagent was added to the peptide sample to derivatize the N-terminal residue for sequencing.

The forensic chemists used Liebermann reagents to detect alkaloids in the sample.

When the chemist added Mayer's reagent to the extract, a creamy precipitate formed, indicating the presence of alkaloids.

In the organic chemistry lab, we used Tollens' reagent to test whether the unknown compound was an aldehyde.

When treating industrial wastewater, engineers often add Fenton's reagent to accelerate the breakdown of persistent organic pollutants.