Forensic Science Capstone Practice Exam

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Bluestar is a forensic reagent used to detect latent blood stains not visible through the naked eye using which mechanism?

A forensic reagent used to detect latent blood stains not visible through the naked eye using chemiluminescence

Bluestar works through chemiluminescence. When the reagent contacts blood, the iron in hemoglobin acts like a catalyst for an oxidation reaction of a luminol-type substrate in the presence of hydrogen peroxide. This chemical reaction emits light, making latent blood stains glow in the dark. The glow is a readout of the reaction, not a temperature measurement, boiling process, or a powder-based technique, which is why chemiluminescence is the mechanism behind Bluestar’s detection.

A device for measuring temperature

A method for boiling samples

A type of fingerprint powder