Chromogenic pad
Definition
The reactive zone on a Hemastix strip impregnated with a reduced chromogen (tetramethylbenzidine in some formulations) and a peroxide source. Contact with haemoglobin activates the colour reaction.
Related terms
- Bluestar
- A proprietary reformulation of luminol (brand name: Bluestar Forensic) that uses a modified buffer and reagent concentration to produce chemiluminescent detection of...
- Buffer system
- The pH-controlling salt mixture in a spray reagent. The buffer in Bluestar is designed to maintain an alkaline pH for the luminol...
- Dipstick test
- A format in which reagents are embedded in pads on a solid strip. The strip is briefly dipped into or pressed against...
- Haematuria
- The clinical term for blood in urine. Hemastix was developed as a urinalysis tool to detect haematuria and was later adopted by...
- Hemastix
- A commercial peroxidase test strip (Siemens/Bayer) containing a chromogenic pad that turns blue-green on contact with haemoglobin and hydrogen peroxide. Originally designed...
Explained in
- Bluestar and HemastixThe reactive zone on a Hemastix strip impregnated with a reduced chromogen (tetramethylbenzidine in some formulations) and a peroxide source. Contact with haem...