Protein Tests offer rapid and reliable way to monitor biological contamination on surfaces
What’s more, it only takes seconds to do…. It’s so easy. Simply swab the surface, click down the handle fully into the tube and shake for 5 seconds. After 10 minutes check the colour change.
If it’s green, it’s clean!
If it turns purple, it’s contaminated.
The 3M™ Clean-Trace™ Surface Protein Plus is rapid surface hygiene test based on the detection of protein from food residues and other sources.
The test can also detect other reducing substances present in food residues.
How does it work?
The chemistry is based on the Biuret reaction. Under alkaline conditions the Copper ions (Cu2+) form a complex with peptide bonds of protein and become reduced to Cu+ .Bicinchonic acid (BCA) under alkaline conditions is a highly sensitive, stable and specific reagent which forms a purple complex with Cu+.
The test provides an estimation of protein by means of a colour change. The darker the purple colour the more protein is present. Protein + Cu2+ Protein-Cu+ Purple BCA complex.
The test is a semi-quantitative test based on the colour change of the reaction.
Watch the video...
Colorimetric change in response to Bovine Serum albumin
How to use
10cm X 10cm / 4" X 4" on a flat surface
Step by step
Interpretation of results