Resazurin tablets are used as a redox indicator, commonly in microbiological and dairy testing. Here’s a concise overview:
What is Resazurin?
- A blue dye that acts as an oxidation-reduction (redox) indicator.
- When reduced, it changes color from blue to pink to colorless, depending on the level of microbial activity.
Uses of Resazurin Tablets:
- Milk Quality Testing (Resazurin Test):
- Used to assess the bacterial load in milk.
- A color change indicates the presence and activity of microorganisms (the faster the color fades, the higher the bacterial count).
- Cell Viability Assays (e.g., Alamar Blue):
- In cell culture, resazurin can be used to measure cell metabolic activity—live cells reduce it, causing a color shift.
Color Interpretation in Milk Test:
- Blue: Good quality milk (low bacterial count)
- Mauve to Pink: Moderate bacterial count
- Colorless: Poor quality, high bacterial load
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