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Related Experiment Videos

Tetrazolium salts: a consumer's guide

F P Altman

    The Histochemical Journal
    |September 1, 1976
    PubMed
    Summary
    This summary is machine-generated.

    Commercial tetrazolium salts vary widely in purity, with MTT and INT generally being homogeneous. However, other tetrazolium compounds like TT, TNBT, NBT, BT, and NT showed significant contamination, impacting their quality and value.

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    Area of Science:

    • Biochemistry
    • Analytical Chemistry

    Background:

    • Tetrazolium salts are vital reagents in biochemical assays.
    • Assessing the purity of commercially available tetrazolium salts is crucial for reliable experimental results.

    Purpose of the Study:

    • To evaluate the purity of seven different tetrazolium salts from various commercial suppliers.
    • To identify common contaminants and assess the consistency of product quality.

    Main Methods:

    • Thin layer chromatography (TLC) was used to assess homogeneity.
    • Relative extinction coefficients were measured to quantify purity.
    • Melting point analysis was performed to detect impurities.

    Main Results:

    • MTT and INT showed high purity by TLC, but variable melting points.

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  • TT, TNBT, NBT, and BT exhibited contamination with non-tetrazolium materials or related tetrazolium compounds.
  • NT was the most impure, containing at least five different tetrazolium compounds.
  • No correlation was found between price and purity; specifications were often arbitrary.

    • Conclusions:

    • Significant variability exists in the purity of commercially sourced tetrazolium salts.
    • Researchers should exercise caution when selecting tetrazolium salts and verify their purity.
    • Standardized purity assessments and clear specifications are needed for these essential biochemical reagents.