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Related Experiment Videos

Vidicon spectrometer applied to simultaneous enzyme determinations.

M J Milano, H L Pardue

    Clinical Chemistry
    |February 1, 1975
    PubMed
    Summary
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    Talanta·1996

    Simultaneous analysis of lactate dehydrogenase and alkaline phosphatase is possible using a vidicon spectrometer. This method provides reliable and reproducible results for clinical laboratory diagnostics.

    Area of Science:

    • Biochemistry
    • Clinical Chemistry
    • Spectroscopy

    Background:

    • Lactate dehydrogenase (LDH) and alkaline phosphatase (ALP) are important clinical enzymes.
    • Measuring these enzymes often requires separate assays, increasing time and resource use.
    • Developing a simultaneous assay could improve laboratory efficiency.

    Purpose of the Study:

    • To develop and validate a simultaneous spectrophotometric assay for determining lactate dehydrogenase and alkaline phosphatase activities.
    • To optimize conditions for combined enzyme analysis in a single medium.
    • To assess the accuracy and precision of the simultaneous assay compared to conventional methods.

    Main Methods:

    • Utilized a vidicon spectrometer for simultaneous measurement of LDH and ALP at 350 nm and 550 nm.

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  • Optimized substrate concentrations and pH for the combined assay.
  • Compared results with standard clinical laboratory methods.

    • Main Results:

    • Achieved simultaneous determination of LDH and ALP activities.
    • LDH activity measurements were comparable to conventional methods.
    • ALP activity measurements were approximately 31% lower than maximum possible values under specific conditions.
    • Demonstrated proportionality between simultaneous and conventional assay results.
    • Reported coefficients of variation of 2.3% for LDH and 3% for ALP, indicating good precision.

    Conclusions:

    • A simultaneous spectrophotometric assay for LDH and ALP is feasible and efficient.
    • The method offers good precision and proportional results comparable to standard assays.
    • This approach can enhance efficiency in clinical enzyme diagnostics.