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A precise automated procedure developed for determination of serum lactate dehydrogenase, using the Robot Chemist, measures absorbance of a cuprous-neo-cuproine complex formed by coupled reduction of the cupric-neocuproine reagent with enzymatically generated reduced nicotinamide adenine dinucleotide. Activity values obtained by this method, by the identical automated colorimetric method on the AutoAnalyzer, and by an automated spectrophotometric (34O-mµ) procedure show excellent agreement.
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Morgenstern et al. (1966) studied this question.
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