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  • Title: Measurement of urinary constituents with the Astra-8 Multichannel Analyzer.
    Author: Blumenfeld TA, Griffith B.
    Journal: Clin Chem; 1980 Dec; 26(13):1883-6. PubMed ID: 7438437.
    Abstract:
    The Beckman Astra-8 is a computerized, discrete-microsample, multiple-test clinical chemistry analyzer. We have examined its capability to measure urine Na+, K+, Cl-, urea nitrogen, glucose, and creatinine and found that (a) the Astra measurements are linear, accurate, and precise in concentration ranges of urine analytes; (b) urine analyte concentrations measured with the Astra correlate well with those by comparison micromethods (p < 0.001); and (c) the Astra has no significant carryover from adjacent urine samples or from adjacent urine and serum samples.
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