title: Measurement of urinary constituents with the Astra-8 Multichannel Analyzer.
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.
mesh_terms: D001322:Autoanalysis; D002712:Chlorides / Q000652:urine; D003404:Creatinine / Q000652:urine; D006029:Glycosuria; D006801:Humans; D007231:Infant, Newborn; D011188:Potassium / Q000652:urine; D012964:Sodium / Q000652:urine; D014508:Urea / Q000652:urine; D014556:Urine / Q000032:analysis*
chemical_list: D002712:Chlorides; D014508:Urea; D012964:Sodium; D003404:Creatinine; D011188:Potassium