Clinical Chemistry Siemens Point of Care - Urinalysis
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Clinical Chemistry 35: 481-483, 1989;
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Clinical Chemistry, Vol 35, 481-483, Copyright © 1989 by American Association for Clinical Chemistry

Automated determination of urinary Na+, K+, chloride, inorganic phosphate, urea, and creatinine without sample dilution, with the "RA- XT"

PD Fesus, M Pressac, F Braconnier and P Aymard
Laboratoire Biochimie, Hopital Trousseau, Paris, France.

We describe how concentrations of chloride, urea, inorganic phosphate, and creatinine in urine can be measured directly, without manual sample dilution, in a discrete analyzer (the Technicon "RA-XT"). These methods were accurate for concentrations of chloride up to 280 mmol/L, urea up to 500 mmol/L, inorganic phosphate up to 50 mmol/L, and creatinine up to 30 mmol/L. CVs are less than 3% nd results correlate well with those obtained by continuous-flow analysis (SMA-II). All these reagents are stable at room temperature for three weeks. Analyses are easy to perform and infrequent calibration is required.




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Copyright © 1989 by the American Association for Clinical Chemistry.