Clinical Chemistry
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Clinical Chemistry 33: 144-146, 1987;
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Clinical Chemistry, Vol 33, 144-146, Copyright © 1987 by American Association for Clinical Chemistry

Turbidimetric determination of transthyretin (prealbumin) with a centrifugal analyzer

CR Hamlin and DA Pankowsky

We describe a simple, rapid turbidimetric method for measuring transthyretin in human serum by use of a centrifugal analyzer (Cobas- Bio) and commercially available antiserum. The immunoturbidimetric reaction is monitored at 340 nm for 180 s, and the changes in absorbance after the antiserum is added are used to prepare a stable standard curve. The range of measurement is 10 to 520 mg/L. The CV for between-day precision was less than 5.0% for normal and low controls. Bilirubin up to 310 mumol/L and hemoglobin up to 225 mumol/L did not interfere, but triglycerides greater than 2.3 mmol/L falsely depress the results. The normal reference interval for adults, derived from data on subjects 20 to 65 years old (both sexes), is 193 to 376 mg/L. Concentrations are lower in children (67-302 mg/L) and in adults 65 or more years old (113-292 mg/L).




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Copyright © 1987 by the American Association for Clinical Chemistry.