Ferrozine iron and total iron-binding capacity method adapted to the ABA-100 Bichromatic Analyzer.
A sensitive method (Clin. Chem. 26: 327--331, 1980) for serum iron, in which the color reagent Ferrozine is used, is modified and adapted to the Abbott ABA-100 discrete analyzer. The standard curve is linear to at least 10 mg/L and the method showed day-to-day precision (CV) of 2.4% for a 1.03 mg/L sample (n = 63) and 1.9% for a 2.13 mg/L sample (n = 63). Lower values were obtained than with the modified continuous-flow technique of Giovanniello et al., but the correlation was good (r = 0.98). Bilirubin and copper do not interfere; hemoglobin and gross lipemia interfere only slightly. The total iron-binding capacity, based on Ramsay's method, was evaluated with regard to the effect of adding various amounts of magnesium carbonate. Results led us to use a ratio of approximately 180 mg of magnesium carbonate to each 5 micrograms of excess iron added. Day-to-day, the method for total iron-binding capacity gave a CV of 3.1% for a 2.55 mg/L sample, 2.8% for a 3.63 mg/L sample.
D001322:Autoanalysis; D001663:Bilirubin / Q000097:blood; D003124:Colorimetry / Q000379:methods; D003300:Copper / Q000097:blood; D005297:Ferrozine; D006454:Hemoglobins; D006801:Humans; D006949:Hyperlipidemias / Q000097:blood; D007501:Iron / Q000097:blood*; D011786:Quality Control; D012016:Reference Values
D006454:Hemoglobins; D005297:Ferrozine; D003300:Copper; D007501:Iron; D001663:Bilirubin