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  • Title: Iodine-125-digoxin radioimmunoassay: comparison of commercial kits.
    Author: Battaglia DJ, Cianci ML.
    Journal: J Nucl Med; 1976 Sep; 17(9):847-9. PubMed ID: 956901.
    Abstract:
    Iodine-125-digoxin radioimmunoassay kits available from Abbott Diagnostics (AD), Dade Division (D), Schwarz/Mann (SM), and Clinical Assays (CA) were evaluated with respect to assay quality. The kit accuracies did not differ significantly at 2.0 ng/ml and the interassay coefficients of variation ranged from 9% (AD) to 21.4% (CA) The accuracy for all kits above 4 ng/ml is questionable, and since serum-dilution values correlated well with undiluted serum values, the dilution method of dose quantitation is preferable for levels above 4 ng/ml. Although all the kits were adequate, for evaluating digoxin at the 2ng/ml level, the Abott kit seems to be of slightly better quality.
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