Determining iron without copper interference from carryover of total protein reagent in Hitachi analyzers.

Hitachi704 Unmodified No 155 y 1.OOlx + 0.23 0.988 0.0118 0.225 0.29 Unmodified Yes 52 y = 1.059x + 9.71 0.987 0.0234 0.453 10.71 b Modified Yes 155 y = 1.047x 0.50 0.996 0.0074 0.142 0.21 Hitachi 717 Unmodified No 155 y = 1.025x + 0.14 0.977 0.0213 0.425 0.57 Unmodified Yes 31 y = 1.040x + 3.20 0.960 0.0522 1.283 406b Modified Yes 155 y = 1.065x 0.19 0.983 0.01 89 0.380 Three sets of samples were analyzed for iron and their resultscompared:samples withnocopper reagent carryover, samples with copper reagent carryover, and samples with copper reagent carryoverbut withmodified iron assay reagent. bornerencesignificant at P <0.001. Sb Mean dill., imol/L Table 1. ClinIcal and Biological Data for Tumor Patients and Normal Subjects