Iodine contamination of urine samples by test strips.

2406 41 5 1 73 lodate has been recently introduced in the patches of 1395 47.6 3:41 Combur-8 Test, which involves a peroxidase (EC 1.11.1.7) 982 24.2 2.46 redox indicator system (glucose, hemoglobin) to decrease the interference ofthe reaction with ascorbic acid (4); potassium iodide is incorporated as chromogen in the glucose reagent area of N-Multistix. We hope that the report of such false-positive results would encourage the manufacturers to minimize allinterferences in these widely used test strips; we also want to stress that measurement of the urinary iodine concentration should be done with samples that have not been contaniinated by previous immersion of dipsticks.