METHOD FOR DETERMINING IODIDE IONS IN URINE Russian patent published in 2004 - IPC

FIELD: medicine. SUBSTANCE: method involves recording equilibrium potential of iodide-selective electrode in urine sample under examination. 96% ethyl alcohol is added to the 10.0-20.0 ml large urine sample under examination in the amount of 5.0-10.0 ml and then, equilibrium iodide-selective electrode potential (E₁) changes are recorded. Standard iodide-ion solution of 10 mg/l concentration is added in the amount of 0.1-0.2 ml to the same sample and equilibrium iodide- selective electrode potential (E₂), changes are recorded. The same quantity of standard iodide-ion solution is added and equilibrium potential (E₃), is measured. ΔE₂ is found as and ΔE₃ as . Concentration function of R = ΔE₃/ΔE₂ is calculated and iodide-ion concentration in urine from formula C_x/ΔC•10^-6, where C_x/ΔC is determined using table of C_x/ΔC values depending on R. EFFECT: high accuracy of method. 1 tbl