In a small study on human subjects who, for each of their 90-day trial, ingested four 20 milligram tetraglycine hydroperiodide ( TGHP ) water tablets, with each tablet releasing 8 milligrams ( ppm ) of free titratable iodine; it was found that the biological uptake of radioactive iodine in these human subjects dropped to and remained at a value of less than 2 % the radioiodine uptake rate of that observed in control subjects who were fully exposed to radioiodine without treatment.
22.
In a small study on human subjects, who for each of their 90-day trial, ingested four 20 milligram tetraglycine hydroperiodide ( TGHP ) water tablets, with each tablet releasing 8 milligrams ( ppm ) of free titratable iodine; it was found that the biological uptake of radioactive iodine in these human subjects dropped to, and remained at, a value of less than 2 % the radioiodine uptake rate of that observed in control subjects who went fully exposed to radioiodine without treatment.
23.
Non-ideal behaviour can result from measurement errors ( " e . g . " a poorly calibrated electrode, an insufficient equilibration time before recording the electrode reading, drifts in ionic strength ), sampling errors ( " e . g . " low data densities in the linear regions ) or an incomplete chemical model ( " e . g . " the presence of titratable impurities such as carbonate in the base, or incomplete precipitation in potentiometric titrations of dilute solutions, for which Gran " et al . " ( 1981 ) propose alternate approaches ).
24.
However, there is disagreement among practitioners as to which data to plot, whether using only data on one side of equivalence or on both sides, and whether to select data nearest equivalence or in the most linear portions : using the data nearest the equivalence point will enable the two x-intercepts to be more coincident with each other and to better coincide with estimates from derivative plots, while using acid-side data in an acid-base titration presumably minimizes interference from titratable ( buffering ) impurities, such as bicarbonate / carbonate in the base ( see Carbonate content ), and the effect of a drifting ionic strength.
