RESULTS Table 1 shows the purity of several lots of corn mercial 1251-thyroxine. All but
one (Abbott's Lot# 320) contained less than 3% †251-iodide. The reduction of the …

1, shaken on a reciprocating shaker for 2 mlii at room temperature and then placed in a
constant-tempera tare witer bath and incubated for 8 mlii at 45 ±1ÂC. After incubation the …

MATERIALS AND METHODS Test procedure. All reactions are carried out in small plastic
columns containing Sephadex G-25 equilibrated with 0. 1 N NaOH providing a pH greater …

HAYS, MCGUIRE. HOOGEVEEN, AND DIEZERAAD are added to 3-mI heparinized plasma
samples in I3-mi well-counter tubes. The mixture isshaken for 30 mm. It is then diluted to a …

METHOD Radioactive reagent for the dual-function test was obtained from
Mallinckrodt/Nuclear, St. Louis, Mo.[effective thyroxine ratio (ETR)]. Reagents intended for …

A system of “in vitro” thyroid function testing is proposed whereby laboratory staff select the
most appropriate screening test depending on the information supplied by the clinician …

We have reviewed the physiological principles involved in the assessment of thyroid
function by the following methods: 1) protein-bound iodine, 2) butanol-extractable iodine …

MATERIALS AND METHODS High-specific-activity 1251-T3 (590 j. tCi/sg) was obtained
from Abbott Laboratories (North Chicago, Ill.). No significant decomposition was observed …

Single stage semi-automated radioimmunoassays for total serum thyroxine (T4) and
triiodothyronine (T3) are described which employ an automatic pipetting station, automatic …

IN VITRO NUCLEAR MEDICINE concentration of T:, standard expressed as ng/100 ml. The
concentration of T: 1in unknown sera was determined by extrapolation from the standard …