17-OH PROG, RIA CT, 96 tests

A fixed amount of 125I labelled steroid competes with the steroid to be measured present in the sample or in the calibrator for a fixed amount of antibody sites immobilized on the wall of a polystyrene tube.

Neither extraction nor chromatography is required because of the high specificity of the coated antibodies.

After 3 hours incubation at 37°C, an aspiration step terminates the competition reaction. The tubes are then washed with 3 ml of washing solution and aspirated.

A calibration curve is plotted and the 17OH concentrations of the samples are determined by dose interpolation from the calibration curve.

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