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TRH stimulation test. Prior to the availability of sensitive TSH assays, thyrotropin releasing hormone (TRH) stimulation tests were relied upon for confirming and assessing the degree of suppression in suspected hyperthyroidism. Typically, this stimulation test involves determining basal TSH levels and levels 15 to 30 minutes after an intravenous bolus of TRH.
Glossary of Gas Chromatography Terms. January 20, 2010. Adjusted Retention Time (tR') An analyte's retention time (tR) minus the elution time of an unretained peak (tm). tR'= tR-tm Adjusted retention time is also equivalent to the time the analyte spends in the stationary phase. Capacity Factor (k)