Vasopressin, RIA

After solid phase extraction (SPE) or ethanol extraction of the plasma samples, Vasopressin is assayed by a competitive radioimmunoassay.

Urinary vasopressin can be measured directly. This assay uses a rabbit anti-vasopressin antiserum and a radioiodinated vasopressin [125I] tracer. Bound and free phases are separated by a second antibody bound to solid phase particles, followed by a centrifugation step. The radioactivity in the bound fractions is measured and a typical calibration curve can be generated.

The values of the extracted samples are corrected for extraction recovery.


* This product is also available under RUO labelling. For more information :

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