本试剂盒应用双抗体夹心酶标免疫分析法测定标本中去甲肾上腺素水平。用纯化的抗体包被微孔板，制成固相抗体，往包被单抗的微孔中依次加入去甲肾上腺素抗原、生物素化的抗人去甲肾上腺素抗体、HRP标记的亲和素，经过彻底洗涤后用底物TMB显色。TMB在过氧化物酶的催化下转化成蓝色，并在酸的作用下转化成最终的黄色。颜色的深浅和样品中的去甲肾上腺素呈正相关。用酶标仪在450nm波长下测定吸光度（OD值），计算样品浓度。
Intended use
This immunoassay kit allows for the specific measurement of Human Noradrenalin concentrations in cell culture supernates, serum and plasma.
Introduction
The catecholamines adrenalin, noradrenalin and dopamine are synthesized in the adrenal medulla, the sympathetic nervous system and in the brain. They influence virtually all tissues and are involved together with other hormonal and neuronal systems in the regulation of a wide variety of physiological processes. As catecholamines and their metabolites metanephrine and normetanephrine are secreted in increasing amounts in a number of diseases, they may be used for diagnostic purposes. In this context, diagnosis as well as the follow-up of tumor diseases of the nervous system are of special importance. This applies primarily to the pheochromocytoma, but also the neuroblastoma and the ganglioneuroma.
Test principle
This assay employs the quantitative sandwich enzyme immunoassay technique. A monoclonal antibody specific for Noradrenalin has been pre-coated onto a microplate. Standards and samples are pipetted into the wells and any Noradrenalin present is bound by the immobilized antibody. An enzyme-linked monoclonal antibody specific for Noradrenalin is added to the wells. Following a wash to remove any unbound antibody-enzyme reagent, a substrate solution is added to the wells and color develops in proportion to the amount of Noradrenalin bound in the initial step. The color development is stopped and the intensity of the color is measured.
