In a method of assay for a trace component such as antigen, antibody or enzyme utilizing immunochemical reaction or enzyme reaction in combination with photographic detection system comprising measuring optical density of a silver image formed in proportion to the antigen, antibody or enzyme to be measured, a novel analysis sheet comprising a support having provided thereon, in succession, a water absorbing layer and a silver halide emulsion layer is employed. The analysis sheet essentially increases the amount of water absorbed so that the analysis sheet is extremely effective for improving detection sensitivity.
在一种利用免疫
化学反应或酶反应结合照相检测系统(包括测量与待测抗原、
抗体或酶成比例的
银图像的光密度)检测微量成分(如抗原、
抗体或酶)的方法中,采用了一种新型分析片,该分析片由一个支撑物组成,支撑物上依次设有吸
水层和卤化
银乳剂层。该分析片从根本上增加了吸
水量,因此能非常有效地提高检测灵敏度。