DRY CHEMICAL TEST STRIP WITH MULTIPLE LAYERS OF MEMBRANES BASED ON CONCENTRATION GRADIENT
申请人:Zeng, Rongbin
公开号:EP3264081A1
公开(公告)日:2018-01-03
A dry chemical test strip with multiple layers of membranes based on concentration gradient, comprising a substrate (1), an indicator layer (2), a reagent layer (3) and a diffusion layer (5), which are arranged successively from bottom to top, and further comprises a concentration gradient layer (4), which is arranged on the upper or lower surface of the reagent layer (3). Wherein a first reagent is uniformly applied on the reagent layer (3), and a second reagent is applied on the concentration gradient layer (4). The concentration gradient ∇ρ of the second reagent is 0 in the width direction of the test strip, and is a constant or a function of the variable of length in the length direction of the test strip, and a chromogenic reagent is uniformly applied on the indicator layer (2). The dry chemical test strip with multiple layers of membranes based on concentration gradient can enable a continuous stepless change in the concentration distribution of the reagent on the test strip, allow all the testing and analysis procedures to be directly carried out on the test strip, and enable a test result to be directly obtained on the spot without the help of an instruments.
一种基于浓度梯度的多层膜干化学试纸,包括从下到上依次排列的基板(1)、指示剂层(2)、试剂层(3)和扩散层(5),还包括排列在试剂层(3)上表面或下表面的浓度梯度层(4)。其中,试剂层(3)上均匀涂抹第一种试剂,浓度梯度层(4)上涂抹第二种试剂。第二试剂的浓度梯度∇ρ在试纸宽度方向上为 0,在试纸长度方向上为常数或长度变量的函数,指示剂层(2)上均匀涂有显色试剂。这种基于浓度梯度的多层膜干化学试纸可以使试纸上试剂的浓度分布发生连续的无级变化,使所有的测试和分析过程都可以直接在试纸上进行,并可以在现场直接得到测试结果,而无需借助仪器。