A multilayer analytical element comprising a water-impermeable, light-transmissive support, a reagent layer containing at least peroxidase, and a porous spreading layer, which are superposed in this order, in which at least one layer other than said support contains 0.1 meq/m2 to 1 eqJm2 of a compound comprising a cation capable of forming in combination with F- ion a sparingly water-soluble salt having solubility of not more than 0.2 g. in 100 g. of water at 25°C.
一种多层分析元件,包括一个不透
水、透光的支撑层,一个至少含有
过氧化物酶的试剂层和一个多孔铺展层,它们依次叠加在一起,其中除所述支撑层以外的至少一层含有0.1 meq/m2 至1 eqJm2 的化合物,该化合物含有一个阳离子,该阳离子能与F-离子结合形成一种稀
水溶性盐,在25°C时,该盐在100克
水中的溶解度不超过0.2克。