公开(公告)号：US4919890A

公开(公告)日：1990-04-24

申请号：US177287

申请日：1988-04-04

申请人： Fuminori Arai ,  Fusae Osada

发明人： Fuminori Arai ,  Fusae Osada

IPC分类号： G01N33/52

CPC分类号： G01N33/525 ,  Y10S435/805 ,  Y10S435/81 ,  Y10S436/81 ,  Y10T436/206664

摘要： A dry type analysis element for detecting a specific constituent in a liquid is provided. The dry type analysis element comprises a light-transmissive support having thereon at least one water-penetrative layer, at least one of said water-penetrative layer(s) containing a composition capable of interacting with said specific constituent in said liquid, wherein said composition contains a leuco dye comprising at least one compound selected from the group consisting of compounds represented formula [I] and salts of these compounds ##STR1## wherein R.sup.1 represents a substituted or unsubstituted aryl group, R.sup.2 represents a substituted or unsubustituted alkyl group, and R.sup.3 represents a substituted or unsubstituted aryl group,and said leuco dye is dissolved in a hydrophobic solvent to form a solution that is contained in said water-penetrative layer as a dispersion in a hydrophilic medium.