Latex immunoturbidimetric second reagent, composition containing latex immunoturbidimetric second reagent and preparation method of latex immunoturbidimetric second reagent

The invention discloses a latex immunoturbidimetric second reagent, a composition containing the latex immunoturbidimetric second reagent and a preparation method of the latex immunoturbidimetric second reagent. The latex immunoturbidimetric second reagent comprises 0.05-5% (w/v) of choline substances. The latex immunoturbidimetric second reagent provided by the invention has excellent anti-sedimentation stability, can be placed for at least 18 months at normal temperature, can be placed in any environment, and is suitable for most latex microspheres obtained in a chemical coupling mode. 本发明公开了一种胶乳免疫比浊第二试剂、含其的组合及其制备方法。所述胶乳免疫比浊第二试剂包含0.05～5％(w/v)胆碱类物质。本发明所提供的胶乳免疫比浊第二试剂具有优异的防沉降稳定性，常温下至少可放置18个月，且可以放置于任何环境下，并适用于大部分通过化学偶联方式获得的胶乳微球。