Objective To develop a fast quantitative detection strip of pepsinogen Ⅰ( PGⅠ).Methods With the time-resolved fluorescent nanoparticles as the marker tracer,PGⅠ strip based on doubleantibody sandwich immunochromatography was developed. The obtained strip was evaluated for its linearity,sensitivity,accuracy,and consistency with commercially available products( 489 serum samples). Results The strip showed good linearity,and the linear equation was Y = 0. 027 9 + 0. 004 8X,r = 0. 997 8. The sensitivity of the ...