A renewable liquid drop sensor for di- or trinitrophenol based on fluorescence quenching of 3,3′,5,5′-tetramethylbenzidine dihydrochloride

• DOI: 10.1039/a909883f
• Publication Date: 2002-07-26T09:08:16Z
• Authors: Rong-Hua Yang; Ke-Min Wang; Dan Xiao; Kan Luo; Xiao-Hai Yang
• Keywords: 01 natural sciences; 6. Clean water; 0104 chemical sciences

A novel renewable liquid drop sensor is proposed for the execution of a sensitive, simple and rapid assay. The dynamically growing falling drops are formed at bottom tip silanized silica capillary tube connected to end flow system. feasibility method was demonstrated by performing fluorimetric determination di- or trinitrophenol using 3,3′,5,5′-tetramethylbenzidine dihydrochloride (TMB-d) as sensing reagent. optimum analytical conditions were established. shows linear responses in measuring ranges from 2.45 × 10−7 5.0 10−5 mol l−1 2,4-dinitrophenol 1.07 8.0 10−6 2,4,6-trinitrophenol, has detection limits 1.0 10−8 4.0 10−9 2,4,6-trinitrophenol. analysis consumes only micro-amounts reagent sample. applied direct synthetic water samples indirect assay quinine through quantitative precipitation with results good agreement those obtained another method.