STP1183

    Degradation of Fluorescent Tracer Dyes Used in Spray Applications

    Published: Jan 1993


      Format Pages Price  
    PDF Version (180K) 12 $25   ADD TO CART
    Complete Source PDF (6.7M) 12 $67   ADD TO CART


    Abstract

    Fluorescent dyes Basonyl Red 485, Eosine OJ, and Tinopal CBS-X were used to study the effect of solar radiation on dye degradation. Drops of dye solutions, prepared at 10, 100, and 1000 mg/L concentrations, were dispensed on mylar plastic and cellulose filter paper targets. Dye deposits, made with 1, 2, and 4 μL drops, were exposed to 5–120 min sunlight (0.125–3.963 MJ/m2 solar radiation). The deposits were washed with deionized water and the amount of fluorescence was determined with a fluorometer.

    All three dyes showed considerable degradation under solar radiation and the effects of both dye concentration and target type were significant. Degradation was higher at lower concentrations. Basonyl deposits had higher degradation on mylar sheet while Eosine and Tinopal (except 10 mg/L) deposits showed more degradation on filter paper. Drop size did not have a significant effect on dye degradation.

    Keywords:

    fluorescent dyes, fluorescence degradation, solar radiation, spray deposition, drift, Basonyl, Eosine, Tinopal


    Author Information:

    Salyani, M
    Associate Professor of Agricultural Engineering, University of Florida, IFAS, Citrus Research and Education Center, Lake Alfred, Florida


    Paper ID: STP25135S

    Committee/Subcommittee: E35.22

    DOI: 10.1520/STP25135S


    CrossRef ASTM International is a member of CrossRef.