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用溶胶－凝胶法研制二苯蒽－二氧化硅试剂相．试剂相在有机溶剂中稳定，未见探针泄漏．应用于测定正己烷中单质疏，在1．0～50.0μg·mL-1浓度范围内单质硫浓度C与lg（F0／F）成线性，检出限为0.3μg·mL－1，方法的平均回收率为103±4．4％，日内、日间精密度为1．8％～7．2％．
Preparation of dibenzyl anthracene - silica reagent phase by sol - gel method. The reagent phase is stable in organic solvents and no probe leaks. The method was applied to the determination of simple substance sparseness in n-hexane. The concentration of elemental sulfur C was linear with lg (F0 / F) within the range of 1.0-50.0μg · mL-1. The detection limit was 0.3μg · mL- The average recovery was 103 ± 4.4%. The intra-day and inter-day precision was 1.8% -7.2%.