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为研究测定石油制品中藏化物的光纤化学传感器提供实验基础。用溶胶-凝胶法制备芘丁酸-二氧化硅敏感膜(试剂项),根据荧光多元猝灭响应的原理分别测定正己烷中噻吩、正辛硫醇及单质硫的含量。结果:噻吩、正辛硫醇及单质硫分别在10.6-265μg/ml、0.84-16.80μg/ml、0.75-15.0μg/ml浓度范围内与lg(F0/F)成线性关系,相关系数分别为0.9984、0.9981、0.9993。检出限分别为10.6μg/ml、0.81μg/ml、0.75μg/ml,平均回收率分别为105.0±7.7％、103.2±7.5％、97.5±1.4％。结论:用芘丁酸-二氧化硅试剂相分别测定正已烷溶液中的噻吩、正辛硫醇及单质硫的含量可取得较好的精密度,回收率和可逆度。
It provides an experimental basis for the study of optical fiber chemical sensors for determination of petroleum products. The pyrene butyric acid - silica sensitive membrane (reagent item) was prepared by sol - gel method. The contents of thiophene, n - octanethiol and elemental sulfur in n - hexane were determined respectively according to the principle of fluorescence multiple quenching reaction. Results: Thiophene, n-octylthiol and elemental sulfur had a linear relationship with lg (F0 / F) in the range of 10.6-265μg / ml, 0.84-16.80μg / ml and 0.75-15.0μg / ml, respectively. The correlation coefficients were 0.9984, 0.9981, 0.9993. The detection limits were 10.6μg / ml, 0.81μg / ml and 0.75μg / ml respectively. The average recoveries were 105.0 ± 7.7%, 103.2 ± 7.5% and 97.5 ± 1.4%, respectively. Conclusion: The determination of thiophene, n-octylthiol and elemental sulfur content in n-hexane solution with pyrene butyric acid-silica reagent can achieve better precision, recovery and reversibility.