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| 碳量子点/金复合材料荧光增强法测定食用油中TBHQ |
| Determination of TBHQ in edible oil by fluorescence enhancement method with carbon quantum dots/gold composite |
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| DOI： |
| 中文关键词: 碳量子点/金纳米 叔丁基对苯二酚 荧光增强 食用油 |
| 英文关键词:carbon quantum dots/gold nanocomposite TBHQ fluorescence enhancement edible oil |
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| 中文摘要: |
| 以碳量子点为稳定剂和还原剂，与氯金酸作用，制得碳量子点/金纳米复合材料（CQDs/Au）。叔丁基对苯二酚（TBHQ）可使CQDs/Au在445 nm处的荧光明显增强，由此建立了荧光测定TBHQ含量的新方法。考察了pH、反应时间、反应温度对试验的影响。结果表明：在pH 8.69的三酸缓冲溶液中，25?℃反应30 min时，体系荧光强度与TBHQ质量浓度呈现良好的线性关系，其线性范围为0.54~5.44 μg/mL，线性方程为y=24.29x+260.23，相关性系数为0.993 6，检出限为0.24 μg/mL。将该方法用于测定食用油中TBHQ含量，回收率可达91.9％~103.3％。表明该方法准确可靠、简便快速，适用于食用油中TBHQ的检测。 |
| 英文摘要: |
| The carbon quantum dots/gold nanocomposite (CQDs/Au) was prepared by reaction between carbon quantum dots and chloroauric acid，in which carbon quantum dots served as both reducing agent and stabilizer. TBHQ could induce fluorescence enhancement of CQDs/Au in 445 nm. Thus, a new method for determining the content of TBHQ was established. Different influencing factors were studied including pH,reaction time and reaction temperature. The results showed that in Britton-Robinson buffer solution with pH 8.69, reaction for 30 min at 25?℃ ,the system fluorescence intensity and TBHQ mass concentration had good linear relationship, and the linear range was 0.54-5.44 μg/mL. The linear equation was y=24.29x+260.23, the correlation coefficient was 0.993 6, the detection limit was 0.24 μg/mL. The method was used to determine the content of TBHQ in edible oil and the recovery rate was 91.9%-103.3%. The method was simple，accurate and rapid for the quantitative analysis of TBHQ in edible oil samples with satisfactory results. |
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