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
  
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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Author NameAffiliation
LI Manxiu, LI Haiping, REN Guangming,etc  
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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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