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| Determination of TBHQ in edible oil by fluorescence enhancement method with carbon quantum dots/gold composite |
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| DOI： |
| KeyWord:carbon quantum dots/gold nanocomposite TBHQ fluorescence enhancement edible oil |
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| Abstract: |
| 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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