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p H、反应时间、反应温度对试验的影响。结果表明:在p H 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0.54~5.44μg/m L,线性方程为y=24.29x+260.23,相关性系数为0.993 6,检出限为0.24μg/m L。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。
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 buff- er 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.
作者
李满秀
李海平
任光明
贾左丽
贾佳
梁彦婷
LI Manxiu;LI Haiping;REN Guangming;JIA Zuoli;JIA Jia;LIANG Yanting(Department of Chemistry,Xinzhou Teachers University,Xinzhou 034000,Shanxi,Chin)
出处
《中国油脂》
CAS
CSCD
北大核心
2018年第7期145-148,共4页
China Oils and Fats
基金
山西省1331工程重点学科建设计划项目(2017)
忻州师范学院大学生科技创新项目(2016)
材料与计算化学山西省高等学校重点实验室基金
