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中国精品科技期刊2020
黎小椿,吴凤莲,庞永丰,等. 基于适配体调控碳点催化反应的SERS法检测农残啶虫脒[J]. 食品工业科技,2021,42(9):236−244. doi: 10.13386/j.issn1002-0306.2020050342.
引用本文: 黎小椿,吴凤莲,庞永丰,等. 基于适配体调控碳点催化反应的SERS法检测农残啶虫脒[J]. 食品工业科技,2021,42(9):236−244. doi: 10.13386/j.issn1002-0306.2020050342.
LI Xiaochun, WU Fenglian, PANG Yongfeng, et al. Detection of Pesticide Residue Acetamiprid by SERS Based on Aptamers Regulating Carbon Dots Catalytic Reactions [J]. Science and Technology of Food Industry, 2021, 42(9): 236−244. (in Chinese with English abstract). doi: 10.13386/j.issn1002-0306.2020050342.
Citation: LI Xiaochun, WU Fenglian, PANG Yongfeng, et al. Detection of Pesticide Residue Acetamiprid by SERS Based on Aptamers Regulating Carbon Dots Catalytic Reactions [J]. Science and Technology of Food Industry, 2021, 42(9): 236−244. (in Chinese with English abstract). doi: 10.13386/j.issn1002-0306.2020050342.

基于适配体调控碳点催化反应的SERS法检测农残啶虫脒

Detection of Pesticide Residue Acetamiprid by SERS Based on Aptamers Regulating Carbon Dots Catalytic Reactions

  • 摘要: 本文将表面增强拉曼散射(Surface-enhanced Raman scattering,SERS)分析方法与适配体和碳基纳米酶有机结合,建立蔬菜中农残啶虫脒(acetamiprid,AC)的检测方法。结果表明,在水浴温度80 ℃、反应时间20 min及CDN/Ag1、柠檬酸三钠、AgNO3、Apt、NaCl、VBB浓度分别为169.35 µg/L、6.45 mmol/L、0.90 mmol/L、22.93 nmol/L、12.90 mmol/L、0.323 µmol/L的条件下,AC-Apt-CDN/Ag1-AgNO3-柠檬酸三钠-VBB体系在1617 cm−1处的SERS峰强度增加值(ΔI1617 cm_^-1 )与14.30~457.67 nmol/L的AC浓度呈良好的线性关系,决定系数为0.9967,检出限为10.03 nmol/L。据此,建立了一种简单、快速、灵敏度高、重现性好的AC检测方法。体系在测定85.80 nmol/L啶虫脒时,共存物质Mg2+、Na+、Cu2+、Zn2+、Al3+、Ba2+、Fe3+、K+、NH4+、CO32−、NO3、SO42−、Cl、HCO32−、多菌灵、吡虫啉、特拉津、毒死蜱、丙酮在浓度为8.580 µmol/L时不干扰测定,Ca2+浓度为6.864 µmol/L时不干扰测定。该法用于测定小白菜、黄瓜和西红柿中的AC,回收率在98.27%~101.78%,相对标准偏差分为2.31%、0.83%和1.69%,方法可行。

     

    Abstract: In this paper, surface-enhanced Raman scattering (SERS) method was combined with aptamers and carbon-based nanoenzymes to establish a method for the determination of agricultural residue acetamiprid (AC) in vegetables. Results showed that, under the conditions of 80 ℃ water bath, 20 min reaction time and concentration of CDN/Ag1, trisodium citrate, AgNO3, Apt, NaCl, VBB was 169.35 µg/L, 6.45 mmol/L, 0.90 mmol/L, 22.93 nmol/L, 12.90 mmol/L, 0.323 µmol/L respectively, the AC-Apt-CDN/Ag1-AgNO3-trisodium citrate-VBB system showed a good linear relationship between the increase of SERS peak strength at 1617 cm−1 (ΔI1617 cm_^-1 ) and the AC concentration in the range of 14.30~457.67 nmol/L. The coefficient of determination was 0.9967. The detection limit was 10.03 nmol/L. Based on this, a simple, rapid, highly sensitive and reproducible method for the determination of trace AC was established. When the concentration of acetamiprid was 85.80 nmol/L, co-existing substances Mg2+, Na+, Cu2+, Zn2+, Al3+, Ba2+, Fe3+, K+, NH4+, CO32−, NO3, SO42−, Cl, HCO32−, carbendazim, imidacloprid, atrazin, chlorpyrifos and acetone did not interfere with the determination at the concentration of 8.580 µmol/L, and Ca2+ did not interfere with the determination at the concentration of 6.864 µmol/L. The method was applied to the determination of AC in cabbage, cucumber and tomato. The recovery rate was 98.27%~101.78%, and the relative standard deviations were 2.31%, 0.83% and 1.69%. The method was feasible.

     

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