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Fluorimetric identification of sulfonamides by carbon dots embedded photonic crystal molecularly imprinted sensor array
Food Chemistry ( IF 8.8 ) Pub Date : 2022-11-24 , DOI: 10.1016/j.foodchem.2022.135045
Shishun Zhang 1 , Keman Shao 2 , Chengyi Hong 2 , Suyan Chen 2 , Zhengzhong Lin 2 , Zhiyong Huang 2 , Zhuzhi Lai 3
Affiliation  

Identification of sulfonamides (SAs) residues in food is vital for human health. A set of 4-channel sensor array was constructed by carbon dots (CDs) embedded in photonic crystal molecularly imprinted (PCMIP@CDs) film which included 3 PCMIP@CDs units and 1 PCNIP@CDs unit to determine typical SAs: sulfadimethoxine, sulfathiazole, sulfaguanidine, sulfamethazine, sulfadiazine. Under the optimal conditions, the response time of the sensor array was only 200 s. Moreover, 300 fluorescence response signals (4 sensor units × 5 sulfonamides × 3 concentrations × 5 repeats) were processed by pattern recognition technique to analyze the ability of the sensor array to recognize 5 kinds of SAs. Subsequently, the linear discrimination analysis (LDA) method was used to identify the five SAs simultaneously with 100 % classification accuracy and the limit of detection was 0.01–0.26 nmol/L. Moreover, the proposed method can effectively identify-five SAs in water and fish samples.



中文翻译:

碳点嵌入光子晶体分子印迹传感器阵列对磺胺类药物的荧光鉴定

食品中磺胺类药物 (SAs) 残留的鉴定对人类健康至关重要。由嵌入光子晶体分子印迹(PCMIP@CDs)薄膜的碳点(CDs)构成一组4通道传感器阵列,包括3个PCMIP@CDs单元和1个PCNIP@CDs单元,用于测定典型的SAs:磺胺二甲氧嘧啶、磺胺噻唑、磺胺胍、磺胺二甲嘧啶、磺胺嘧啶。在最优条件下,传感器阵列的响应时间仅为200 s。此外,通过模式识别技术处理300个荧光响应信号(4个传感器单元×5个磺胺类药物×3个浓度×5次重复)以分析传感器阵列识别5种SA的能力。随后,采用线性判别分析(LDA)方法同时鉴定5种SAs,分类准确率100%,检出限为0.01-0.26 nmol/L。此外,所提出的方法可以有效地识别水和鱼样品中的五种 SA。

更新日期:2022-11-24
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