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Colorimetric Detection of Organophosphate Pesticides in Cabbage Sample with Gold Nanostar/Pt as an Oxidase Mimic
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Siqi WU1, Sisi CHEN1, Xingyu ZUO1, Zhiting ZHENG1, Xuanbing YU2, 3, Chengyi HONG1, *, Kailong ZHANG2, *, Quansheng CHEN1
Science and Technology of Food Industry | 2026, 47(3) : 275 - 283
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Science and Technology of Food Industry | 2026, 47(3): 275-283
• Analysis and Determination •
Colorimetric Detection of Organophosphate Pesticides in Cabbage Sample with Gold Nanostar/Pt as an Oxidase Mimic
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Siqi WU1, Sisi CHEN1, Xingyu ZUO1, Zhiting ZHENG1, Xuanbing YU2, 3, Chengyi HONG1, *, Kailong ZHANG2, *, Quansheng CHEN1
Affiliations
  • 1Fujian Provincial Key Laboratory of Food Microbiology and Enzyme Engineering, College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China
  • 2Fujian Province Universities Key Laboratory of Preventive Veterinary Medicine and Biotechnology, College of Life Science, Longyan University, Longyan 364000, China
  • 3School of Life Sciences, Fujian Normal University, Fuzhou 350117, China
Published: 2026-02-01 doi: 10.13386/j.issn1002-0306.2025010077
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In view of the serious threat of organophosphorus pesticide (OPs) residues to the environment and human health, it is important to develop a rapid, sensitive and enzyme-free detection method to solve the problems of existing technologies that rely on biological enzymes, high cost and complex operation. In this study, gold nanostars (AuNS) were synthesized by seed-mediated growth method, and platinum nanoparticles were loaded on their surface to prepare AuNS/Pt nanocomposites (AuNS@Pt). The synthesized AuNS@Pt exhibited oxidase-like activity, whose catalytic mechanism was elucidated through kinetic analyses. Capitalizing on the inhibitory effect of OPs on the active sites of AuNS@Pt, a novel colorimetric detection platform was developed. AuNS@Pt could efficiently catalyze the oxidation of TMB to generate blue products (characteristic absorption peak 652 nm). The adsorption of OPs (dimethoate, omethoate, malathion) inhibited its catalytic activity. The absorbance value was linearly related to the concentration of OPs within a certain range, and the limit of detection were 0.015, 0.022 and 0.050 μg/mL, respectively. The recoveries of spiked cabbage samples ranged from 85.6% to 103.2%, with relative standard deviation below 5.18%, which was consistent with the results of gas chromatography-mass spectrometry. The proposed method provides a new strategy for the rapid detection of OPs and is suitable for practical application in complex matrix samples.

organophosphate pesticides  /  bimetallic nanomaterials  /  oxidase-like activity  /  colorimetric detection
伍思琪, 陈思思, 左星宇, 郑枳亭, 余宣炳, 洪诚毅, 张凯龙, 陈全胜. 基于金纳米星/铂类氧化物模拟酶的白菜中有机磷比色检测. 食品工业科技, 2026 , 47 (3) : 275 -283 . DOI: 10.13386/j.issn1002-0306.2025010077
Siqi WU, Sisi CHEN, Xingyu ZUO, Zhiting ZHENG, Xuanbing YU, Chengyi HONG, Kailong ZHANG, Quansheng CHEN. Colorimetric Detection of Organophosphate Pesticides in Cabbage Sample with Gold Nanostar/Pt as an Oxidase Mimic[J]. Science and Technology of Food Industry, 2026 , 47 (3) : 275 -283 . DOI: 10.13386/j.issn1002-0306.2025010077
Appendix
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Year 2026 volume 47 Issue 3
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Article Info
doi: 10.13386/j.issn1002-0306.2025010077
  • Receive Date：2025-01-09
  • Online Date：2026-10-25
  • Published：2026-02-01
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  • Received：2025-01-09
Affiliations
    1Fujian Provincial Key Laboratory of Food Microbiology and Enzyme Engineering, College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China
    2Fujian Province Universities Key Laboratory of Preventive Veterinary Medicine and Biotechnology, College of Life Science, Longyan University, Longyan 364000, China
    3School of Life Sciences, Fujian Normal University, Fuzhou 350117, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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