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Determination of chlorthal-diacid, dalapon and trysben in tea by non-derivatization coupled with liquid chromatography-tandem mass spectrometry
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Xia-Xue LI1, Qiao-Hui YANG1, Yun-Hua ZHENG2, Qiang LIAO2, Yan ZENG1, *, Shu-Ping YANG3, *
Journal of Food Safety & Quality | 2025, 16(11) : 146 - 153
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Journal of Food Safety & Quality | 2025, 16(11): 146-153
• Special Topic: Analysis and Monitoring of Toxic and Harmful Substances in Food •
Determination of chlorthal-diacid, dalapon and trysben in tea by non-derivatization coupled with liquid chromatography-tandem mass spectrometry
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Xia-Xue LI1, Qiao-Hui YANG1, Yun-Hua ZHENG2, Qiang LIAO2, Yan ZENG1, *, Shu-Ping YANG3, *
Affiliations
  • 1. Ya’an Agricultural Products Quality Monitoring and Inspection Center, Ya’an 625000, China
  • 2. Ya’an Quality Inspection and Testing Institute, Ya’an 625000, China
  • 3. Ganzi Tibetan Autonomous Prefecture Agricultural Product Quality and Safety Center, Ganzi 626000, China
Published: 2025-06-15 doi: 10.19812/j.cnki.jfsq11-5956/ts.20250206002
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Objective To establish a non-derivatized extraction method for the simultaneous determination of chlorthal-diacid, dalapon and trysben in tea by liquid chromatography-tandem mass spectrometry (LC-MS/MS) combined with hydrophile-lipophile balance (HLB) clean-up. Methods Tea samples were extracted by 20 mL of 1% acetic acid in water and 10 mL of methylene chloride; clean-up by HLB (300 mg/3 mL) filtration. Separation of the target analytes was achieved on an octadecylsilane (C18) chromatographic column, and quantitation was performed by LC-MS/MS in negative ion mode. Results The 3 kinds of herbicides were effectively separated on the C18 column with good linearity in the range of 0.01-2.00 μg/mL (r2>0.997). At 4 spiked levels of 0.05, 0.25, 0.50 and 1.00 mg/kg, the average recoveries of the 3 kinds of pesticides in the blank matrix of tea ranged from 71.1% to 119.2%, with the relative standard deviations between 3.3% and 18.3%. The limits of detection were ranged from 0.002-0.009 mg/kg, and the limits of quantitation were ranged from 0.008-0.029 mg/kg of the 3 kinds of herbicides. Conclusion The developed method offers a simple and rapid pretreatment procedure, eliminating the need for derivatization. It is friendly to the inspectors and the environment, and can be used as a method for large-scale detection of chlorthal-diacid, dalapon and trysben residues in tea.

chlorthal-diacid  /  dalapon  /  trysben  /  tea  /  non-derivatization  /  liquid chromatography-tandem mass spectrometry
Xia-Xue LI, Qiao-Hui YANG, Yun-Hua ZHENG, Qiang LIAO, Yan ZENG, Shu-Ping YANG. Determination of chlorthal-diacid, dalapon and trysben in tea by non-derivatization coupled with liquid chromatography-tandem mass spectrometry[J]. Journal of Food Safety & Quality, 2025 , 16 (11) : 146 -153 . DOI: 10.19812/j.cnki.jfsq11-5956/ts.20250206002
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Year 2025 volume 16 Issue 11
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Article Info
doi: 10.19812/j.cnki.jfsq11-5956/ts.20250206002
  • Receive Date：2025-02-06
  • Online Date：2025-07-14
  • Published：2025-06-15
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  • Received：2025-02-06
Funding
Affiliations
    1. Ya’an Agricultural Products Quality Monitoring and Inspection Center, Ya’an 625000, China
    2. Ya’an Quality Inspection and Testing Institute, Ya’an 625000, China
    3. Ganzi Tibetan Autonomous Prefecture Agricultural Product Quality and Safety Center, Ganzi 626000, China
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表12种不同金属材料的力学参数
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Family		 属数
Number of
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Number of
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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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