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China Surfactant Detergent & Cosmetics ›› 2019, Vol. 49 ›› Issue (12): 795-800.doi: 10.3969/j.issn.1001-1803.2019.12.005

• Development and application • Previous Articles     Next Articles

Study on removal of pesticide residues by microemulsion fruit and vegetable detergents

LIU Dong1,ZHANG Yun1,SHANG Meng2,NI Xin-jiong2,CAO Yu-hua2   

  1. 1. Suzhou Greenleaf Daily Commodity Co., Ltd., Suzhou, Jiangsu 215151, China
    2. School of Chemical and Material Engineering, Jiangnan University, Wuxi, Jiangsu 214122, China
  • Received:2019-05-08 Revised:2019-11-22 Online:2019-12-22 Published:2019-12-24

Abstract:

The removal effect of microemulusion fruit and vegetable detergents on pesticide residue on vegetable surface was studied. The mixed pesticides containing acephate, omethoate, trichlorfon and cyhalothrin were sprayed on the surface of green vegetables. Then, the vegetables were collected on the 3rd, 7th, 14th, and 21th days after spraying, and washed with the microemulsion detergent, commercially available vegetable and fruit detergent for removing pesticide residue and tap water, respectively. The residues of four pesticides in green vegetable samples were determined. The removal effects of the three cleaning agents on different pesticides and pesticides at different harvest time were evaluated. It is found that with the extension of the harvest time of spraying pesticide, the four pesticide residues in green vegetables decreased to varying degrees, but the cleaning efficiency decreased significantly. Microemulsion fruit and vegetable detergent have good removal effect on all of the four pesticides. The average removal rate of four pesticides in vegetables harvested on the 21st day after spraying is 63.90%, while the average removal rate of commercial vegetable and fruit detergent and tap water is only 44.88% and 20.76%, respectively. Owing to highly hydrophobic solubility and penetrability, the microemulsion detergent was suitable for removal of the highly hydrophobic pesticides and those penetrated into the organic outermost cuticle layer. In view of the good solubilization and permeability of the microemulsion fruit and vegetable detergents, it is suitable for the removal of hydrophobic pesticide residues in the surface of vegetables and fruits.

Key words: microemulsion, fruit and vegetable detergent, pesticide residues, surfactant

CLC Number: 

  • TQ423