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KMID : 1059520210650060433
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Journal of the Korean Chemical Society
2021 Volume.65 No. 6 p.433 ~ p.440
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Analysis Method of Surfactants for Identification of Residue Dishwashing Detergent
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Park Na-Youn
Lee So-Jeong
Kim Jung-Hoan
Kho Young-Lim
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Abstract
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Surfactants are organic compounds that have both hydrophilic and non-polar parts in one molecule, classified as non-ion, anion, cation, and amphoteric surfactants according to the charge of hydrophilic parts in aqueous state. A trace amounts may remain when vegetables and fruits are washed using type1 detergent (Vegetable and fruit detergent), and there is a possibility of exposure to the human body through ingestion. This study developed the simultaneous analysis method for 5 surfactants with LC-MS/MS for analysis of detergent residues after washing vegetables and fruits with detergent. The mobile phase used distilled water and acetonitrile containing 50 mM ammonium formate and 0.1% formic acid and was analyzed using a gradient method using XBridge BEH C8 column. The accuracy of the established method was 83.9-112.1%, and the precision was less than 20%. The detection limit was 7.0 (SLS) to 29.0 (SLES-N3) μg/L, and the correlation coefficient (r2) of calibration line regression was greater than 0.99, it is considered suitable for the analysis of trace amounts of surfactant components remaining in vegetables and fruits.
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KEYWORD
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Surfactants, LC-MS/MS, LAS, SLES, AOS
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