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Determination of Dithiocarbamates in Agricultural Products Circulated in Korea  

Kim, Hee-Yun (Seoul Regional Korea Food and Drug Administration)
Choi, Hee-Ju (Korea Food and Drug Administration)
Eom, Ji-Yoon (Seoul Regional Korea Food and Drug Administration)
Seo, Eun-Chae (Seoul Regional Korea Food and Drug Administration)
Choi, Sung-Hee (Seoul Regional Korea Food and Drug Administration)
Cheong, So-Young (Seoul Regional Korea Food and Drug Administration)
Choi, Sun-Hee (Seoul Regional Korea Food and Drug Administration)
Lee, Hwa-Jeong (Korea Food and Drug Administration)
Choi, Jae-Chun (Gyeongin Regional Korea Food and Drug Administration)
Publication Information
Korean Journal of Food Science and Technology / v.42, no.1, 2010 , pp. 1-7 More about this Journal
Abstract
To revise the dithiocarbamates residue analysis method and survey the residues in agricultural products that were treated with these fungicides in Korea, we purchased 20 types of foodstuffs (rice, potato, cabbage, apple etc.) from markets in five major cities. 236 samples of the purchased foodstuffs were then analyzed for the presence of dithiocarbamates by HPLC/UV and HPLC/APCI-MS. The $R^2$, LOD and LOQ in the range of 0.5-107.3 mg/L were as follows: DCC: y=174.34x+18.315, $R^2=0.9999$, 0.01 mg/L, and 0.04 mg/L; EBDC: y=227.38x-14.715, $R^2=1.0000$, 0.01 mg/L and 0.02 mg/L; PBDC: y=38.46x-21.412, $R^2=0.9999$, 0.04 mg/L, and 0.1 mg/L; ETU: y=52.752x-4.4819, $R^2=0.9998$, 0.02 mg/L and 0.03 mg/L; PTU: y=128.28x+4.4624, $R^2=0.9998$, 0.02 mg/L, and 0.04 mg/L. The levels of DDC, EBDC, PBDC, ETU and PTU in 20 agricultural products fortified to 10.0-107.3 mg/L ranged from 61.7-117.5%, 65.3-110.1%, 61.5-109.6%, 69.3-116.3% and 70.2-97.2%, respectively. Overall, dithiocarbamates were detected in 100 samples and the detection ratio was 42.4%. Among these, only 3 samples (1.3%) of Lycii fructus had residue levels that were above the action limits, while the remaining samples (233 samples) contained levels of dithiocarbamates below the detection limit or below the Korea MRLs (Maximum Residue Limits).
Keywords
Dithiocarbamates; DDC; EBDC; PBDC; ETU; PTU;
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