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KMID : 0380620100420010001
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Korean Journal of Food Science and Technology
2010 Volume.42 No. 1 p.1 ~ p.7
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Determination of Dithiocarbamates in Agricultural Products Circulated in Korea
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Kim Hee-Yun
Cheong So-Young
Lee Hwa-Jung
Choi Sun-Hee
Seo Eun-Chae
CHoi Hee-Ju
Eom Ji-Yoon
Choi Sung-Hee
Choi Jae-Chun
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Abstract
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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 R2, LOD and LOQ in the range of 0.5-107.3 mg/L were as follows: DCC: y=174.34x+18.315, R2=0.9999, 0.01 mg/L, and 0.04 mg/L; EBDC: y=227.38x?14.715, R2=1.0000, 0.01mg/L and 0.02 mg/L; PBDC: y=38.46x?21.412, R2=0.9999, 0.04 mg/L, and 0.1 mg/L; ETU: y=52.752x?4.4819, R2=0.9?998, 0.02 mg/L and 0.03 mg/L; PTU: y=128.28x+4.4624, R2=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).
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KEYWORD
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Dithiocarbamates, DDC, EBDC, PBDC, ETU, PTU
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