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Quality Evaluation and Residual Pesticides of Lettuce during Growth after Transplanting  

Youn, Aye-Ree (Korea Food Research Institute)
Kim, Byeong-Sam (Korea Food Research Institute)
Kim, Sang-Hee (Korea Food Research Institute)
Kwon, Ki-Hyun (Korea Food Research Institute)
Cha, Hwan-Soo (Korea Food Research Institute)
Publication Information
Food Science and Preservation / v.14, no.2, 2007 , pp. 124-130 More about this Journal
Abstract
Lettuce (Lactuca Sativa L.) is the most popular salad vegetable crop The purpose of this study was to analyze the quality of lettuce, and residual pesticides in this vegetable, during growth after transplanting. The eatable weight was 40% of the total weight at the commencement of transplanting, but had doubted at harvest after transplanting. As lettuce grew after transplanting, the pH, the sugar level, and the moisture content increased slightly, and the color tended towards yellow rather than greenThe SPDA chlorophyll measurement was 16.84 at 42 day post-ransplantation, and increased to 26.44 at 67 day after transplanting. The contents of vitamin C were 2.5mg/100g wet weight at 60 d after transplantation, but decreased to 2.2mg/100g wet weight 67 day post-transplantation. Mineral (Ca, Fe, K, Mg, and Na) levels rose after transplantation, and attained their highest levels 60 day post-transplantation. The lettuce crop was analyzed for residues of each of 48 pesticides nt 54 after transplantation, and the only such chemical detected was chlorthalonil(0.03 0.25mg/kg wet weight).
Keywords
Lettuce; quality evaluation; residual pesticides; after transplanting;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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