A rapid and simple method for determining the plant growth regulator hexanoic acid 2-(diethylamino) ethyl ester (DA-6) in pakchoi and soil using gas chromatography-mass spectrometry (GC-MS) has been developed. For this purpose, a single step was used to extract DA-6 with dichloromethane from aqueous-acetone extracts of vegetables and soil. Average recoveries of DA-6 in pakchoi and soil were between 85% and 104% at both spiking levels 0.01 and 0.1 mg kg-1. Relative standard deviations (RSD) were less than 11% for all of the recovery tests. The degradation of DA-6 in pakchoi and soil was studied. The results showed that DA-6 degradation in pakchoi and soil coincided with C = 3.9903 e-0.0516t, C = 0.3476 e-0.0224t, respectively; the half-lives were 13.43 h and 30.94 h in pakchoi and soil in Beijing, respectively.
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hexanoic acid 2-(diethylamino) ethyl ester;
Document Type: Research Article
College of Science, China Agricultural University, Beijing, P.R. China
College of Science, China Agricultural University, Beijing, P.R. China,College of Plant Protection, Qingdao Agricultural University, Qingdao, Shandong Province, P.R. China
July 1, 2008
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