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Dissipation of the plant growth regulator hexanoic acid 2-(diethylamino) ethyl ester in pakchoi and soil

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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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Keywords: degradation; hexanoic acid 2-(diethylamino) ethyl ester; pakchoi; soil

Document Type: Research Article

Affiliations: 1: College of Science, China Agricultural University, Beijing, P.R. China 2: College of Science, China Agricultural University, Beijing, P.R. China,College of Plant Protection, Qingdao Agricultural University, Qingdao, Shandong Province, P.R. China

Publication date: July 1, 2008

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