Dissipation of the plant growth regulator hexanoic acid 2-(diethylamino) ethyl ester in pakchoi and soil |
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| Authors: | Hongyan Zhang Liuqing Xie Pengjun Xu |
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| Institution: | 1. College of Science, China Agricultural University , Beijing, P.R. China;2. College of Science, China Agricultural University , Beijing, P.R. China;3. College of Plant Protection, Qingdao Agricultural University , Qingdao, Shandong Province, P.R. China |
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| Abstract: | 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?0.0516 t , C = 0.3476 e?0.0224 t , respectively; the half-lives were 13.43 h and 30.94 h in pakchoi and soil in Beijing, respectively. |
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| Keywords: | hexanoic acid 2-(diethylamino) ethyl ester pakchoi soil degradation |
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