FOOD SCIENCE ›› 2009, Vol. 30 ›› Issue (20): 299-302.doi: 10.7506/spkx1002-6300-200920065

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GC-MS Determination of Dinitroaniline Herbicides Multi-residues in Soybean

HUO Jiang-lian1,2，YU Jing3，CHU Xiao-gang4，LI Jun5，FU Jia6，GE Yi-qiang2,7,*，LI Yan1，WANG Bi-na1   

  1. 1. Station of Tea Quality Supervision and Examination, Beijing Food Research Institute, Beijing 100162, China ；2. College of Food
    Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China ；3. Beijing Products Quality Supervision
    and Inspection Institute, Beijing 100071, China；4. Institute of Food Safety, Chinese Academy of Inspection and Quarantine
    Science, Beijing 100025, China；5. Hebei Normal University of Science and Technology, Qinhuangdao 066600, China；
    6. Section for Food Quality Supervision and Control, Xuanwu District Bureau of Beijing Administration for Industry and Commerce,
    Beijing 100054, China；7. China Rural Technology Development Center, Ministry of Science and Fechnology,
    Beijing 100045, China
  • Received:2008-06-05 Online:2009-10-15 Published:2010-12-29
  • Contact: GE Yi-qiang E-mail:gyq@crtdc.org.cn

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Abstract:

A method using solid phase extraction-gas chromatography-mass spectrometry (SPE-GC-MS) was presented for the determination of dinotroaniline herbicides (trifluralin, benfluralin, ethalfluralin, profluralin, fluchloralin, dinitramine, prodiamine, isopropalin, butralin, pendimethalin and nitralin) in soybean. The procedure was based on extraction of test portions using acetonitrile saturated with petroleum ether, removal of lipid by liquid-liquid extraction method, clean-up and enrichment using a Florisil column with 5 ml of a mixture composed of ethyl acetate and n-hexane (2:8, V/V) as the eluant. The analytes were quantitatively determined using an external calibration method. The average spike recoveries for six replicate determinations at two levels ranged 80%－100% and 71%－110%, respectively, with a relative standard deviation (RSD) of less than 13%. This analytical method exhibited a limit of detection (LOD) ranging 0.25－0.32 μg/kg and a limit of quantification (LOQ) ranging 0.7－0.96 μg/kg.

Key words: dinitroanilines, soybean, multi-residues, gas chromatography-mass spectrometry (GC-MS)

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