کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7615213 | 1493987 | 2018 | 33 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Supercritical fluid chromatographic-tandem mass spectrometry method for monitoring dissipation of thiacloprid in greenhouse vegetables and soil under different application modes
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کلمات کلیدی
MRMABPRUPC2MEKCSFC-MS/MSGCBUPLCRCFPSAESIRSDLOQt1/2 - t1 / 2primary secondary amine - آمین اولیه اولیهrelative standard deviation - انحراف استاندارد نسبیThiacloprid - تایل کلرپیدEnzyme-linked immunosorbent assay - تست الیزاELISA - تست الیزاGreenhouse vegetables - سبزیجات گلخانه ایlimit of quantification - محدودیت اندازه گیریDegradation rates - میزان تخریبMultiple-reaction monitoring - نظارت چند واکنشrelative centrifugal force - نیروی گریز از مرکز نسبیHalf-life - نیمه عمرMicellar electrokinetic chromatography - کروماتوگرافی الکترو کینتیک میکسلUltrahigh-performance liquid chromatography - کروماتوگرافی مایع با عملکرد فوق العاده بالاhigh-performance liquid chromatography - کروماتوگرافی مایعی کاراHPLC - کروماتوگرافی مایعی کاراUltra-performance convergence chromatography - کروماتوگرافی همگرایی فوق العاده عملکردیgraphitized carbon black - گرافیتی کربن سیاهelectrospray ionization - یونیزاسیون الکترو اسپری
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
A rapid, sensitive and effective supercritical fluid chromatographic-tandem mass spectrometry (SFC-MS/MS) method was developed to analyze thiacloprid for the first time. The SFC-MS/MS conditions were optimized with the ultra-performance convergence chromatography (UPC2) BEH column (100â¯mmâ¯Ãâ¯3.0â¯mm, 1.7â¯Î¼m particle size) and thiacloprid was eluted at 1.22â¯min in gradient mode with CO2/methanol as mobile phase. The 0.1% formic acid in methanol (v/v) was used as postcolumn compensation solution to improve sensitivity. The ABPR pressure, flow rate of mobile phase and flow rate of compensation pump were set at 1800â¯psi, 1.8â¯mL/min, and 0.1â¯mL/min, respectively. The average recoveries of thiacloprid in soil at four spiking levels (5, 10, 100, 1000â¯Î¼g/kg) ranged between 78.8% and 107.1% with relative standard deviations (RSDs) lower than 12.2% and the limit of quantitation (LOQ) was 5â¯Î¼g/kg. The proposed method can distinctly improve the analysis efficiency by 2-12 times and reduce the solvent consumption by 5%-95% compared with reported methods. It was applied to investigate the dissipation rates of thiacloprid in greenhouse vegetables and soil under different application modes. The half-lives of thiacloprid in cucumber and soil were 9.55-20.44â¯days and 3.74-9.14â¯days separately under different application modes, 10.60â¯days in tomato under foliar spraying. The residues in vegetables under root irrigation were all less than that under foliar spraying. The results could offer useful data for risk assessment of thiacloprid in agricultural production.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Chromatography B - Volumes 1081â1082, 1 April 2018, Pages 25-32
Journal: Journal of Chromatography B - Volumes 1081â1082, 1 April 2018, Pages 25-32
نویسندگان
Runan Li, Zenglong Chen, Fengshou Dong, Jun Xu, Xingang Liu, Xiaohu Wu, Xinglu Pan, Yan Tao, Yongquan Zheng,