Simultaneous Determination of Plant Growth Regulators and Imidacloprid, Acetamiprid in Tea by Ultra Performance Liquid Chromatography-Tandem Mass Spectrometry / 分析化学
Chinese Journal of Analytical Chemistry
; (12): 529-536, 2017.
Article
em Zh
| WPRIM
| ID: wpr-511868
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WPRO
ABSTRACT
An efficient method for the analysis of multiclass plant growth regulators and pesticide (imidacloprid, acetamiprid) residues in tea was developed based on ultra-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS). The samples were extracted with acetonitrile/formic acid (99∶1, V/V) solution, cleaned up with four sorbents including C18, strong anion exchanger (SAX), primary secondary amine (PSA) and anhydrous MgSO4. The compounds were separated on a HSS T3 column under positive/negative electrospray ionization mode, detected by scheduled multiple reaction monitoring (SMRM), and quantified by matrix-matched external standard curves. All pesticide residues showed good linearity in the concentration range of 1-200 μg/L (6-benzylaminopurine, paclobutrazol, uniconazole, forchlorfenuron, mepiquat chloride, imidacloprid, acetamiprid) or 5-1000 μg/L (2,4-dichlor-ophenoxyacetic acid, 4-chlorophenoxyacetic acid, indole-3-acetic acid, gibberellic acid, 1-naphthaleneacetic acid, indole-3-butyric acid) , with correlation coefficient (R2≥0.99). Limits of detection (LOD, S/N=3) and limits of quantitation (LOQ, S/N=10) were 0.18-9.68 μg/kg and 0.61-32.26 μg/kg, respectively. In addition, the spiked recoveries of tea samples were 73.1%-108.9%, and RSDs were 0.6%-8.0%. This method was applied to commercial samples, and all the detections were confirmed by acquiring transitions for each pesticide in the samples.
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Base de dados:
WPRIM
Idioma:
Zh
Revista:
Chinese Journal of Analytical Chemistry
Ano de publicação:
2017
Tipo de documento:
Article