HPLC Separation of Agricultural Compounds Found in Tea

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Chromatogram

Description

Tea has been known to contain residue of pesticides and fungicides such as picoxystrobin and pyrimethanil. We used Primesep 200, a reversed-phase column with weakly acidic ion-pairing groups to separate picoxystrobin, pyrimethanil and atorvastatin. A 15 minute method used to demonstrate retention control when adjusting ratio of organic to aqueous in the mobile phase. Baseline retention with good resolution was achieved.

Method Parameters

Mobile PhaseMeCN/H2O – 45/55%, MeCN/H2O – 50/50%
BufferH2SO4 – 0.1 %
Flow Rate1.0 ml/min
DetectionUV, 250 nm
Class of CompoundsDrug, Statin, Hydrophobic, Ionizable
Analyzing CompoundsAtorvastatin, Picoxystrobin, Pyrimethanil, Lipitor

HPLC Column Used

Primesep 200, 4.6×150 mm, 5 µm, 100A