Detection method of various pesticides in fertilizer
A detection method and technology for pesticides, which can be used in measurement devices, material separation, and analysis of materials, etc., can solve problems such as endangering food safety, agricultural product quality and taste, and achieve accurate results and low detection limits.
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[0033] Embodiment 1: the detection of pesticide in the water-soluble fertilizer sample
[0034] 1. Sample pretreatment
[0035] Shake and mix the water-soluble fertilizer sample, weigh about 0.5g of the sample into a 100mL volumetric flask, shake and dissolve with acetonitrile / water (50 / 50, v / v), make it to volume, and pass through a 0.22μm filter membrane in the inlet after mixing. Sample vials for LC-MS / MS determination. For samples whose content exceeds the linear range, the constant volume solution is further diluted so that the content is within the linear range of the instrument before being determined and quantified by LC-MS / MS.
[0036] 2. LC-MS / MS determination
[0037] Instrument: Agilent 1200 HPLC (Agilent, USA)-API2000 triple quadrupole tandem mass spectrometer (AB SCIEX, USA), equipped with electrospray (ESI) ion source;
[0038]Chromatographic column: Agilent XDB C18, 4.6×150mm, particle size 5μm;
[0039] Mobile phase: (A) water (containing 0.1% formic acid ...
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