| According to the structure of gas chromatograph and properties of organophosphorus pesticide,the solutions to common problems in determination of organophosphorus pesticide by gas chromatography,as high baseline noise,adsorption on active points,thermal decomposition and matrix induced response enhancement were studied. We suggested checking gas path fault,detector and external disturbance to reduce baseline noise; using glass insert and column correctly to eliminate active points; setting the temperature of injector and detector reasonably to prevent thermal decomposition; adopting matrix simplification procedures,matrix matched calibration standards and analyte protectants to avoid matrix induced response enhancement. |
