Residual Pesticide (methamidophos)
Capillary GC has been adopted in Japan for the majority of official testing methods for residual pesticides in foods. Using a selective detector such as FPD, FTD, or ECD enables highly sensitive analysis of trace pesticides. GC analysis was conducted on 11 organophosphate pesticide components, including methamidophos.
The results achieved excellent separation and sensitivity. The GC-FPD (gas chromatograph (GC) with flame photometric detector (FPD)) used for this analysis is the ideal instrument for the highly sensitive analysis of organophosphate compounds.
A gas chromatograph (GC) measures the content of various components in a sample. The sample solution injected into the instrument enters a gas stream, which transports the sample into a separation tube known as the "column." Helium or nitrogen is used as this carrier gas. The components are separated inside the column. The detector measures the quantity of the components that exit the column. To measure a sample with an unknown concentration, a standard sample with a known concentration is injected into the instrument. The standard sample peak retention time (appearance time) and area are compared to the test sample to calculate the concentration.