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Example of GC system adsorption of pesticide spectra

 Last Update: 2021-09-08
 Source: Internet
 Author: User

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principles instrumental analysis

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After a period of sample injection in the GC, the system is covered by non-volatile impurities, which will affect the peaks of some organophosphorus pesticides with strong polarity

Figure 2-19 The normal peaks of acephate and omethoate standard GC

Figure 2-20 The standard of acephate and omethoate becomes weaker and smaller

In addition, there is another situation where the matrix effect causes the retention time of the peak to change.

Figure 2-21 The retention time of the phoxim standard in the sample has shifted

Related Links: Chromatogram Analysis of Gas Chromatography Detection

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