OPCW Proficiency Test: A Practical Approach Also for Interlaboratory Test on Detection and Identification of Pesticides in Environmental Matrices
Figure 14
(a) Extracted ion m/z 111 chromatogram of compounds III ( = 15.23 min) and IV ( = 15.36 min) in the soil sample. (b) Extracted ion m/z 111 chromatogram of synthesized O-2-methylpentyl-O-propyl ethylphosphonate III ( = 15.23 min), containing two symmetrical analogues: dipropyl ethylphosphonate ( = 12.13 min) and bis(O-2-methylpentyl) ethylphosphonate ( = 17.83 min).
