Research Article

OPCW Proficiency Test: A Practical Approach Also for Interlaboratory Test on Detection and Identification of Pesticides in Environmental Matrices

Figure 4

(a) TIC and (b) extracted ion chromatogram at m/z 111 of the methylated water sample showing presence of methyl derivatives of two spiking chemicals at = 10.98 and 11.16 min.
542357.fig.004a
(a)
542357.fig.004b
(b)