A representative sample (50 g) of a particular soil
(black, red, sandy loam or clay) was transferred to 250 mL
Erlenmeyer flask. The soil sample was fortified with imidacloprid
at two different fortification levels: LOQ and
10 9 LOQ, separately. A volume of 0.5 and 5.00 mL
imidacloprid solution was transferred to each conical flask
for 0.02 and 0.20 ppm fortification levels. In case of water,
samples at pH 4, 7 and 9 (25 mL) were transferred into
volumetric flask 50 mL capacity and fortified with imidacloprid
at LOQ and 10 9 LOQ levels separately. A Volume
of 0.25 and 2.5 mL imidacloprid was transferred to
each volumetric flask for 0.02 and 0.20 ppm fortification
levels. The control samples were processed similarly where
in 0.25 and 2.5 mL acetonitrile was added