Development of a Solid-Phase Extraction (SPE) Cartridge Based on Chitosan-Metal Oxide Nanoparticles (Ch-MO NPs) for Extraction of Pesticides from Water and Determination by HPLC
Table 5
Efficiency of Ch-ZnO NPs in adsorption of different pesticides using solid phase extraction cartridge technique.
Pesticides
Removal () ± SE at three levels of concentration (mg/L)
Active ingredient () found in water ± SE
Total found ()
(Extracted in methanol / acetonitrile)
(Remaining in water sample)
10
50
100
10
50
100
10
50
100
Abamectin
98.72
93.15
92.63
0.00
1.84
2.51
98.72
94.99
95.15
Diazinon
94.28
76.12
72.55
5.25
18.08
23.01
99.54
94.15
95.56
Fenamiphos
95.21
93.33
87.20
4.34
4.42
7.52
99.55
97.75
94.72
Imidacloprid
96.90
97.76
88.47
1.69
2.21
10.42
99.58
99.97
98.88
Lambda-cyhalothrin
99.09
98.00
94.47
0.00
0.00
0.00
99.09
98.00
94.47
Methomyl
41.47
38.51
36.62
18.09
57.82
62.59
59.56
96.33
99.21
Thiophanate-methyl
90.62
60.60
60.10
3.49
6.66
12.34
94.11
72.44
The values lower than 100% mean the nonextracted amount of pesticide from Ch-ZnO NPs. Values are mean of three replicates and are given as mean ± standard error. Different letters in the same column indicate significant differences according to Student-Newman-Keuls (SNK) test (P≤0.05).
