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. 2020 May 7;10(30):17870–17880. doi: 10.1039/d0ra00811g

Verification of the recovery rates in various concentrations (in acidic soil, pH 5.52)a.

Compd HPLC analysis condition Extraction solvent (v/v) Additive concentration (mg kg−1) Average recovery ratio (%) Coefficient of variation R2 (%)
Wavelength Flow rate Mobile phase (v/v)
M01 225 nm 0.8 mL min−1 CH3OH : H2O (pH 3.0) = 53/47 CH3COCH3 : CH2Cl2 : phosphoric acid solution (pH 2.0) = 40/5/5 5 79.64 3.98
2 82.65 1.55
0.5 87.11 1.97
M02 225 nm 0.8 mL min−1 CH3OH : H2O (pH 3.0) = 53/47 CH3COCH3 : CH2Cl2 : phosphoric acid solution (pH 2.0) = 40/5/5 5 83.39 1.47
2 84.58 2.29
0.5 95.83 1.10
M03 225 nm 0.8 mL min−1 CH3OH : H2O (pH 3.0) = 60/40 CH3COCH3 : CH2Cl2 : phosphoric acid solution (pH 2.0) = 40/5/5 5 81.13 2.57
2 76.66 2.37
0.5 75.89 2.47
M04 225 nm 0.8 mL min−1 CH3OH : H2O (pH 3.0) = 65/35 CH3COCH3 : CH2Cl2 : Phosphoric acid solution (pH 2.0) = 40/5/5 5 81.80 3.25
2 79.78 1.25
0.5 78.59 0.90
M05 225 nm 0.8 mL min−1 CH3OH : H2O (pH 3.0) = 63/43 CH3COCH3 : CH2Cl2 : phosphoric acid solution (pH 2.0) = 40/5/5 5 81.00 1.56
2 78.41 3.85
0.5 73.62 2.93
N01 235 nm 0.8 mL min−1 CH3OH : H2O (pH 3.0) = 70/30 CH3COCH3 : THF : CH2Cl2 : phosphoric acid solution (pH 2.0) = 30/10/10/10 5 88.92 2.23
2 85.45 2.87
0.5 75.15 1.66
N02 230 nm 0.9 mL min−1 CH3OH : H2O (pH 3.0) = 75/25 CH3COCH3 : THF : CH2Cl2 : phosphoric acid solution (pH 2.0) = 30/10/10/10 5 79.52 0.84
2 73.57 2.41
0.5 72.58 0.49
N03 225 nm 0.7 mL min−1 CH3OH : H2O (pH 3.0) = 72/28 CH3COCH3 : THF : CH2Cl2 : phosphoric acid solution (pH 2.0) = 30/10/10/10 5 88.15 3.09
2 85.01 0.80
0.5 80.00 0.87
N04 230 nm 0.7 mL min−1 CH3OH : H2O (pH 3.0) = 68/32 CH3COCH3 : THF : CH2Cl2 : phosphoric acid solution (pH 2.0) = 30/10/10/10 5 84.53 0.40
2 73.51 2.89
0.5 83.89 1.86
N05 230 nm 1.0 mL min−1 CH3OH : H2O (pH 3.0) = 75/25 CH3COCH3 : THF : CH2Cl2 : phosphoric acid solution (pH 2.0) = 30/10/10/10 5 95.28 1.15
2 92.11 2.38
0.5 85.50 2.92
N06 230 nm 1.0 mL min−1 CH3OH : H2O (pH 3.0) = 75/25 CH3COCH3 : THF : CH2Cl2 : phosphoric acid solution (pH 2.0) = 36/12/12/12 5 75.33 3.30
2 76.97 1.92
0.5 75.13 1.10
N07 225 nm 0.9 mL min−1 CH3OH : H2O (pH 3.0) = 78/22 CH3COCH3 : THF : CH2Cl2 : phosphoric acid solution (pH 1.5) = 36/15/15/12 5 77.05 2.48
2 79.71 2.04
0.5 79.79 0.61
N08 230 nm 0.9 mL min−1 CH3OH : H2O (pH 3.0) = 75/25 CH3COCH3 : THF : CH2Cl2 : H3PO4 aqueous solution (pH 2.0) = 30/10/10/10 5 74.10 2.96
2 78.17 2.25
0.5 74.32 2.69
N09 225 nm 0.9 mL min−1 CH3OH : H2O (pH 3.0) = 76/24 CH3COCH3 : THF : CH2Cl2 : phosphoric acid solution (pH 2.0) = 30/10/10/10 5 80.53 7.16
2 73.28 2.38
0.5 74.06 0.37
N10 230 nm 1.0 mL min−1 CH3OH : H2O (pH 3.0) = 78/22 CH3COCH3 : THF : CH2Cl2 : phosphoric acid solution (pH 1.5) = 36/12/12/5 5 75.01 2.88
2 74.30 2.90
0.5 77.05 2.40
N11 230 nm 1.0 mL min−1 CH3OH : H2O (pH 3.0) = 80/20 CH3COCH3 : THF : CH2Cl2 : phosphoric acid solution (pH 1.5) = 36/12/12/5 5 72.75 2.14
2 77.47 1.01
0.5 72.61 2.43
N12 230 nm 0.9 mL min−1 CH3OH : H2O (pH 3.0) = 75/25 CH3COCH3 : THF : CH2Cl2 : phosphoric acid solution (pH 2.0) = 30/10/10/10 5 77.35 1.24
2 84.32 2.94
0.5 86.93 2.10
N13 230 nm 1.0 mL min−1 CH3OH : H2O (pH 3.0) = 80/20 CH3COCH3 : THF : CH2Cl2 : phosphoric acid solution (pH 2.0) = 30/10/10/10 5 75.17 2.22
2 72.08 0.82
0.5 77.26 2.35
Chlorsulfuron 235 nm 0.8 mL min−1 CH3OH : H2O (pH 3.0) = 60/40 CH3COCH3 : CH2Cl2 : phosphoric acid solution (pH 2.0) = 40/5/5 5 79.41 2.32
2 79.34 2.26
0.5 83.54 3.46
a

H2O (pH 3.0) was acidified with H3PO4.