Table 3. Comparison of 4 types of clean-up columns in terms of recovery, matrix effect, solvents and time consumption

Cleanup methods HLB Envi-Carb-NH2 QuEChERS SinChERS
Recoveries (%) F 76 70 92 100
FD 85 73 94 99
FS 77 68 89 88
FSO 74 69 95 97
Matrix effect (%) F −1.00 −4.40 −2.70 1.10
FD 17.60 7.60 11.40 10.60
FS 20.40 6.90 16.30 16.20
FSO 19.30 8.70 14.50 13.40
Solvent consumption Acetonitrile 130 mL Acetone 40 mL, dichloromethane 30 mL Acetonitrile 10 mL Acetonitrile 10 mL
Time spent (h) 4.5 6.5 2.0 1.5
F: fipronil; FD, fipronil desulfinyl; FS, fipronil sulfide; FSO, fipronil sulfone; QuEChERS, quik-easy-cheap-effective-rugged-safe method; SinChERS, single-step, cheap, effective, rugged, safe-based method.