Mixed mode monolithic sorbent in pipette tip for extraction of ractopamine and clenbuterol prior to analysis by HPLC-UV and UHPLC-Q ExactiveTM Plus Orbitrap MS

Journal of Analytical Science and Technology

Table 1 Weight of monomers, porogens, and initiator of the polymerization solutions

Percent of monomer:porogen	Monomer (g)		Porogen (g)		Initiator (g)	Permeability	Preparation success rate^a
Percent of monomer:porogen	MAA	EDMA	Toluene	1-Decanol	AIBN	Permeability	Preparation success rate^a
15:85	0.0155	0.1360	0.1022	0.7480	0.0015	High	30%
18:82	0.0191	0.1635	0.0984	0.7230	0.0018	Medium	95%
21:79	0.0222	0.1898	0.0955	0.6965	0.0021	Less	95%
23:77	0.0230	0.2080	0.0924	0.6776	0.0023	Less	95%

^aPercent monolith formed with good morphology and good adhesion to the tips (n = 20)