Magnetic solid phase extraction employing a novel restricted access material based on mesoporous polyaniline coated with hydrophilic monomers and casein for determination of antibiotics in milk samples

Restricted access polypyrrole employed in pipette-tip solid-phase extraction for determination of nimodipine and nicardipine in breast milk

“…Besides, HMs showed an absorption band at around 1700 cm −1 referring to the bond CO and CAS showed a band at around 1683 cm −1 due to CN stretching, which confirms the presence of crosslinking between casein and glutaraldehyde and band attributed to the carboxylate group (O–C–O) at 1415 cm −1 . 20–22,27,28…”

“…PPy and PPy–HM showed an apparently similar structure (spongy), which changed considerably after coating with CAS, confirming that a RAM has been successfully obtained. 20–22…”

Emerging Applications of Versatile Polyaniline-Based Polymers in the Food Industry

“…In addition, magnetic mesoporous PANI coated with hydrophilic monomers and casein for solid-phase extraction coupled with HPLC was able to simultaneously determine a wide array of antibiotics in milk samples with recoveries as close as 100%. These included doxycycline, oxytetracycline, trimethoprim, and penicillin G [ 149 ]. Similarly, PANI/GO was used for the electrochemically controlled SPME of antibiotics—specifically, tetracyclines—in milk samples, with recoveries ranging from 71% to 104% [ 150 ].…”

Magnetic solid‐phase extraction of organophosphorus pesticides from apple juice and environmental water samples using magnetic graphene oxide coated with poly(2‐aminoterephthalic acid‐co‐aniline) nanocomposite as a sorbent

“…Polyaniline (PANI), due to having various beneficial properties such as hydrophobicity, strong affinity with many inorganic and organic compounds, π‐conjugated structure, high sorption capacity, polar groups, resistance to heat and acidic/alkaline solutions, as well as mechanical and chemical stability, is a promising sorbent for extraction methods [18]. In recent years, PANI mixtures were applied as a sorbent in various extraction methods such as SPME [19], SPE [20], and MSPE [21]. Note that, 2‐aminoterephthalic acid (2‐ATA) is a good choice for aniline polymerization due to its two aromatic ring‐associated COOH groups.…”