Isolation of Aflatoxin B1 from Moldy Foods by Solid-Phase Extraction Combined with Bifunctional Ionic Liquid-Based Silicas

Abstract

A solid-phase extraction method was developed by using new bifunctional ionic liquid-based silicas as sorbents to isolate aflatoxin B1 from moldy corn and peanut. Firstly, according to the adsorption efficiency, two sorbents imidazolium chloride-butylimidazolium chloride-based silica (Sil@BIm-Im) and imidazolium chloride-hexylimidazolium chloride-based silica (Sil@HIm-Im) were selected. The RSM was introduced to optimize adsorption conditions such as methanol/water ratio, time, and pH. Sil@HIm-Im, which had the highest adsorption efficiency, was used in SPE as a sorbent. After 2.0 mL of loading samples, washing solvents were optimized as 6.0 mL and 4.0 mL of water for corn and peanut, 2.0 mL of acetonitrile, and 3.0 mL of methanol. 3.0 mL of methanol/acetic acid (2.0% vol.) was investigated as an elution solvent. Finally, 0.009 μg/g and 0.023 μg/g of aflatoxin B1 were obtained in corn and peanut extract with recoveries of 80.0%–103.3% and RSDs of 2.37%–6.58%.

Recent Insights into Sample Pretreatment Methods for Mycotoxins in Different Food Matrices: A Critical Review on Novel Materials

“…With the emergence of new technologies and novel materials, sample pretreatment methods are also developing. Table S2 [ 11 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 , 58 , 59 , 60 , 61 , 62 , 63 , 64 , 65 , 66 , 67 , 68 , 69 , 70 , …”

Determination of Heavy Metal Ions and Organic Pollutants in Water Samples Using Ionic Liquids and Ionic Liquid-Modified Sorbents

“…In addition, IL maintains their properties when immobilized on substances. Therefore, IL-modified substances have been used in separations owing to their polarity, H-bonding, ion exchange, electrostatic interaction, and π - π interactions between the target and the IL functional groups [113–115]. According to the different target pollutants, the stability of the substances under different pH environments, type of anions, and cations with different alkyl chain lengths and additional functional groups on IL will obviously affect the adsorption efficiency.…”

Isolation of aristolochic acid I from herbal plant using molecular imprinted polymer composited ionic liquid‐based zeolitic imidazolate framework‐67

“…Ionic liquids (ILs) are well-known green reaction media with excellent chemical properties, such as hydrophilicity/hydrophobicity with different cations or anions, miscibility with several inorganic/organic solvents [18][19][20]. When the IL groups were modified on the surface of sorbents, they can provide a range of chemical bonds (hydrogen, ionic, π−π, et al) to increase the interaction between sorbents and target compounds [21].…”