Al-Degs Yahya S, Abu-Surrah Adnan S, Ibrahim Khalid A
Department of Chemistry, Hashemite University, P.O. Box 150459, Zarqa, 13115, Jordan.
Anal Bioanal Chem. 2009 Feb;393(3):1055-62. doi: 10.1007/s00216-008-2502-1. Epub 2008 Nov 13.
Selective polymeric extractants were prepared for preconcentration of Cibacron reactive red dye, a dye that is often applied with Cibacron reactive blue and Cibacron reactive yellow for dyeing of fabrics. The best extractant was fabricated (in chloroform) using methacrylic acid (as monomer), ethylene glycol dimethacrylate (as crosslinker), AIBN (as initiator for polymerization), and red dye as template molecule, with a molar stoichiometric ratio of 8.0:40.0:2.5:0.63, respectively. The structure of the molecularly imprinted polymer (MIP) was robust, and resisted dissolution up to 260 degrees C. Compared with the un-imprinted polymer, the imprinted product has a large specific surface area which improved its adsorption capacity. The effect of imprinting was obvious from the adsorption capacity measured at pH 4 for red dye (the imprinted molecule), which was increased from 24.0 to 79.3 mg g(-1) after imprinting. Equilibrium adsorption studies revealed that the dye-imprinted-polymer enables efficient extraction of red dye even in the presence of blue and yellow dyes which have similar chemical natures to the red dye. The selectivity coefficients S (red dye/dye), were 13.9 and 17.1 relative to the yellow and blue dyes, respectively. The MIP was found to be effective for red dye preconcentration, with a preconcentration factor of 100, from tap water and treated textile wastewater. The factors affecting extraction of red dye by the MIP were studied and optimized. Under the optimized extraction conditions, red dye was selectively quantified in the presence of other competing dyes at a concentration of 20 microg L(-1) from different water systems with satisfactory recoveries (91-95%) and RSD values (approximately 5.0%).
制备了选择性聚合物萃取剂，用于预富集汽巴克隆活性红染料，该染料常与汽巴克隆活性蓝和汽巴克隆活性黄一起用于织物染色。最佳萃取剂是在氯仿中使用甲基丙烯酸（作为单体）、乙二醇二甲基丙烯酸酯（作为交联剂）、偶氮二异丁腈（作为聚合引发剂）和红色染料作为模板分子制备的，其摩尔化学计量比分别为8.0:40.0:2.5:0.63。分子印迹聚合物（MIP）的结构坚固，在高达260℃的温度下仍能抵抗溶解。与非印迹聚合物相比，印迹产物具有较大的比表面积，提高了其吸附能力。从在pH 4下对红色染料（印迹分子）的吸附容量可以明显看出印迹效果，印迹后吸附容量从24.0增加到79.3 mg g(-1)。平衡吸附研究表明，即使在存在与红色染料化学性质相似的蓝色和黄色染料的情况下，染料印迹聚合物也能有效萃取红色染料。相对于黄色和蓝色染料，选择性系数S（红色染料/染料）分别为13.9和17.1。发现MIP对红色染料预富集有效，预富集因子为100，可用于自来水和处理后的纺织废水。研究并优化了影响MIP萃取红色染料的因素。在优化的萃取条件下，在其他竞争染料存在的情况下，能够从不同水体系中选择性定量浓度为20 μg L(-1)的红色染料，回收率令人满意（91-95%），相对标准偏差值（约5.0%）。
