The comparative study of adsorption properties of several adsorbents with focus on selective isolation of water-soluble B vitamins (B₂, B, B₆ and B₁₂) from food products and some pharmaceutical formulations by solid-phase extraction is performed. The adsorption of vitamins was investigated for eleven adsorbents including bare silica, silica modified with polyvinylpyrrolidone, octadecyl-, aminopropyl-, cyanobutyl-functional groups, poly(styrene–divinylbenzene) modified with lactam groups, hypercrosslinked polystyrene, activated carbon and porous microdispersed sintered detonation nanodiamond. Dynamic adsorption capacities of adsorbents for each of the tested vitamins were determined from the dynamic output curves. The highest adsorption capacity was found for HCPS-based sorbents, but complete desorption from these sorbents required harsh conditions. On this reason MSDN was suited better for the preconcentration of water soluble vitamins.

中文翻译：

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不同极性吸附剂吸附水溶性维生素的比较研究

几种吸附剂吸附性能的比较研究，以选择性分离水溶性B族维生素（B ₂，B，B ₆和B ₁₂从食品和某些药物制剂中进行固相萃取。研究了11种吸附剂对维生素的吸附，包括裸露的二氧化硅，聚乙烯吡咯烷酮改性的二氧化硅，十八烷基，氨基丙基，氰基丁基官能团，内酰胺基改性的聚苯乙烯-二乙烯基苯，超交联的聚苯乙烯，活性炭和多孔微分散烧结爆轰纳米金刚石。从动态输出曲线确定每种测试维生素对吸附剂的动态吸附能力。对于基于HCPS的吸附剂，发现了最高的吸附能力，但是要从这些吸附剂中完全脱附需要苛刻的条件。因此，MSDN更适合于水溶性维生素的预浓缩。