Analytical-Chemistry/Forensic-Science Group (HIMS), University of Amsterdam, Faculty of Science, Amsterdam, The Netherlands.
J Sep Sci. 2010 Nov;33(22):3604-11. doi: 10.1002/jssc.201000512.
Sulfonated lignins, used as dispersants in agrochemical formulations, have been characterized by hyphenation of ion-pair RPLC and thermally assisted hydrolysis and methylation-GC-MC (THM-GC-MS). The chemical structure of a series of selected lignins was evaluated, both in terms of overall composition and in terms of composition as a function of molecular size. Some sulfonated lignins give rise to unstable formulations. In the compositional analysis, these samples were found to yield additional fragments. A newly developed comprehensive method made it possible to monitor the occurrence of these fragments as a function of molecular size. In addition to differences in the molecular size between "good" and "bad" batches, clear differences in chemical composition were established.
磺化木质素作为农药制剂中的分散剂，已通过离子对反相高效液相色谱和热辅助水解及甲基化-气相色谱-质谱联用（THM-GC-MS）进行了表征。对一系列选定木质素的化学结构进行了评估，不仅评估了其总体组成，还评估了其随分子大小变化的组成。一些磺化木质素会导致制剂不稳定。在组成分析中，发现这些样品会产生额外的片段。新开发的综合方法可以监测这些片段随分子大小的变化情况。除了“好”和“坏”批次之间的分子大小差异外，还确定了在化学成分方面存在明显差异。
