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Citation: QIAN Chen, FANG Hongxia, CAI Qun, CAI Fang, GAO Xinyu, LI Dandan. Determination of the relative molecular mass distribution of the ultrafiltration fractionation product of lignosulfonate by advanced polymer chromatography[J]. Chinese Journal of Chromatography, ;2018, 36(12): 1337-1341. doi: 10.3724/SP.J.1123.2018.08010 shu

Determination of the relative molecular mass distribution of the ultrafiltration fractionation product of lignosulfonate by advanced polymer chromatography

Applied Chemistry Laboratory, Huangshan University, Huangshan 245041, China

Received Date: 13 August 2018

Fund Project: Natural Science Foundation of the Anhui Higher Education Institutions of China (No. KJHS2015B15)

The effects of testing conditions, such as pH and ionic strength of the mobile phase, on the relative molecular mass obtained by advanced polymer chromatography (APC) were investigated systematically. The non-size exclusion effects were discussed for lignosulfonate and its ultrafiltration fractionation product. The relative molecular mass distribution of lignosulfo-nate was well-characterized by an APC system using three columns in series, with a 10 μ L injection volume and 0.1 mol/L NaNO₃ as the aqueous mobile phase, at a flow rate of 0.5 mL/min. The relative molecular mass distribution is in the eight molecular mass ranges. Optimized test conditions were used to characterize the ultrafiltration fractionation product of lignosulfonate. The obtained number average relative molecular masses (M_n) of the three components were 40410, 12208, and 1516 Da, indicating that lignosulfonate was well separated into three fractions by ultrafiltration membrane separation. The APC technique presented herein provides the basis for further application of the fractional separation products of lignosulfonate.
- advanced polymer chromatography,
- water soluble polymer,
- lignosulfonate,
- ultrafiltration fractionation product
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