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Citation: QIU Bailing, WU Di, GUO Shuang, ZHU Chenqi, GAOYANG Yaya, LIANG Qihui, GAO Ye, SONG Yu, HAN Nanyin. Optimization of experimental conditions for the separation of polystyrene particles by gravitational field-flow fractionation[J]. Chinese Journal of Chromatography, ;2017, 35(2): 216-221. doi: 10.3724/SP.J.1123.2016.07020 shu

Optimization of experimental conditions for the separation of polystyrene particles by gravitational field-flow fractionation

School of Pharmaceutical Science, Peking University, Beijing 100191, China

Received Date: 16 July 2016

Gravitational flow-field fractionation (GrFFF) is the simplest and cheapest field-flow fractionation technique. GrFFF utilizes earth's gravity as external field, providing a size-based separation. It can be applied to the separation and characterization of various micrometer-sized particles and biological samples. A GrFFF device was assembled, and three kinds of polystyrene (PS) particles with different sizes (20, 6 and 3 μm) were used as the model particles. A homemade mixed surfactant was used and was compared with the surfactant FL-70. The separation conditions of GrFFF were optimized with uniform design, including flow rate, mass percentage of polyethylene glycol octylphenol ether (Triton X-100) in mixed surfactant, viscosity of carrier liquid and stop-flow time. The resolution (R_s) and retention ratio (R) were utilized as the evaluation indexes. The results suggest that the separation performance of FL-70 was slightly better than that of the mixed surfactant. Using FL-70 as the surfactant, particles of 20, 6 and 3 μm were completely separated (with resolutions of 1.771 and 2.074). The results indicate that this system has good separation performance.
- gravitational field-flow fractionation(GrFFF),
- uniform design,
- polystyrene (PS) particles,
- carrier liquid,
- surfactant,
- flow rate,
- resolution
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