On-Line Coupling of Thermal Field-Flow Fractionation with Low-Angle Laser Light Scattering

Martin, Michel; J.H.Hes,

doi:10.1080/01496398408060669

Cited by 13 publications

(5 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This technique uses a laminar stream of liquid flowing along the separation channel and a perpendicularly directed cross flow to separate the particles according to their size. Since the invention of FFF by Giddings [ 5 ], and later combination with DLS [ 6 ] this technique has been used for environmental, food and medical purposes [ 7 – 9 ].…”

Section: Introductionmentioning

confidence: 99%

Impact of Ionic Strength of Carrier Liquid on Recovery in Flow Field-Flow Fractionation

2018

View full text Add to dashboard Cite

Asymmetrical flow field-flow fractionation (AF4) and hollow-fiber flow field-flow fractionation (HF5) are techniques widely used in analytical, industrial and biological analyses. The main problem in all AF4 and HF5 analyses is sample loss due to analyte–membrane interactions. In this work the impact of liquid carrier composition on latex nanoparticles (NPs) separation in water and two different concentrations of NH4NO3 was studied. In AF4, a constant trend of decreasing the size of 60 and 121.9 nm particles induced by the ionic strength of the carrier liquid has been observed. In contrast, an agglomeration effect of the biggest 356 nm particles was observed when increasing ionic strength, which induced a significant drop of recovery to 35%. H5F provides better resolution and intensified peaks of NPs, but careful optimisation of system parameters is mandatory to obtain good separation.

show abstract

Section: Introductionmentioning

confidence: 99%

Impact of Ionic Strength of Carrier Liquid on Recovery in Flow Field-Flow Fractionation

2018

View full text Add to dashboard Cite

show abstract

“…At the same time M w for the sample can be measured accurately. 17,18 In MALLS-SEC the empirical equation is often used to express the relationship between MW and retention volume along an elution chromatogram. 19 Thus a plot of log M i vs V ei will be a straight line.…”

Section: Theorymentioning

confidence: 99%

“…For polydisperse polymeric samples A and b may be determined with an SEC system equipped with on-line MALLS and concentration sensitive detectors. At the same time M w for the sample can be measured accurately. , …”

Section: Theorymentioning

confidence: 99%

Determination of Thermal Diffusion Coefficients for Polydisperse Polymers and Microgels by ThFFF and SEC−MALLS

Nguyen¹,

Beckett²,

Pille³

1998

Macromolecules

View full text Add to dashboard Cite

A new method combining thermal field-flow fractionation (ThFFF) and SEC−MALLS is proposed for the measurement of the thermal diffusion coefficient D T for polydisperse polymeric samples. This method should greatly increase the range of applicability of ThFFF for characterization of block copolymers and also for studies of thermal diffusion, an interesting phenomenon not yet well understood. ThFFF is one of only a few techniques (e.g., thermal diffusion forced Rayleigh scattering) that can determine D T values of polymers. The values of D T can be used to reflect the surface composition of block copolymer molecules as reported in recent studies. Currently, the value has been measured with ThFFF based on the sample peak maximum method, which can introduce errors when the sample has a broad MW distribution. The method proposed here measures D T by taking all digitized points in the entire sample peak into consideration, and has been tested with polystyrene, poly(tert-butylstyrene), and some copolymer microgels. Preliminary results are presented and discussed.

show abstract

“…Second, a low-angle light-scattering photometer and a differential refractometer has been attached to a TFFF channel. 14 This arrangement permitted the construction of a MW calibration curve and allowed the determination of polymer average MW and the MWD. In spite of some inherent problems, this approach has promise when improved, low-cost light-scattering instruments are available.…”

Section: Introductionmentioning

confidence: 99%

Polymer molecular weight distributions by thermal field flow fractionation using Mark-Houwink constants

Kirkland¹,

Rementer²

1992

Anal. Chem.

View full text Add to dashboard Cite

show abstract

On-Line Coupling of Thermal Field-Flow Fractionation with Low-Angle Laser Light Scattering

Cited by 13 publications

References 19 publications

Impact of Ionic Strength of Carrier Liquid on Recovery in Flow Field-Flow Fractionation

Impact of Ionic Strength of Carrier Liquid on Recovery in Flow Field-Flow Fractionation

Determination of Thermal Diffusion Coefficients for Polydisperse Polymers and Microgels by ThFFF and SEC−MALLS

Polymer molecular weight distributions by thermal field flow fractionation using Mark-Houwink constants

Contact Info

Product

Resources

About