Abstract
Measurements of light from flowing solutions containing coexisting populations of colloids and polymers are presented. By appropriate recognition of peaks produced by individual colloid particles and recovery of the baseline due to the polymer population, the colloid particle number density can be monitored in real time while the polymer population is characterized absolutely according to weight-average molecular weight Mw, and z-average mean square radius of gyration 〈S2〉z. Either or both populations may also be evolving in time, so that the technique is termed heterogeneous time dependent static light scattering (HTDSLS). The essential notions of the technique are presented, and then the feasibility of the simultaneous measurements is first demonstrated by an equilibrium characterization of poly(vinylpyrrolidone) (PVP) contaminated by known concentrations of 2 Im latex spheres. The time dependent capabilities are then demonstrated by monitoring the growth of Escherichia coli bacteria in a solution containing PVP. It is expected that HTDSLS will find many applications, such as in biotechnology reactors, biomedical assays, and polymer reactors where gels or crystallites are produced in addition to polymer chains.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
