[Experimental teaching reform of polymer molar mass determination using gel permeation chromatography coupled with light scattering].

Gel permeation chromatography coupled with light scattering (GPC-LS) is among the most common methods for determining the molar masses of polymers. GPC-LS is widely used in polymer science research and has been adopted for many industrial applications owing to its high sensitivity, accuracy, and precision. The determination of polymer molar masses using GPC-LS is an important experimental component of the "Polymer Physics Experiments" course.

The sensitive "Turn-on" fluorescence platform of ascorbic acid based on conjugated polymer nanoparticles.

Ascorbic acid (AA) is very important for maintaining the normal physiological processes of the organism. In order to overcome the shortcomings of existing methods, such as lower sensitivity, complex operations and expensive instruments, it is urgent to develop a simple and rapid method for the determination of AA in the field of food and pharmaceutical preparations. Conjugated polymer nanoparticles (CPNs) have lately aroused wide concerns because of excellent optical properties, biocompatibility and stability.

Highly Sensitive Detection of Melamine Based on the Fluorescence Resonance Energy Transfer between Conjugated Polymer Nanoparticles and Gold Nanoparticles.

Adding melamine as additives in food products will lead to many diseases and even death. However, the present techniques of melamine detection require time-consuming steps, complicated procedures and expensive analytical apparatus. The fluorescent assay method was facile and highly sensitive.