A stability-indicating high-performance thin-layer chromatographic (HPTLC) method has been developed for the determination of terbutaline sulfate (TBS) as a bulk drug and in pharmaceutical formulations (submicronized dry powder inhalers). The separation was achieved on TLC aluminum plates precoated with silica gel 60F-254 using chloroform-methanol (9.0:1.0 v/v) as mobile phase. The densitometri...

In this study, a novel flocculant was prepared by an inorganic polymetric flocculant (IPF) polysilicate ferroaluminum sulfate (PSFA) and rectorite (REC). The structure of the PSFA-REC composite was characterized by Fourier transform infrared (FT-IR) spectroscopy and X-ray diffraction (XRD), in order to determine the optimal temperature. The flocculation test was made at 25 , 45 and 65 , the res...

Near-field scanning optical microscopy (NSOM or SNOM) opens the fascinating opportunity to access the richness of spectroscopic information at a sub-micronic resolution. Shear-force topography coupled to localized spectral information evidence chemical heterogeneity at this challenging spatial scale, which can be crucial to understand the relationship between microscopic features and macroscopi...