Publications by authors named "Lih-Ching Chiueh"
Article Synopsis
- The study introduces a gas chromatography/mass spectrometry (GC-MS) method to detect and measure six synthetic cathinones in urine samples, including mephedrone and methylone.
- It incorporates solid-phase extraction and derivatization, achieving quick analysis within 18 minutes while maintaining strong linearity in results.
- Testing showed that the method is effective for identifying these substances with high precision and accuracy, successfully detecting synthetic cathinones in real urine samples.
There have been rapid increases in consumer products containing nanomaterials, raising concerns over the impact of nanoparticles (NPs) to humankind and the environment, but little information has been published about mineral filters in commercial sunscreens. It is urgent to develop methods to characterize the nanomaterials in products. Titanium dioxide (TiO) and zinc oxide (ZnO) NPs in unmodified commercial sunscreens were characterized by laser scanning confocal microscopy, atomic force microscopy, X-ray diffraction (XRD), and transmission electron microscopy (TEM).
View Article and Find Full Text PDFA high-performance liquid chromatography (HPLC) method was developed for the determination of maleic acid which was released from starch maleate (SM) through the alkaline hydrolysis reaction. The proper alkaline hydrolysis conditions and LC separation are reported in this study. The starch samples were treated with 50% methanol for 30 minutes, and then hydrolyzed by 0.
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