Qualitative and Quantitative Analyses of Flavonoids in Spirodela polyrrhiza by High‐performance Liquid Chromatography Coupled with Mass Spectrometry

Abstract

Qualitative LC/MS and quantitative HPLC analytical methods were established for the comprehensive quality control of S. polyrrhiza.

Proteomic analysis to investigate the high starch accumulation of duckweed (Landoltia punctata) under nutrient starvation

“…The total flavonoid content and component comparison were determined by HPLC (Thermo spectra system AS3000, USA)-UV (Thermo UV6000 Detector, USA) referring to the method on literature (Qiao et al, 2011).…”

Potential of duckweed in the conversion of wastewater nutrients to valuable biomass: A pilot-scale comparison with water hyacinth

“…The amino acid content was measured according to the national standard method (GB/T 5009. . The flavonoid content was measured according to the method of Qiao et al (2011) and the cellulose and lignin content were measured according to the method of Methacanon et al (2010).…”

“…Table 1 also shows that the flavonoid content of duckweed (2.91%) was significantly higher (nearly 7 times) than that of water hyacinth (0.44%) in the summer. The flavonoids are major functional components of many herbal and insect preparations for medicinal use (Havsteen, 2002;Qiao et al, 2011). The high flavonoid content of duckweed suggested its significant application potential in the field of medicine.…”

RP-HPLC–ESI–QTOF/MS2 based strategy for the comprehensive metabolite profiling of Sclerocarya birrea (marula) bark

“…Both showed the corresponding most prominent fragment ion at m/z 287, which was generated by the breakage of the glycosidic bond and losing the glucose moiety. Secondary fragments were observed for the first eluting isomer at m/z 269, and 259, which were previously described by Qiao et al (2011), using an IT mass analyzer. Finally, two other isomers were characterized as eriodictyol-O-glucosidegallate (65 and 86), based on their molecular formula (and thus mass weight) and MS/MS spectra, since no information related to their MS fragmentation was found in the literature.…”