Automated on-line-solid-phase extraction—high-performance liquid chromatography-diode array detection of phenolic compounds in sherry wine

Hippophae rhamnoides L.: chromatographic methods to determine chemical composition, use in traditional medicine and pharmacological effects

“…The use of diode array detection (DAD) (which enables the collection of on-line spectra and simultaneous quantification by several wavelengths) has become especially common [111][112][113][114][115]. Recently, coulometric electrode array detection has been shown to be a promising technique for flavonoid analysis.…”

Study of the antioxidant power of brandies and vinegars derived from Sherry wines and correlation with their content in polyphenols

“…Caftaric, cis-p-coutaric, trans-p-coutaric, and cisp-coumaric acids are not commercialized, so the former was quantified using the caffeic acid calibration curve and the rest using the trans-p-coumaric acid one (Chilla, Guill en, Barroso, & P erez-Bustamante, 1996). The pure compounds were dissolved in a brandy-like model solution, prepared with ethanol (Panreac) (40% v/v) and purified water, or vinegar-like model solution, prepared with acetic acid (60 g/L), ethanol (0.5% v/v) (Panreac) and purified water.…”

Rapid Determination of Simple Polyphenols in Grapes by LC Using a Monolithic Column

“…Reverse phase-liquid chromatography (RP-LC) using conventional RP C18 columns has proved to be the most appropriate technique for determining these compounds sufficiently sensitive and precise. Unfortunately, chromatographic analyses often take excessive time and sometimes must be preceded by a time-consuming sample cleanup step [12].…”