Liquid Chromatographic Determination of Phenolic Impurities in Technical MCPA Using Electrochemical Detection (Coulometric Mode)
نویسندگان
چکیده
منابع مشابه
Determination of phenolic compounds in dietary supplements and tea blends containing Echinacea by liquid chromatography with coulometric electrochemical detection.
Analytical methodologies with ultrasonic extraction and liquid chromatography (LC) were developed for the determination of phenolic compounds in dietary supplements containing Echinacea. The phenolic compounds determined by these methods included caftaric acid, chlorogenic acid, cynarin, echinacoside, and cichoric acid. Samples from tablets, capsules, and bags of tea blends were extracted by so...
متن کاملRapid liquid chromatographic determination of itraconazole and its production impurities.
A simple, rapid ultra-performance liquid chromatography (UPLC) method was developed for the analysis of itraconazole and its associated production impurities. The optimum chromatographic conditions were achieved using an Agilent Zorbax Eclipse XDB C18 column, 1.8 µm (4.6 × 50 mm) installed in a column oven heater utilizing a gradient mobile phase of 0.08M tetrabutylammonium hydrogen sulfate buf...
متن کاملHigh Performance Liquid Chromatographic Determination of Phenolic Compounds in Propolis
Purpose: To develop a simple, precise and rapid high-performance liquid chromatographic technique coupled with photodiode array detection (DAD) method for the simultaneous determination of rutin, quercetin, luteolin, genistein, galangin and curcumin in propolis. Methods: Ultrasound-assisted extraction was applied to isolate six antioxidant phenolic compounds from propolis samples. Chromatograph...
متن کاملImproved liquid-chromatographic determination of 3-methoxy-4-hydroxyphenylethyleneglycol in urine with electrochemical detection.
In this improved method for quantifying 3-methoxy-4-hydroxyphenylethyleneglycol (MHPG) in urine, after a multistep extraction of MHPG and internal standard (iso-MHPG) from 3.0 mL of urine, the compounds are separated on a C18 reversed-phase column and quantified by use of an electro-chemical detector. The isocratic chromatographic separation takes about 16 min. The mobile phase is phosphate buf...
متن کاملLiquid-chromatographic method for determination of homovanillic acid in plasma, with electrochemical detection.
We describe a sensitive, simple method for measuring homovanillic acid in human plasma. The method is based on liquid chromatography with electrochemical detection. Sensitivity was 125 pg of homovanillic acid per injection. Samples were deproteinized and extracted with organic solvent before chromatography. Quantification was by the standard-additions technique. Analytical recovery of added HVA...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of AOAC INTERNATIONAL
سال: 1988
ISSN: 0004-5756
DOI: 10.1093/jaoac/71.2.325