Aristolochic acids (AAs) are a mixture of structural-related compounds, in which aristolochic acid I (AA I) and aristolochic acid II (AA II) are reported to be correlated with Aristolochic acid nephropathy (AAN). In this work, a rapid and sensitive ultra-high-pressure liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS) method was developed to determine AA I and AA II in herbal products...

Radix scutellariae is a well-known traditional Chinese medicine used for the treatments of inflammation, pyrexia, hepatitis, etc. Flavonoids are its main active compounds. The aim of this study is to develop and validate the ultra high-performance liquid chromatography (UHPLC) method for simultaneous determination of 10 flavonoids (baicalin, wogonoside, baicalein, wogonin, oroxylin A, chrysin, ...

Kuraridin is an active natural prenylated flavonoid ingredient originating from the well-known traditional Chinese medicine Sophora flavescens Ait., that possesses various bioactivities, such as antitumor activity, PLCγ1 inhibitory activity, glycosidase inhibitory activity, etc. However, there is no report on the plasma metabolic profile and pharmacokinetic study of kuraridin. The current study...

Chromatography coupling to mass spectrometry becomes a vital instrumentation tool for the separation and determination of small molecules qualitatively and quantitatively. In this study, the author is focused on the mitragynine and 7hydroxymitragynine. Mitragynine and its major metabolite, 7-hydroxymitragynine (also known as “kratom”), are drugs which extracted from a tree planted in Thailand, ...

Overview Purpose: Methods that offer both rapid and sensitive measurement of amino acids are essential to neurochemical research. The ability to decrease analysis time enables an improvement in temporal resolution when studying amino acid neurotransmission. Methods: Two methods using pre-column derivatization were developed: first, a fast isocratic method with electrochemical detection for the ...

Honey adulteration with sugar syrups is a widespread problem. Several types of syrups have been used in honey adulteration, and there is no available method that can simultaneously detect all of these adulterants. In this study, we generated a small-scale database containing the specific chromatographic and mass spectrometry information on sugar syrup markers and developed a simple, rapid, and ...

OBJECTIVES The identification of cutaneous T cell lymphoma (CTCL) biomarkers may serve as a predictor of disease progression and treatment response. The aim of this study was to map potential biomarkers in CTCL plasma. DESIGN AND METHODS Plasma metabolic perturbations between CTCL cases and healthy individuals were investigated using metabolomics and ultrahigh performance liquid chromatograph...

A stability-indicating ultra-high-performance liquid chromatography (UHPLC) method with a diode array detector was developed and validated for the determination of cis/trans isomers of perindopril l-arginine in bulk substance and pharmaceutical dosage form. The separation was achieved on a Poroshell 120 Hilic (4.6 × 150 mm, 2.7 µm) column using a mobile phase composed of acetonitrile-0.1 % form...

The filamentous fungus Stachybotrys chartarum is known for its toxic metabolites and has been associated with serious health problems, including mycotoxicosis, among occupants of contaminated buildings. Here, we present results from a case study, where an ultra-high performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS) method was developed for known and tentatively identified...