Analysis of curcuminoids and volatile components in 160 batches of turmeric samples in China by high-performance liquid chromatography and gas chromatography mass spectrometry.

Turmeric (Curcuma longa L.) is a popular herbal medicine worldwide. Curcuminoids and volatile constituents are its major bioactive components.

Rapid quantitation and identification of the chemical constituents in Danhong Injection by liquid chromatography coupled with orbitrap mass spectrometry.

Danhong Injection (DHI) is a Chinese medicine patent drug to treat cardiovascular diseases. It is derived from the herbal medicines Dan-shen and Hong-hua. The bioactive compounds of DHI are polar phenolic acids and flavonoid glycosides.

Simultaneous Determination and Risk Assessment of Pyrrolizidine Alkaloids in Thunb. by UPLC-MS/MS Together with Chemometrics.

Pyrrolizidine alkaloids (PAs) are natural toxins found in some genera of the family Asteraceae. However, it has not been reported whether PAs are present in the widely used Asteraceae plant Thunb. ().

Simultaneous determination of chloramphenicol and aflatoxin M1 residues in milk by triple quadrupole liquid chromatography-tandem mass spectrometry.

A reliable, rapid, and sensitive liquid chromatography-tandem mass spectrometry (LC-MS/MS) method for simultaneous determination of chloramphenicol and aflatoxin M(1) in milk has been developed. This method includes simple extraction of sample with acetonitrile, separation on a MGIII-C(18) column using 5 mM ammonium acetate aqueous solution/methanol (60:40, v/v) as mobile phase, and MS/MS detection using multiple reaction monitoring mode. The method was validated according to Commission Decision 2002/657/EC.

[Studies on the chemical constituents from Inula cappa (II)].

Objective: To study the chemical constituents of the root of Inula cappa.

Method: The compounds were isolated and purified by recrystallization and chromatography with silica gel column and Sephadex LH-20 column. Their structures were identified by physico-chemical properties and spectral analysis.

[Studies on chemical constituents in fruit of Rubus chingii].

Objective: To study the chemical constituents of the fruit of Rubus chingii.

Method: The compounds were isolated and purified by recrystallization and chromatography with silica gel column and Sephadex LH-20 column. Their structures were identified by physicochemical properties and spectral analysis.