Résumé
Objective]To establish a rapid resolution liquid chromatography-mass spectrometry(RRLC-MS) method for sibutramine hydrochloride, ephedrine hydrochloride and furosemide, which is the illegally added substances in diet pills. [Method]The chromatographic conditions: Agilent SB-C18 column(2.1mm×50mm, 5μm). The mobile phase consists of acetonitrile(containing 0.1% formic acid) and 0.1% formic acid solution, gradient elution with flow rate of 0.2mL·min-1; The MS conditions: electrospray ionization(ESI) source, with positive and negative ions, multiple reaction monitoring(MRM) mode to detect contents of prohibited substances in diet pills. [Result]Under the above conditions, all seven diet pills were detected with the sibutramine hydrochloride and ephedrine hydrochloride. The concentration range of the two substances was from 0.39 to 4.29μg·g-1 and from 1.63 to 8984.18μg·g-1 respectively. One drug contained furosemide, while the content was 8.71μg·g-1. [Conclusion]The method established was fast, convenient, had high sensitivity and high accuracy, which can detect prohibited substances quantitatively and qualitatively in diet pills.
Résumé
Candida guilliermondii is found in sea water, animal feces, buttermilk, and beer and has been isolated from human infections, mostly of cutaneous origin. It usually causes skin and soft tissue infections and has decreased susceptibility to fluconazole. Systemic infections occur mostly in immunocompromised patients. A 38-year-old female was admitted with a 4-day fever. Her medical and family histories were unremarkable, except for obesity. She had been taking diet pills for 3 months and had undergone injection therapy into her abdomen for lipolysis for 1 month. She did not respond to empirical antibiotics. A Candida species was isolated from blood cultures and identified as C. guilliermondii based on partial LSU rRNA gene sequence analyses. She was treated with amphotericin B, and recovered completely.