Bovine Colostrum: Determination of Naturally Occurring Steroid Hormones by Liquid Chromatography−Tandem Mass Spectrometry (LC−MS/MS)

2011 ◽  
Vol 59 (4) ◽  
pp. 1423-1427 ◽  
Author(s):  
Carolin Farke ◽  
Ernst Rattenberger ◽  
Sabine U. Roiger ◽  
Heinrich H. D. Meyer
Keyword(s):  
Mass Spectrometry ◽  
Liquid Chromatography ◽  
Tandem Mass Spectrometry ◽  
Steroid Hormones ◽  
Bovine Colostrum ◽  
Tandem Mass ◽  
Naturally Occurring ◽  
Chromatography Tandem Mass Spectrometry ◽  
Liquid Chromatography Tandem Mass

Determination of steroid hormones in sediments based on quick, easy, cheap, effective, rugged, and safe (modified-QuEChERS) extraction followed by liquid chromatography-tandem mass spectrometry (LC-MS/MS)

2015 ◽  
Vol 7 (22) ◽  
pp. 9577-9586 ◽  
Author(s):  
Julien Camilleri ◽  
Emmanuelle Vulliet
Keyword(s):  
Mass Spectrometry ◽  
Liquid Chromatography ◽  
Tandem Mass Spectrometry ◽  
Steroid Hormones ◽  
Tandem Mass ◽  
Modified Quechers ◽  
Chromatography Tandem Mass Spectrometry ◽  
Target Analytes ◽  
Liquid Chromatography Tandem Mass

The method enables the determination of the target analytes with limits of detection comprised between 0.03 and 0.2 ng g¬1and limits of quantification comprised between 0.1 and 0.6 ng g¬1.

scholarly journals Determination of Abamectin, Doramectin, Emamectin, Eprinomectin, Ivermectin, and Moxidectin in Milk by Liquid Chromatography Electrospray Tandem Mass Specrometry

2006 ◽  
Vol 89 (4) ◽  
pp. 1088-1094 ◽  
Author(s):  
Robert Sheridan ◽  
Lucille Desjardins
Keyword(s):  
Mass Spectrometry ◽  
Liquid Chromatography ◽  
Tandem Mass Spectrometry ◽  
Tandem Mass ◽  
Solvent Exchange ◽  
Naturally Occurring ◽  
Chromatography Tandem Mass Spectrometry ◽  
Whole Milk ◽  
Liquid Chromatography Tandem Mass

Abstract The avermectin and milbemycin families of compounds are derived from naturally occurring yeasts. They have proven to be potent preventatives against a variety of pests such as insects and parasites. Only eprinomectin and moxidectin are currently approved for use on lactating cattle with tolerances in milk of 12 μg/kg for eprinomectin and 40 μg/kg for moxidectin. Detection of misuse or inadvertent contamination in milk requires a sensitive and definitive analytical method. A method has been developed for the determination of 5 avermectins and 1 milbemycin in milk using a simple liquidliquid extraction and liquid chromatography/tandem mass spectrometry (LC/MS/MS) analysis. Ivermectin (IVR), doramectin (DOR), abamectin (ABA), eprinomectin (EPR), emamectin (EMA), and moxidectin (MOX) were extracted from whole milk by partitioning into acetonitrile with a subsequent solvent exchange into methanolwater. Simultaneous confirmation and quantification were achieved with LC separation, positive electrospray ionization (ESI+), and MS/MS. The limits of detection ranged from 16 pg/g (ppt) for EMA to 1.7 μg/g (ppb) for MOX.

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