Simultaneous determination of six major ergot alkaloids and their epimers in cereals and foodstuffs by LC–MS–MS

2008 ◽  
Vol 391 (2) ◽  
pp. 563-576 ◽  
Author(s):  
Rudolf Krska ◽  
George Stubbings ◽  
Roy Macarthur ◽  
Colin Crews
Author(s):  
Son Tran Cao ◽  
Giang Tran Hoang ◽  
Men Nguyen Thi ◽  
Ha Binh Nguyen Thi ◽  
Chi Le Dinh ◽  
...  

A simple and accurate LC-MS/MS method has been developed for the simultaneous determination of four ergot alkaloids (EAs) including ergosine, ergocryptine, ergocristine and ergocorsine in food. The studied EAs were extracted and cleaned up using QuEChERS technique then separated using C18 column and quantified by MS/MS detector. The positive ESI source was used in this study together with multi-reactive ion monitoring mode. The method, which has been validated according to AOAC International requirements, showed good specificity, with the linearity varying from 5.0 µg/kg to 100 µg/kg, the LODs and LOQs were 0.3 µg/kg and 1.0 µg/kg; the repeatability and recovery were from 3.7 to 12.5 % and 90.6 - 102.8% respectively. The method has been applied to determine the EAs concentration in 90 corn, wheat and cereal samples, of which no samples were detected with the studied EAs.


2018 ◽  
Vol 410 (22) ◽  
pp. 5567-5581 ◽  
Author(s):  
Natalia Arroyo-Manzanares ◽  
Karl De Ruyck ◽  
Valdet Uka ◽  
Laura Gámiz-Gracia ◽  
Ana M. García-Campaña ◽  
...  

1978 ◽  
Vol 48 ◽  
pp. 287-293 ◽  
Author(s):  
Chr. de Vegt ◽  
E. Ebner ◽  
K. von der Heide

In contrast to the adjustment of single plates a block adjustment is a simultaneous determination of all unknowns associated with many overlapping plates (star positions and plate constants etc. ) by one large adjustment. This plate overlap technique was introduced by Eichhorn and reviewed by Googe et. al. The author now has developed a set of computer programmes which allows the adjustment of any set of contemporaneous overlapping plates. There is in principle no limit for the number of plates, the number of stars, the number of individual plate constants for each plate, and for the overlapping factor.


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