Simultaneous determination of α-tocopheryl acetate and tocopherols in aquatic organisms and fish feed

1999 ◽  
Vol 724 (2) ◽  
pp. 249-255 ◽  
Author(s):  
Ji Zeng Huo ◽  
Hans J. Nelis ◽  
Patrick Lavens ◽  
Patrick Sorgeloos ◽  
André P. De Leenheer
Keyword(s):  
Simultaneous Determination ◽  
Aquatic Organisms ◽  
Tocopheryl Acetate ◽  
Fish Feed

scholarly journals Simultaneous Determination of α-Tocopherol and α-Tocopheryl Acetate in Plasma by Mass Fragmentography

1979 ◽  
Vol 99 (10) ◽  
pp. 1037-1041
Author(s):  
MASASHI NAKANISHI ◽  
KAZUKO TSUCHIYA ◽  
KENYA SAKAGUCHI ◽  
TAKESHI FUJITA
Keyword(s):  
Simultaneous Determination ◽  
Alpha Tocopherol ◽  
Tocopheryl Acetate ◽  
Mass Fragmentography

scholarly journals Development, Optimization, and Comparison of Different Sample Pre-Treatments for Simultaneous Determination of Vitamin E and Vitamin K in Vegetables

Molecules ◽  
2020 ◽  
Vol 25 (11) ◽  
pp. 2509
Author(s):  
Antonella Aresta ◽  
Gualtiero Milani ◽  
Maria Lisa Clodoveo ◽  
Carlo Franchini ◽  
Pietro Cotugno ◽  
...  
Keyword(s):  
Vitamin E ◽  
Simultaneous Determination ◽  
Vitamin K ◽  
Solid Phase ◽  
Internal Standard ◽  
Premature Aging ◽  
Tocopheryl Acetate ◽  
Gas Chromatography Mass Spectrometry ◽  
Target Analytes

The absence of vitamin E from the diet can lead to cardiovascular disease, cancer, cataracts, and premature aging. Vitamin K deficiency can lead to bleeding disorders. These fat-soluble vitamins are important nutritional factors that can be determined in different methods in vegetables. In this work, the simultaneous determination of α-tocopherol, α-tocopheryl acetate, phylloquinone, and menaquinone-4 by gas chromatography–mass spectrometry (GC–MS) has been optimized using both direct injection and solid phase microextraction (SPME). Three different sample pre-treatment approaches based on: (A) solid–liquid–liquid–liquid extraction (SLE–LLE), (B) SLE, and (C) SPME were then applied to extract the target analytes from vegetables samples using menaquinone as internal standard. All the procedures allowed the determination of the target analytes in onion, carrot, celery, and curly kale samples. Similar results were obtained with the three different approaches, even if the one based on SPME offers the best performance, together with a reduced use of solvent, time consumption, and experimental complexity, which makes it the preferable option for industrial applications.

A fast, sensitive method for the simultaneous determination of α-tocopherol and α-tocopheryl acetate in mixed micelles

2005 ◽  
Vol 822 (1-2) ◽  
pp. 339-346 ◽  
Author(s):  
Stéphane Castan ◽  
Claude Villard ◽  
Stefan Jakob ◽  
Antoine Puigserver ◽  
El Hassan Ajandouz
Keyword(s):  
Simultaneous Determination ◽  
Mixed Micelles ◽  
Tocopheryl Acetate ◽  
Sensitive Method

A general computer program for the extended plate overlap algorithm

1978 ◽  
Vol 48 ◽  
pp. 287-293 ◽  
Author(s):  
Chr. de Vegt ◽  
E. Ebner ◽  
K. von der Heide
Keyword(s):  
Computer Program ◽  
Simultaneous Determination ◽  
General Computer Program ◽  
General Computer

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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