Monitoring of lipid degradation products by solid-phase microextraction*

2001 ◽  
Vol 13 (6) ◽  
pp. 215-220 ◽  
Author(s):  
Fruzsina Doleschall ◽  
Zsolt Kemény ◽  
Katalin Recseg ◽  
Katalin Kővári
Keyword(s):  
Solid Phase Microextraction ◽  
Solid Phase ◽  
Degradation Products ◽  
Lipid Degradation

Effect of Fe2+ on Ascorbic Acid - Methionine Pattern is Formed by the Reaction of Aroma Compounds

2013 ◽  
Vol 781-784 ◽  
pp. 591-595
Author(s):  
Di Liu ◽  
Yu Shao ◽  
Xiao Hong Yang
Keyword(s):  
Solid Phase Microextraction ◽  
Solid Phase ◽  
Degradation Products ◽  
Model Reaction ◽  
Flavor Compounds ◽  
Gas Chromatography Mass Spectrometry ◽  
Reaction Products ◽  
Competitive Reaction ◽  
Sulfur Containing ◽  
Sulfur Containing Compounds

By solid phase microextraction - Gas Chromatography - mass spectrometry (SPME-GC-MS) technique against acid and methionine bad blood (ASA-Met) model of the reaction products were identified, studied the effect of Fe2+ on the formation of flavor compounds in the model reaction. 27 flavour compounds of furan, pyrazine, thiophene, sulfur and other compounds, were identified, of which, sulfur-containing compounds such as aliphatic cyclic sulfides, sulfide, pyrazine is the main flavor components. Fe2+ was added to the model in the system, on one hand the about adding some sulfur compounds yield, pyrazine compounds significantly increase; on the other hand, Thiophenes significantly reduced compounds or even disappear. This shows that in the model reaction, Fe2+ promotes the thermal degradation of Met, at the same time, suggesting that Fe2+ as oxidant to promote NH3, NH3 and H2S to generate competitive reaction and ASA degradation products formed compounds containing nitrogen, resulting in reduced Thiophenes compounds yield.

Study of chemical stability of lemon oil components in sodium caseinate–lactose glycoconjugate-stabilized oil-in-water emulsions using solid-phase microextraction-gas chromatography

2014 ◽  
Vol 5 (7) ◽  
pp. 1495-1505 ◽  
Author(s):  
Hassan Sabik ◽  
Allaoua Achouri ◽  
Maria Alfaro ◽  
Marylène Pelletier ◽  
Denis Belanger ◽  
...  
Keyword(s):  
Gas Chromatography ◽  
Chemical Stability ◽  
Solid Phase Microextraction ◽  
Solid Phase ◽  
Degradation Products ◽  
Sodium Caseinate ◽  
Oil In Water ◽  
Lemon Oil ◽  
Oil Components

A method was developed to quantify lemon oil components and their degradation products in oil-in-water emulsions.

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