Abstract:
Isada Krill (Euphausia pacifica) is composed of a lot of PUFAs such as EPA and DHA. In this study, the components of extracted Isada Krill were investigated by head space solid phase microextraction gas chromatography mass spectrometry (HS-SPME-GC-MS). The SPME temperature was studied at 50, 60, 70 and 80 ºC with adsorption time 15, 30, 45, 60 and 75 min. Pyrazine derivatives. 2,3,5-Trimethylpyrazine, 2,6-dimethylpyrazjne and 2-methylpyrazine were identified. The optimum parameters to analyze the component was 80 ºC extraction temperature and 60 min adsorption time. However, the aroma in Isada Krill has to be protected against oxidation due to their mostly reactivity with oxygen. The encapsulation process is required to protect the Isada Krill flavor. Therefore, another objective of this study is to determine the volatile components in Isada Krill before and after the encapsulation process. The spray drying process was used as the encapsulation methods. The effect of inlet air temperatures on the losses of pyrazine were studied at 140, 160, 180 and 200ºC. Furthermore, the type of wall materials as maltodextrin (DE19 and 25) and α- cyclodextrin were also studied. In this study, the suitable conditions for encapsulating Isada Krill flavor were 140 ºC and α - cyclodextrin for air inlet temperature and wall materials, respectively. In addition α -cyclodextrin is multifunctional food ingredients. It can protect active ingredients against mailard reaction and preserve krill flavor. The color of α cyclodextrin krill powder is the lightness among 3 wall material. Maltodextrin (DE25) is hygroscopic wall material which is the high moisture content so shelf life of Maltodextrin (DE25) is limited. Maltodextrin (DE19) is good film forming and protect active ingredients from oxidation reaction.