Results (
Thai) 1:
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Fatty acid components of WFG esters were detected by
GC–MS (Figs. 2–4). GC–MS analysis showed that major
fatty acid components in all esters were myristic acid (C14:0),
palmitic acid (C16:0), palmitoleic acid (C16:1), stearic acid
(C18:0), oleic acid (C18:1), linoleic acid (C18:2), linolenic
acid (C18:3), arachidic acid (C20:0), eicosenoic (C20:1), and
behenic acid (C22:0) with major contribution by oleic acid in
all the esters. Fig. 4 shows that when WFG was transesterified
with mixture of methanol/ethanol (3:3) {WMEE (3:3)} along
with methyl, ethyl esters were also formed. Similar observation
was also made with other mixtures of methanol and
ethanol. The fatty acid composition of all the esters is presented
in Table 4. All the esters showed oleic acid (∼51.1%)
as a dominant fatty acid. In the case of WMEE (3:3), ethyl
esters formed during transesterification were approximately
45% those of methyl esters i.e., the formation of ethyl esters
was less compared to methyl. This can be explained by the
fact that the reactivity of methoxide radicals is higher than that
of ethoxide radicals [9]. In the case of esters formed by
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