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本文比较了3种油桃在着色期和商熟期C6醛、醇类物质的变化。以“春光”、“艳光”、“千年红”3种早熟油桃果实为试材,采用顶空固相微萃取(HS-SPME)和气相色谱质谱联用仪(GC/MS),测定了油桃果实中C6醛、醇类化合物。研究结果表明:早熟油桃果中主要C6化合物为己醛、反-2-己烯醛、己醇、反-2-己烯醇、顺-3-己烯醇。在不同成熟阶段,油桃果实各C6醛醇类挥发性物质含量明显不同,反-2-己烯醛含量最高,着色和商熟期平均含量为331.0μg/L和231.6μg/L,顺-3-己烯醇含量最低,着色和商熟期只有11.1μg/L和5.5μg/L,商熟期C6醛醇类含量降低明显。不同品种、不同果实发育期C6醇醛化合物含量不同,“千年红”油桃果实具有较多反-2-己烯醛、己醛和己醇,明显高于“艳光”、“春光”。C6醛类物质在两个时期均具有较高的香气值,对早熟油桃香气贡献大;而C6醇类物质香气值低,对早熟油桃香气贡献小。
This article compares the changes of C6 aldehydes and alcohols in the three nectarines during the pigmentation period and commercial ripening period. Three early-maturing nectarine fruits, such as Spring, Blossom and Millennium, were used as experimental material and analyzed by headspace solid-phase microextraction (HS-SPME) and gas chromatography-mass spectrometry GC / MS) were used to determine C6 aldehydes and alcohols in nectarine fruit. The results showed that the main C6 compounds in early ripe nectarine were hexanal, trans-2-hexenal, hexanol, trans-2-hexenol and cis-3-hexenol. At different stages of maturity, the content of volatile components of C6 aldols in nectarine fruit was significantly different, the content of trans-2-hexenal was the highest, and the average contents in the coloring and commercial ripening period were 331.0μg / L and 231.6μg / L, The content of 3-hexenol was the lowest, with only 11.1μg / L and 5.5μg / L for coloring and commercial ripening stage, while the content of C6 alditol in commercial phase decreased significantly. The contents of C6 aldol in different cultivars and different fruit development stages were different, and the “Nianhonghong” nectarine fruit had more trans-2-hexenal, hexanal and hexanol, which were obviously higher than that of “Spring”. The C6 aldehydes had higher aroma value in both periods and had a greater contribution to the early maturity aroma of nectarine. However, the C6 aromatics had a low aroma value and contributed little to the early nectarine aroma.