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为了解豆渣中小分子物质的赋存形态,本研究用石油醚作溶剂在索式萃取器中对豆渣进行了萃取,并采用傅里叶转换红外光谱仪(FT-IR)和气相色谱/质谱联用仪(GC/MS)对所得石油醚萃取物进行分析,同时用FT-IR对原料豆渣和萃余残渣也进行了分析。结果表明:实验连续萃取5 h,所得石油醚萃取物为淡黄色油状物,萃取率为10.7%;原料和萃余残渣的红外谱图峰形相近,但各吸收峰的吸收强度有所不同,而石油醚萃取物与原料和萃余残渣的红外谱图有明显的差别;石油醚萃取物中共检测到35种GC/MS可识别小分子有机化合物,主要分为烷烃、烯烃、芳香烃、醛、酸、酯及其它类物质7种类别;其中,酯类化合物相对含量为最多,高达61.79%。该研究在开发豆渣的高附加值利用方面具有重要的基础理论意义。
In order to understand the occurrence of small molecular species in okara, soybean oil was extracted with petroleum ether as the solvent in the Sorbite extractor, and analyzed by Fourier transform infrared spectroscopy (FT-IR) and gas chromatography / mass spectrometry The crude petroleum ether extract was analyzed by GC / MS. The raw material soybean residue and raffinate residue were also analyzed by FT-IR. The results showed that the petroleum ether extract was light yellow oil after 5 h continuous extraction, the extraction rate was 10.7%. The infrared spectra of raw materials and raffinate residue were similar, but the absorption intensity of each absorption peak was different, The petroleum ether extract and raw materials and raffinate residue infrared spectra were significantly different; petroleum ether extract detected a total of 35 GC / MS identifiable small molecule organic compounds, mainly divided into alkanes, alkenes, aromatic hydrocarbons, aldehydes , Acids, esters and other substances in seven categories; of which, the relative content of esters is the most, up to 61.79%. This study has important basic theoretical significance in the development of high value-added utilization of bean dregs.