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目的:鉴定长街缢蛏原种并分析其特征性的挥发性物质。方法:通过使用电子鼻建立长街缢蛏的风味指纹模型,并对其准确性进行验证。通过顶空固相微萃取-气-质联用仪(HS-SPME-GC-MS)联合使用来检测新鲜、100℃和150℃条件下长街缢蛏的主要挥发性物质。结果:电子鼻建立的气味指纹模型能够准确判断样品是否属于长街缢蛏原种。电子鼻结果在新鲜、100℃和150℃条件下,长街缢蛏挥发性物质差异明显。利用SPMEGC-MS进一步分析3个温度下长街缢蛏的主要挥发性物质,其所含挥发性物质种类数分别为40,46,33,其中以烃类、醛类、醇类、酮类和呋喃类物质为主。结论:由电子鼻建立的指纹模型能准确鉴定长街缢蛏的原种,气-质联用仪能够确定长街缢蛏原种指纹性挥发性物质。
OBJECTIVE: To identify the original species of Channa macrocarpa in Changjie and analyze its characteristic volatile substances. Methods: By using the electronic nose, a flavor fingerprint model was built and its accuracy was verified. The main volatile compounds in fresh, 100 ℃ and 150 ℃ long-shaddock shad were detected by headspace solid-phase microextraction-gas chromatography-mass spectrometry (HS-SPME-GC-MS) Results: The odor fingerprint model established by the electronic nose can accurately determine whether the sample belongs to the original species of Changjie emus. Electronic nose results in the fresh, 100 ℃ and 150 ℃ conditions, the volatile substances of Chang Street 缢 差 significant differences. The main volatile compounds in Changji Street were analyzed by SPMEGC-MS. The number of volatile compounds in the samples was 40, 46 and 33 respectively. Among them, hydrocarbons, aldehydes, alcohols, ketones and furan Material-based. Conclusion: The fingerprinting model established by the electronic nose can accurately identify the original species of Changji, and gas-mass spectrometer can identify the fingerprinting volatile substances of the original species.