樱桃在物流过程中的品质研究

发布时间：2018-03-26 20:08

本文选题：砂蜜豆樱桃　切入点：冷链物流　出处：《天津商业大学》2016年硕士论文

【摘要】：本试验选取砂蜜豆樱桃为研究对象,在物流过程中,采用近红外光谱技术构建樱桃品质无损检测预测模型,选用电子鼻和顶空固相微萃取结合气相色谱质谱联用仪对其香气品质进行检测,利用质构仪结合数据分析软件SPSS对砂蜜豆樱桃的质地品质进行全面分析。试验的结果如下:(1)运输环节对照组的好果率、明亮指数、色品指数、硬度、总酸、V_C含量均处于较佳水平,优于其它4组处理。低温条件下振荡40 min的处理组具有较高水平的可溶性固形物含量和糖酸比;电子鼻的LDA,PCA分析结果的累积贡献率分别是94.69%,99.31%。因而,电子鼻可以对运输环节的樱桃品质进行很好的区分。(2)贮藏环节砂蜜豆樱桃分别在CS-5d,CW-1 d,DW-20 d呈现出了最佳的感官品质;近红外定性检测,校正模型交互验证相关性系数、校正误差系数分别是0.9344、0.2007;近红外光谱关于总酸、可溶性固形物、糖酸比含量的定量检测,校正模型的相关系数、相对误差分别是0.8617、0.0375,0.9451、0.4329,0.9287、0.5761。预测模型相关性系数、预测误差系数、相对分析误差分别是0.8586、0.0401、3.7,0.9247、0.4425、3.9,0.9108、0.7536、2.7;近红外关于黄酮、V_C含量的定量检测,预测模型相关性系数、相对误差、相对分析误差分别是0.9301、0.4308、3.5,0.8493、0.2253、3.3;电子鼻LA分析结果,W1W、W2S、W1S这3条传感器对砂蜜豆樱桃香气检测最为敏感。CS、CW、DW组LDA总贡献率分别是97.43%、97.24%、98.23%;气相色谱质谱联技术检测结果表明,挥发性物质主要是醇类、醛类、酯类,这一结论与电子鼻LA分析结果一致。砂蜜豆樱桃中挥发性物质含量较高的是反式-2-己烯醇,苯甲醇,己醛,顺式-3-己烯醛,苯甲醛,2-甲基己酸;CS、CW、DW组砂蜜豆樱桃品质新鲜度拐点分别是5 d,4 d,20 d。因此,近红外光谱技术、电子鼻、气相色谱质谱对贮藏环节的砂蜜豆樱桃的品质进行检测监控是准确、高效、可行的。(3)货架环节理化检测结果表明,较低温度可使砂蜜豆樱桃维持较好的感官水平,波动和偏高的温度均不利于其货架期品质,CS组货架3 d时,得到最佳感官品质;电子鼻LDA分析结果,CS、CW、BW组累计贡献率分别是92.37%、93.96%、91.44%,PCA累计贡献率分别是98.21%、99.18%、98.85%;气相色谱质谱检测时发现,3组处理的挥发性成分含量变化趋势和种类不尽相同,CS组品质劣变较缓于另外2组;质构仪的检测结果表明,硬度、弹性、凝聚性、咀嚼性、回复性和粘着性均随着货架期的延长而发生相应的变化。从而,电子鼻、气相色谱质谱、质构仪对货架环节砂蜜豆品质的检测是科学、可行的。(4)冷链物流在线快速评价体系的建立采用理化指标、近红外光谱技术、电子鼻、气相色谱质谱、质构仪对冷链物流过程中砂蜜豆樱桃品质进行检测。试验结果表明,不同检测手段所得结论之间可以相互印证,建立的体系可达到由内部质地结构、营养品质、风味口感再到外部表观色泽、机械损伤等情况的全面检测评价。
[Abstract]:In this experiment, cherry with honey bean was selected as the research object. In the process of logistics, the Near-Infrared Spectroscopy was used to construct the prediction model of non-destructive testing of cherry quality. The aroma quality was determined by electronic nose, headspace solid phase microextraction and gas chromatography-mass spectrometry. The texture and quality of sand-honey bean cherry were analyzed by texture analyzer and data analysis software SPSS. The results of the experiment were as follows: 1) good fruit rate, bright index, color index, hardness of the control group. The content of total acid VC was better than that of the other four groups. The treatment group with 40 min oscillation at low temperature had higher soluble solids content and sugar / acid ratio, and the cumulative contribution rate of LDA-PCA analysis results of electronic nose was 94.69 and 99.31, respectively. The electronic nose can distinguish the cherry quality in transportation link very well. (2) the sand-honey bean cherry in storage link showed the best sensory quality at CS-5dU CW-1 DW-20 d, the correlation coefficient of NIR qualitative detection and calibration model was verified interactively. The calibration error coefficients were 0.9344U 0.2007.NIR spectra were used for quantitative determination of total acids, soluble solids and sucrose acid ratios, and the relative errors of calibration models were 0.8617 0. 0375N 0. 43451U 0. 43287n 0.5761.The correlation coefficients of prediction models and prediction error coefficients were 0. 8617, 0. 937 5 ~ 0. 945 1 ~ 0. 43287 and 0. 5761, respectively. The relative analysis error was 0.8586U 0.0401C 3.7U 0.9247U 0.44253.90.1080.5362.7.The near infrared quantitative detection of the content of flavonoids in Vaphe was used to predict the correlation coefficient and relative error of the model. The relative analysis error was 0.9301 / 0.4308C / 3.5N 0.8493N 0.2253C / 3.3.The results of LA analysis of electronic nose showed that the three sensors were most sensitive to the aroma detection of sweet bean cherry. The total LDA contribution rate of CSC CWN DW group was 97.4397.97.240.The results of gas chromatography-mass spectrometry showed that the volatile substances were mainly alcohols. Aldehydes, esters, which are consistent with the results of electronic nose LA analysis. The contents of volatile substances in sweet bean cherry are higher in trans--2-hexenol, benzyl alcohol, hexaldehyde, cis-3-hexenal, cis-3-hexenal, cis-3-hexenal, cis-3-hexenal, cis-3-hexenal. The inflexion point of quality of sand-honey bean cherry was 5 days, 4 days and 20 days, respectively. Therefore, it is accurate and efficient to detect and monitor the quality of sand honey bean cherry by near infrared spectroscopy, electronic nose and gas chromatography-mass spectrometry. The results of physical and chemical tests on shelf links showed that lower temperature could maintain a good sensory level, and the fluctuation and high temperature were not conducive to the shelf life quality of CS group for 3 days, and the best sensory quality was obtained. The results of LDA analysis of electronic nose showed that the cumulative contribution rate of CWH BW group was 92.3737 / 93.96 / 91.440.The cumulative contribution rate was 98.21 / 99.18/ 98.85, respectively, and it was found that the variation trend of volatile component content and the quality deterioration of CS group were lower than those of the other two groups by gas chromatography-mass spectrometry (GC-MS). The hardness, elasticity, agglomeration, mastication, recoverability and adhesiveness all changed with the extension of shelf life, thus, the electronic nose, gas chromatography-mass spectrometry (GC-MS), electronic nose, gas chromatography-mass spectrometry (GC-MS), electronic nose, gas chromatography-mass spectrometry (GC-MS). It is scientific and feasible to establish a quick on-line evaluation system of cold chain logistics by means of physical and chemical indexes, near infrared spectroscopy, electronic nose, gas chromatography-mass spectrometry, etc. The quality of sand-honey bean cherries in the process of cold chain logistics was tested by texture analyzer. The results showed that the results obtained by different testing methods could be verified mutually, and the established system could be achieved by internal texture structure and nutritional quality. Flavor and taste to the external appearance of color, mechanical damage and other comprehensive evaluation of the situation.
【学位授予单位】：天津商业大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TS255.7

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