建立一种顶空-气相色谱-质谱法结合保留指数分析食品包装用纸中挥发性气味成分的分析方法。采用顶空直接进样方式,经气相色谱-质谱上机检测,在美国国家标准与技术研究院(National Institute of Standards and Technology,NIST)质谱库检...建立一种顶空-气相色谱-质谱法结合保留指数分析食品包装用纸中挥发性气味成分的分析方法。采用顶空直接进样方式,经气相色谱-质谱上机检测,在美国国家标准与技术研究院(National Institute of Standards and Technology,NIST)质谱库检索的基础上,结合保留指数及气味物质谱库对挥发性气味物质进行定性分析,最后用面积归一法计算各物质的相对含量。结果表明,19种食品包装用纸中共鉴别出113种挥发性化合物,通过检索气味物质谱库,最终确定出36种挥发性气味物质,主要为醛类、羧酸类、酮类、烯烃类、呋喃类、醇类、酚类及含硫化合物共8大类。其中,主要气味物质包括糠醛、苯甲醛、2-戊基呋喃、乙酸、2-乙基-1-己醇、苯乙烯等。此方法可以快速、准确地鉴别出食品包装用纸中挥发性气味物质,提高了定性分析的工作效率;食品包装纸中挥发性气味物质可能会影响食品气味,需引起高度关注。展开更多
Purpose: To analyze the odor components in food waste treatment process. Method: Cold trap enrichment-GC/MS technology was used to determine the component. Result: The detection results showed that the levels of odora...Purpose: To analyze the odor components in food waste treatment process. Method: Cold trap enrichment-GC/MS technology was used to determine the component. Result: The detection results showed that the levels of odorant concentrations from the main processing units were ranked in the order of: temperature sterilization device > oil-water separator > anaerobic fermenter > separation equipment > unloading area. Oxygenated organic compounds were the main components. Conclusion: Ethanol, hydrogen sulfide, dimethyl disulfide, ammonia, limonene were characteristic pollutants in the unloading areas and separation equipment;ethanol, methyl mercaptan, hydrogen sulfide, dimethyl disulfide, limonene were characteristic pollutants in the temperature sterilization device and oil-water separator;ethanol, hydrogen sulfide, dimethyl disulfide, p-diethylbenzene, limonene were characteristic pollutants in the anaerobic fermenter.展开更多
The food packaging industry generally uses papers and paperboards (PPBs) especially for disposable products. According to the Framework Regulation (EC) No. 1935/2004 of the European Union, no transfer of contamination...The food packaging industry generally uses papers and paperboards (PPBs) especially for disposable products. According to the Framework Regulation (EC) No. 1935/2004 of the European Union, no transfer of contamination should occur from food packaging material to the food items. The aim of this study was to determine the presence, numbers, source and different kinds of bacteria present in food packaging PPBs with various contents of pulp fiber. The samples were randomly collected from popular confectioners and fast food restaurants in Saharanpur, India. The results indicated the presence of bacteria in all the samples, ranging from 1.3 × 102 to 6.1 × 103 cfu/g. Most of the samples contained bacteria in more than the permitted concentration of 2.5 × 102 cfu/g as set by Food and Drug Administration (FDA). The detected bacteria were from genera Bacillacea, Staphylococcus and Pseudomonas. According to the FDA declaration, pathogenic bacteria such as B. cereus and S. aureus have been associated with food borne diseases (FBD). Some contaminants in food packaging PPBs were found to be B. subtilis and P. aeroginosa, which produce enzymes like peroxidases and lipoxygenases that are odor generating enzymes.展开更多
文摘建立一种顶空-气相色谱-质谱法结合保留指数分析食品包装用纸中挥发性气味成分的分析方法。采用顶空直接进样方式,经气相色谱-质谱上机检测,在美国国家标准与技术研究院(National Institute of Standards and Technology,NIST)质谱库检索的基础上,结合保留指数及气味物质谱库对挥发性气味物质进行定性分析,最后用面积归一法计算各物质的相对含量。结果表明,19种食品包装用纸中共鉴别出113种挥发性化合物,通过检索气味物质谱库,最终确定出36种挥发性气味物质,主要为醛类、羧酸类、酮类、烯烃类、呋喃类、醇类、酚类及含硫化合物共8大类。其中,主要气味物质包括糠醛、苯甲醛、2-戊基呋喃、乙酸、2-乙基-1-己醇、苯乙烯等。此方法可以快速、准确地鉴别出食品包装用纸中挥发性气味物质,提高了定性分析的工作效率;食品包装纸中挥发性气味物质可能会影响食品气味,需引起高度关注。
文摘Purpose: To analyze the odor components in food waste treatment process. Method: Cold trap enrichment-GC/MS technology was used to determine the component. Result: The detection results showed that the levels of odorant concentrations from the main processing units were ranked in the order of: temperature sterilization device > oil-water separator > anaerobic fermenter > separation equipment > unloading area. Oxygenated organic compounds were the main components. Conclusion: Ethanol, hydrogen sulfide, dimethyl disulfide, ammonia, limonene were characteristic pollutants in the unloading areas and separation equipment;ethanol, methyl mercaptan, hydrogen sulfide, dimethyl disulfide, limonene were characteristic pollutants in the temperature sterilization device and oil-water separator;ethanol, hydrogen sulfide, dimethyl disulfide, p-diethylbenzene, limonene were characteristic pollutants in the anaerobic fermenter.
文摘The food packaging industry generally uses papers and paperboards (PPBs) especially for disposable products. According to the Framework Regulation (EC) No. 1935/2004 of the European Union, no transfer of contamination should occur from food packaging material to the food items. The aim of this study was to determine the presence, numbers, source and different kinds of bacteria present in food packaging PPBs with various contents of pulp fiber. The samples were randomly collected from popular confectioners and fast food restaurants in Saharanpur, India. The results indicated the presence of bacteria in all the samples, ranging from 1.3 × 102 to 6.1 × 103 cfu/g. Most of the samples contained bacteria in more than the permitted concentration of 2.5 × 102 cfu/g as set by Food and Drug Administration (FDA). The detected bacteria were from genera Bacillacea, Staphylococcus and Pseudomonas. According to the FDA declaration, pathogenic bacteria such as B. cereus and S. aureus have been associated with food borne diseases (FBD). Some contaminants in food packaging PPBs were found to be B. subtilis and P. aeroginosa, which produce enzymes like peroxidases and lipoxygenases that are odor generating enzymes.
