Frequent food poisoning and food-borne diseases outbreaking in recent years have caused people to attach great attention to food safety,especially the food contact materials that are essential in the food industrial c...Frequent food poisoning and food-borne diseases outbreaking in recent years have caused people to attach great attention to food safety,especially the food contact materials that are essential in the food industrial chains and daily lives,ensuring their clean sanitation are of great importance in blocking microbial contamination and spread of food-borne pathogens.Stainless steel(SS)is one of the most accepted and widely used food contact material,and the Cu-bearing SS possesses excellent antibacterial performance and maintains the original mechanical properties of SS,maybe making it a better substitute for the conventional SS in the food area.Taking advantages of bactericidal and antifouling properties of Cubearing SS,this study simulated a variety of food contact scenarios,explored a new strategy for food preservation and food safety by using Cu-bearing SS as a food contact material.The results showed that the Cu-bearing SS could not only delay the spoilage of different foods by inhibiting the activity of microorganisms in foods,but also reduce the expressions of spoilage traits of bacteria as well as the formation of biofilms by quenching the quorum-sensing signals,and further creating a good bacteriostatic atmosphere for the contacted food and its surrounding environment.In addition,the remarkable antifouling property of Cu-bearing SS would give the material a self-cleaning feature for food applications,which can avoid secondary contamination of food as a source of contamination.This study well demonstrates that the Cu-bearing SS has broad application potentials and prospects in the food area.展开更多
This study was conducted to do exposure assessment of the possible migration of antimony trioxide （Sb203） from Polyethylene terephthalate （PET） food contact materials （FCM）. Consumption Factor （CF） and Food-ty...This study was conducted to do exposure assessment of the possible migration of antimony trioxide （Sb203） from Polyethylene terephthalate （PET） food contact materials （FCM）. Consumption Factor （CF） and Food-type Distribution Factor （fT） were calculated from survey data with reference to the US FDA method. The most conservative migration conditions were obtained by testing Sb migration from PET FCM based on the Chinese national standard of GB/T 5009.101-2003[1].展开更多
Non-polar capillary columns for GC/MS are widely utilized in the analysis of additives for food contact materials. Though various kinds of non-polar capillary columns are commercially available, the equality of their ...Non-polar capillary columns for GC/MS are widely utilized in the analysis of additives for food contact materials. Though various kinds of non-polar capillary columns are commercially available, the equality of their performance has not been verified. Herein, ninety-six additives for food contact plastics were analyzed using fifteen kinds of columns, and the peak separation, retention times, and peak areas of each additive were compared. The additives, with various chemical properties, comprised forty four plasticizers, twenty lubricants, twenty antioxidants, nine ultraviolet absorbers, and three other compounds. 10 μg.mL-1 test solutions were prepared in acetone, and injected to the GC/MS. The fifteen columns were classified into five categories based on the chromatogram pattern and peak separation. To facilitate comparison of the retention time and detection sensitivity of the columns for the additives, the relative retention time (RRT) and relative peak area (RPA) were calculated by using dibutylphthalate or 4-tert-butylphenylsalicylate as an internal standard. The RRTs of the additives on each column were essentially similar. However, the RRT of the additives which were detected in the later stages differed slightly. Although the RPA of the plasticizers and lubricants were roughly similar, column-to-column differences were observed for certain additives, such as antioxidants and ultraviolet absorbers. Furthermore, certain fatty acids, antioxidants, two plasticizers, and two benzophenone type ultraviolet absorbers were not detected in the chromatograms of two columns.展开更多
The presence of toxic elements in paper and board food contact materials(FCMs)has been previously shown by various studies employing different sample preparation methods.This study elucidates the influence of migratio...The presence of toxic elements in paper and board food contact materials(FCMs)has been previously shown by various studies employing different sample preparation methods.This study elucidates the influence of migration methods on the migration of toxic elements from recycled paper FCMs to food simulants and compares these methods with exhaustive extraction approaches.Migration samples were prepared with four food simulants as specified in the Commission Regulation(EU)10/2011:3%(volume fraction)acetic acid,10%(volume fraction)and 50%(volume fraction)ethanol,and Tenax.The extraction process underestimated the number and quantity of elements.Migration methodologies revealed distinct element transfer patterns influenced by the physicochemical properties of the food simulants.Toxic elements,including aluminum,cobalt,nickel,arsenic,lead,cadmium,barium,and uranium,were detected in quantities exceeding safety reference values.These findings underscore the need for harmonized migration testing and regulatory-specific migration limits.展开更多
To address the limitations of traditional methods in detecting 3-chloro-1,2-propanediol(3-MCPD)in food contact materials(FCMs)—notably complex operations,prolonged detection cycles,and low sensitivity—this study int...To address the limitations of traditional methods in detecting 3-chloro-1,2-propanediol(3-MCPD)in food contact materials(FCMs)—notably complex operations,prolonged detection cycles,and low sensitivity—this study introduces a novel Molecularly Imprinted Polymer-based Nano-Analytical System(MNAS).This integrated system enables rapid,in situ,and derivatization-free detection of 3-MCPD in paper-based FCMs.The MNAS innovatively combines molecularly imprinted polymers(MIPs)with a quartz crystal microbalance(QCM)sensing mechanism.Guided by density functional theory(DFT),a“pre-organized recognition”strategy was employed to design highly selective imprinting interfaces through precise monomer-template hydrogen bonding configurations.Further insights into the hydrogen bond-driven recognition mechanism were obtained using variable-temperature infrared spectroscopy and multimodal interference validation.This synergistic approach of interfacial molecular configuration control and enhanced mass response mechanisms endows the system with exceptional selectivity and anti-interference capabilities in complex matrices.The detection limit achieved is 0.006µM,significantly surpassing that of traditional GC-MS methods(2.2µM).Moreover,the overall detection process time is reduced by over 75%,eliminating the need for organic extraction and derivatization steps inherent in conventional methods,thereby greatly enhancing operational simplicity and practicality.The MNAS system not only broadens the application scope of MIPs in detecting non-intentionally added substances but also offers a novel strategy for high-throughput,on-site rapid screening of chlorinated contaminants in paper-based materials.This advancement holds significant implications for early warning systems and risk assessment in food safety.展开更多
基金financially supported by the National Natural Science Foundation of China(Nos.51631009 and 51771199)the National Key Research and Development Program of China(No.2016YFB0300205)+1 种基金the Foshan Science and Technology Program(No.2017AG100041)Youth Innovation Promotion Association(No.2018221)。
文摘Frequent food poisoning and food-borne diseases outbreaking in recent years have caused people to attach great attention to food safety,especially the food contact materials that are essential in the food industrial chains and daily lives,ensuring their clean sanitation are of great importance in blocking microbial contamination and spread of food-borne pathogens.Stainless steel(SS)is one of the most accepted and widely used food contact material,and the Cu-bearing SS possesses excellent antibacterial performance and maintains the original mechanical properties of SS,maybe making it a better substitute for the conventional SS in the food area.Taking advantages of bactericidal and antifouling properties of Cubearing SS,this study simulated a variety of food contact scenarios,explored a new strategy for food preservation and food safety by using Cu-bearing SS as a food contact material.The results showed that the Cu-bearing SS could not only delay the spoilage of different foods by inhibiting the activity of microorganisms in foods,but also reduce the expressions of spoilage traits of bacteria as well as the formation of biofilms by quenching the quorum-sensing signals,and further creating a good bacteriostatic atmosphere for the contacted food and its surrounding environment.In addition,the remarkable antifouling property of Cu-bearing SS would give the material a self-cleaning feature for food applications,which can avoid secondary contamination of food as a source of contamination.This study well demonstrates that the Cu-bearing SS has broad application potentials and prospects in the food area.
基金financially supported by the Beijing Natural Science Foundation-Sanyuan Joint FundingNo.15S00033
文摘This study was conducted to do exposure assessment of the possible migration of antimony trioxide （Sb203） from Polyethylene terephthalate （PET） food contact materials （FCM）. Consumption Factor （CF） and Food-type Distribution Factor （fT） were calculated from survey data with reference to the US FDA method. The most conservative migration conditions were obtained by testing Sb migration from PET FCM based on the Chinese national standard of GB/T 5009.101-2003[1].
文摘Non-polar capillary columns for GC/MS are widely utilized in the analysis of additives for food contact materials. Though various kinds of non-polar capillary columns are commercially available, the equality of their performance has not been verified. Herein, ninety-six additives for food contact plastics were analyzed using fifteen kinds of columns, and the peak separation, retention times, and peak areas of each additive were compared. The additives, with various chemical properties, comprised forty four plasticizers, twenty lubricants, twenty antioxidants, nine ultraviolet absorbers, and three other compounds. 10 μg.mL-1 test solutions were prepared in acetone, and injected to the GC/MS. The fifteen columns were classified into five categories based on the chromatogram pattern and peak separation. To facilitate comparison of the retention time and detection sensitivity of the columns for the additives, the relative retention time (RRT) and relative peak area (RPA) were calculated by using dibutylphthalate or 4-tert-butylphenylsalicylate as an internal standard. The RRTs of the additives on each column were essentially similar. However, the RRT of the additives which were detected in the later stages differed slightly. Although the RPA of the plasticizers and lubricants were roughly similar, column-to-column differences were observed for certain additives, such as antioxidants and ultraviolet absorbers. Furthermore, certain fatty acids, antioxidants, two plasticizers, and two benzophenone type ultraviolet absorbers were not detected in the chromatograms of two columns.
基金funded by the Netherlands Food and Consumer Product Safety Authority(NVWA)under the Ministry of Agriculture,Nature and Food Quality of the Netherlands with funding number 1400011703.
文摘The presence of toxic elements in paper and board food contact materials(FCMs)has been previously shown by various studies employing different sample preparation methods.This study elucidates the influence of migration methods on the migration of toxic elements from recycled paper FCMs to food simulants and compares these methods with exhaustive extraction approaches.Migration samples were prepared with four food simulants as specified in the Commission Regulation(EU)10/2011:3%(volume fraction)acetic acid,10%(volume fraction)and 50%(volume fraction)ethanol,and Tenax.The extraction process underestimated the number and quantity of elements.Migration methodologies revealed distinct element transfer patterns influenced by the physicochemical properties of the food simulants.Toxic elements,including aluminum,cobalt,nickel,arsenic,lead,cadmium,barium,and uranium,were detected in quantities exceeding safety reference values.These findings underscore the need for harmonized migration testing and regulatory-specific migration limits.
基金supported by the Guangxi Natural Science Foundation of China(2023GXNSFGA026001 and 2025GXNSFAA069956).
文摘To address the limitations of traditional methods in detecting 3-chloro-1,2-propanediol(3-MCPD)in food contact materials(FCMs)—notably complex operations,prolonged detection cycles,and low sensitivity—this study introduces a novel Molecularly Imprinted Polymer-based Nano-Analytical System(MNAS).This integrated system enables rapid,in situ,and derivatization-free detection of 3-MCPD in paper-based FCMs.The MNAS innovatively combines molecularly imprinted polymers(MIPs)with a quartz crystal microbalance(QCM)sensing mechanism.Guided by density functional theory(DFT),a“pre-organized recognition”strategy was employed to design highly selective imprinting interfaces through precise monomer-template hydrogen bonding configurations.Further insights into the hydrogen bond-driven recognition mechanism were obtained using variable-temperature infrared spectroscopy and multimodal interference validation.This synergistic approach of interfacial molecular configuration control and enhanced mass response mechanisms endows the system with exceptional selectivity and anti-interference capabilities in complex matrices.The detection limit achieved is 0.006µM,significantly surpassing that of traditional GC-MS methods(2.2µM).Moreover,the overall detection process time is reduced by over 75%,eliminating the need for organic extraction and derivatization steps inherent in conventional methods,thereby greatly enhancing operational simplicity and practicality.The MNAS system not only broadens the application scope of MIPs in detecting non-intentionally added substances but also offers a novel strategy for high-throughput,on-site rapid screening of chlorinated contaminants in paper-based materials.This advancement holds significant implications for early warning systems and risk assessment in food safety.
