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Food Control
Elsevier Science Ltd.
Food Control

Elsevier Science Ltd.

0956-7135

Food Control/Journal Food ControlSCIISTP
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    Development, validation and application of a fast GC-FID method for the analysis of volatile compounds in spirit drinks and wine

    Paolini, MauroTonidandel, LorisLarcher, Roberto
    11页
    查看更多>>摘要：In this work, a fast GC-FID method for the analysis of principal volatile compounds in spirit drinks and wines was presented. With a chromatographic run of 8 min were identified and quantified sixteen volatile compounds belonging to different chemical classes: acetals (1,1-diethoxyethane or acetal), aldehydes (acetaldehyde), alco-hols (methanol, 1-hexanol, 2-methylbutan-1-ol, 2-methylpropan-1-ol, 2-phenylethanol, 3-methylbutan-1-ol, butan-1-ol, butan-2-ol and propan-1-ol) and ethyl esters (ethyl acetate, ethyl formate and ethyl lactate). These compounds are responsible for the quality of alcoholic beverages, affecting the aromatic composition and the wholesomeness of the final products. For this reason, their quantification is essential to optimize the fermen-tation conditions, storage techniques and distillation process. Validation of the method was performed in terms of matrix effect, limit of detection, limit of quantification, linearity, recovery, repeatability and reproducibility. Once validated, the developed method was tested suc-cessfully on real enological samples, demonstrating its applicability in the daily practice of analytical laboratories.
      原文链接:
    • NSTL
    • Elsevier

    Volatolomics approach for authentication of not-from-concentrate (NFC) orange juice based on characteristic volatile markers using headspace solid phase microextraction (HS-SPME) combined with GC-MS

    Zhang, JiukaiLiu, HanluSun, RuixueZhao, Yan...
    10页
    查看更多>>摘要：The not-from-concentrate (NFC) juice is gradually becoming popular with consumers. However, adulteration of NFC juice with low-priced from-concentrate (FC) juice has been a long-lasting concern. In the present study, a volatolomics approach for authentication of NFC orange juice based on volatile organic compounds (VOCs) was established. A total of 107 VOCs were identified by solid phase microextraction (SPME) GC-Q-Exactive Orbitrap. Discrimination of NFC and FC orange juice could be accomplished by orthogonal partial least squares discrim-inant analysis (OPLS-DA). Furthermore, 10 VOCs were selected as potential characteristic markers in different juices, including 4 esters, 5 alcohols and 1 ketone. In addition, 13 VOCs with significant quantitative difference was also screened. A partial least squares discriminant analysis (PLS-DA) model based on the above 23 VOCs achieved accuracy of 100% and 95.6% for calibration and prediction set, respectively. These results suggested that the volatolomics approach has great potential for authentication of NFC juice.
      原文链接:
    • NSTL
    • Elsevier

    The dual-mode platform based on cysteamine-stabilized gold nanoparticles for the high throughput and on-site detection of bongkrekic acid

    Song, HuilinLuo, XiWu, DanLiu, Wenyuan...
    9页
    查看更多>>摘要：This article describes the visual detection of bongkrekic acid (BA) by cysteamine modified gold nanoparticles (CS-AuNPs) as colorimetric probes. Polycarboxyl structured BA induces the aggregation of CS-AuNPs through electrostatic interaction, which results in the color change of CS-AuNPs from wine-red to blue-violet. The ratio of absorbance at 650 nm and 524 nm (A650/A524) increases linearly in the 0.18-1.64 mu M BA concentration range, and the detection limit is 3.43 nM. Moreover, when combined with solid phase extraction (SPE), the method can also be used for specific detection of BA in complex food matrix (tremella). The recoveries in urine, serum, and tremella ranged from 89.31% to 109.63%. Interestingly, a smartphone application (APP) was applied to identify the R, G, and B values of the solution, and the quantitative curve was established by calculating the gray value. This approach was then used to quantify the BA in the sample solution. The linear range of APP detecting is 0.10 mu M-1.44 mu M and the detection limit is 12.33 nM. This method can be used not only for food safety monitoring, but also for preliminary clinical screening of BA poisoning.
      原文链接:
    • NSTL
    • Elsevier

    Plant DNA barcoding and metabolomics for comprehensive discrimination of German Chamomile from its poisonous adulterants for food safety

    Eldakak, MoustafaBahey-El-Din, MohammedDarwish, Fikria A.El Sebakhy, Nadia A....
    9页
    查看更多>>摘要：German Chamomile (Matricaria recutita L.) is one of the most consumed herbal teas in the world. Deliberate and undeliberate adulteration in German Chamomile raw material represents serious concerns for consumers' safety. Authentication of Matricaria recutita L. samples was performed using an integrative approach of DNA barcoding and chemical profiling. Discrimination of M. recutita from three morphologically related species namely Anthemis cotula L., Senecio desfontainei Druce and Senecio vulgaris L. was accomplished. Three plastid loci (mat K, rbcL and psbA-trnH) and two nuclear spacers (ITS and ITS2) were utilized for the DNA barcoding of M. recutita. The Chemical profiling of M. recutita was achieved using untargeted HPTLC-image analysis. Among the tested barcoding loci, ITS2 revealed the maximum genetic diversity among the studied plants. ITS2 showed adequate polymorphic sites to detect interspecific variation with high amplification and sequencing success. Chemical profiling showed that flavonoids, coumarins, sesquiterpene lactones and phenolic acids are the main secondary metabolite classes of the candidate plants. While, flavonoids and phenolic acids served as quality markers, sesquiterpene lactone (anthecotulide) and pyrrolizidine alkaloid (senecionine) accounted as toxicity markers for the adulterants. Notably, coumarin accumulation pattern could be utilized to discriminate M. recutita from its adulterants due to the absence of hernarin and umbelliferone from Senecio species. The results of this study suggest that, integrating genetic and metabolomic fingerprinting could serve as an effective tool, with 100% success rate, in authenticating M. recutita and discriminating its samples from the morphologically related toxic adulterants. This offers a comprehensive tool for the quality control of M. recutita samples in food industry.
      原文链接:
    • NSTL
    • Elsevier

    Encapsulation of essential oils and their application in antimicrobial active packaging

    Mukurumbira, A. R.Shellie, R. A.Keast, R.Palombo, E. A....
    14页
    查看更多>>摘要：Contamination of food by spoilage and pathogenic microorganisms is a major challenge to public health, food security and sustainability. As a response, there has been a growing interest in the exploration of alternative antimicrobial agents such as essential oils. Although essential oils can be potent antimicrobials, they are chemically and biologically labile and have strong aromas which limit their application as food antimicrobial additives. This has shifted essential oil research from direct food applications towards the use of encapsulated essential oils in active packaging. Various encapsulation methods are increasingly being explored as a way of stabilizing essential oils, masking their aromas and possibly improving their antimicrobial activity with a more sustained release of the antimicrobials. Encapsulated essential oils have mainly been investigated as direct preservatives but their merit in active packaging is comparatively less explored. The current review will critique some currently available encapsulation techniques and their effect on the antimicrobial efficacy, release profiles, stability and sensory properties of the essential oils. Furthermore, the application of encapsulated essential oils in biodegradable active packaging will be explored by focusing on the antimicrobial efficacy, release properties and physicochemical properties of the packaging.
      原文链接:
    • NSTL
    • Elsevier

    Halogenated polycyclic aromatic hydrocarbons and their parent compounds in ready-to-eat seafood rich in salt: Method validation, profiles, correlation, and exposure risks

    Li, WeiWu, Shimin
    10页
    查看更多>>摘要：The coexistence of polycyclic aromatic hydrocarbons (PAHs) and halogenated PAHs (XPAHs) in fresh seafood poses a threat to food safety and attracts much attention recently, while ready-to-eat seafood is more susceptible to XPAHs contamination through the secondary formation of XPAHs during processing. Little has been known about PAHs and XPAHs in ready-to-eat seafood so far. In this study, a modified QuEChERS combined with GCMS/MS method for the determination of PAHs and XPAHs in ready-to-eat seafood was developed and validated. Forty-two analytes including PAHs, chlorinated and brominated PAHs (Cl/BrPAHs) were investigated in 32 ready-to-eat seafood including shredded squid and cod fillet. Concentrations of PAHs/XPAHs in shredded squid (mean value at 68.32/4.99 mu g/kg) were generally higher than those in cod fillet (mean value at 61.81/0.54 mu g/ kg). The concentration of ClPAHs showed a significant correlation with that of PAHs (r = 0.576, p < 0.05) and Cl- (r = 0.709, p < 0.01), which indicated that ClPAHs were mainly derived from the reaction of their parent PAHs and Cl-. Cl/BrAnt were predominant components of XPAHs. The concentration of XAnts showed a significant correlation with Ant. Meanwhile, the high ratio of 9,10-Cl(2)Ant/9-ClAnt showed a newly formed source instead of aged pollution, and therefore enhanced the potential of secondary formation source of XPAHs instead of direct pollution. The toxic equivalent quotient concentrations of XPAHs (mean value at 1.17 mu g/kg) were even higher than that of PAHs (mean value at 0.48 mu g/kg) in shredded squid. The maximum allowable consumption rate of ready-to-eat seafood was estimated based on the HQ and ILCR model. The results suggested a potential carcinogenic risk for seafood snack lovers (intake rate > 27.2 g/d) via dietary intake of ready-to-eat seafood.
      原文链接:
    • NSTL
    • Elsevier

    DNA metabarcoding of fungal communities in Heshouwu (Polygonum multiflorum Thunb.)

    Guo, MengyueYu, JingshengDao, YujieJiang, Wenjun...
    9页
    查看更多>>摘要：Heshouwu, derived from the dried root tuber of Polygonum multiflorum Thunb., is a widely used functional food and medicinal herb. Mycotoxin pollution of Heshouwu samples has become an emergent issue that cannot be ignored. In this study, the presence of fungi in commercial Heshouwu samples was investigated, and the differences in fungal community in samples from different collection sites and processing approaches were analyzed by DNA metabarcoding. Results showed that Ascomycota and Basidiomycota were the predominant phyla. At the genus level, Aspergillus (2.14%-94.05%), Cladosporium (0.22%-41.18%), Candida (0%-87.40%), Penicillium (0.01%-27.45%), and Alternaria (0%-32.29%) were the main genera. Meanwhile, six potential toxigenic fungi and one human pathogen, namely, Aspergillus flavus, Aspergillus nomius, Aspergillus tamarii, Fusarium solani, Penicillium paxillin, Penicillium steckii, and Candida tropicalis, were detected. In addition, differences in fungal diversity, community composition, trophic modes, and functional groups of Heshouwu samples from five collection sites and two processing approaches were observed. This study provides a comprehensive understanding of the fungal communities of Heshouwu, thereby providing a basis for future research on the prevention of mycotoxin contamination in this important medicinal herb.
      原文链接:
    • NSTL
    • Elsevier

    Highly absorbent antibacterial chitosan-based aerogels for shelf-life extension of fresh pork

    Chen, LinNiu, XueningFan, XiaojingLiu, Yaping...
    9页
    查看更多>>摘要：In this study, the CS-DAS aerogels were prepared using chitosan (CS) crosslinked by dialdehyde starch (DAS), with the best absorption and mechanical properties at the weight ratio of CS to DAS being 7:3. The copper nanoparticles (CuNPs) were first prepared by green reduction method, then encapsulated by liposomes (LipCuNPs) for controlling their sudden release. The antibacterial aerogels (CD/Lip-CuNPs) were developed by incorporating the Lip-CuNPs into the aerogel (7:3). The porous network structure of aerogels realized the further gradual release of CuNPs. The CD/Lip-CuNPs aerogels had good antimicrobial properties, which could preserve fresh pork for 14 d at 4 C without spoilage. Moreover, the CuNPs migrated from the aerogels into fresh pork was at a safe level of 3.38 mg/kg after 14 d at 4 C. The obtained antibacterial CD/Lip-CuNPs aerogels had the potential for extending the shelf life of fresh meat.
      原文链接:
    • NSTL
    • Elsevier

    Application of saponins extract from food byproducts for the removal of pesticide residues in fruits and vegetables

    Hsu, Wei-HanChen, Sheng-YiLin, Jia-HongYen, Gow-Chin...
    11页
    查看更多>>摘要：Vegetables and fruits may contain pesticides, leading to several health complications after long-term exposure. The food byproducts of soybean and camellia seed cake contain abundant saponins but are poorly utilized. This study aimed to investigate the capacity of soybean byproduct-extracted saponins (SBE) and camellia seed cake-extracted saponins (CSE) to remove pesticide residues in fruits and vegetables. Total saponin contents of soybean byproducts and camellia seed cake were 40.32 +/- 1.50 mg/g and 216.49 +/- 0.79 mg/g, respectively. Pesticide residues in field-sprayed fruits and vegetables were significantly dislodged by 0.1 mg/mL SBE-or CSE-assisted aeration washing processes compared to tap water and commercial detergent cleaning products. The results indicate that aeration combined with SBE or CSE is an effective technique for removing pesticide residues. In conclusion, these results provide compelling evidence that SBE and CSE are eco-friendly for washing pesticide residues off, and may be suitable for applying the fresh-cut vegetables and fruits industry.
      原文链接:
    • NSTL
    • Elsevier

    A review of the presence of formaldehyde in fish and seafood

    Jinadasa, B. K. K. K.Elliott, ChristopherJayasinghe, G. D. T. M.
    8页
    查看更多>>摘要：Fish is an excellent source for high-quality protein, good fat (omega 3 and 6), vitamins (B, D), and minerals (Ca, P, Zn, I, Mg, K, etc.) and can lower blood pressure and help reduce the risk of a heart attack or stroke. The illegal addition of formaldehyde (FA) to extend the shelf life is a common problem reported in many countries and the FA is classified as a group 1 human carcinogen by the International Agency for Research on Cancer (IARC). There is also the natural formation pathway of FA in fish and seafood. This article summarises the FA levels in fish and seafood (from 2000), formation pathways, health risk assessment, regulations, and analytical techniques to measure FA. It is shown that the reported FA levels are frequently higher than the recognised safety level of 5 mg/kg. This review highlights the requirement of a broad scale effort to measure the indigenous FA levels in fish and ensure that this can be differentiated by the illegal addition of FA. This will allow the strengthening of regulations and allow monitoring to detect and deter the practice of illegal addition of FA to fish and seafood.
      原文链接:
    • NSTL
    • Elsevier