Heavy metal uptake from greenhouse border soils for edible vegetables

Six essential elements, cadmium and lead were determined in some horticultural species cultivated in greenhouse borders by atomic absorption spectrophotometry to evaluate the contribution of these vegetables to the daily intake of cadmium and lead in Spain. The existence of significant differences ( P <0.001) in the levels of metallic concentration found among the vegetable species has been proved, and the greater capacity of concentration of heavy metals, except copper, in green beans was observed. No statistically significant correlation ( P > 0.05) between the concentration of the soil and that of corresponding vegetable species was found. The heavy metal uptake from soil to plants is a function of the physical and chemical nature of the soil and is altered by innumerable environmental and human factors. If the mean levels of cadmium and lead (0.029 mg kg^?1 and 0.221 mg kg^?1 respectively) are taken into account, the daily intake contribution of these metals will be 1.4 μg day^?1 for cadmium and 11 μg day^?1 for lead.     

Heavy metal bioaccumulation by cultivated Agaricus bisporus from artificially enriched substrates

 Cultivated Agaricus bisporus possess the ability to bioaccumulate seven heavy metals (Pb, Cd, Hg, Fe, Cu, Mn, and Zn). The cultivated champignon mushroom A. bisporus was grown in soil composts of 16 different compositions. An edible mushroom, A. bisporus was also cultivated on humic compost artificially fortified with the seven heavy metals at five different concentrations (0.1 mg/kg, 0.5 mg/kg, 1.0 mg/kg, 3.0 mg/kg, and 10.0 mg/kg) and on control substrate (0 mg/kg) on a dry weight basis. The method of measuring bioaccumulation was flame atomic absorption spectrophotometry. Received: 1 October 1997 / Revised version: 19 January 1998     

Investigation of heavy metal levels in economically important fish species captured from the Tuzla lagoon

Two hundred fish samples were collected seasonally from November 2000 to December 2001 from the Tuzla Lagoon. Heavy metal (Cd, Pb, Cu, Zn, and Fe) concentrations were measured in the muscle, gill, liver and gonad of three fish species (Sparus aurata, Dicentrarchus labrax and Mugil cephalus). The concentrations of heavy metals were determined by using flame atomic absorption spectrophotometry (FLAAS) and graphite furnace atomic absorption spectrophotometry (GFAAS) after wet digestion method.     

电子商务在食品供应链及食品安全中的应用

作为一种商务模式,电子商务在很多领域中得到了广泛应用。利用电子商务能够充分发挥食品供应链的优势,通过食品供应链和电子商务的有机结合,食品企业能够更好地保障食品安全,有效应对行业内日益激烈的市场竞争,全面提升企业自身的市场竞争力。本文对电子商务在食品供应链及食品安全中的作用和优势进行了论述和分析,介绍了基于电子商务的食品供应链和食品安全管理的理念,并立足于信息共享机制的建立和协同整合对其前景进行了介绍和分析。     

Contents of cadmium, copper, mercury and lead in fish from the Neretva river (Bosnia and Herzegovina) determined by inductively coupled plasma mass spectrometry (ICP-MS)

The concentrations of cadmium, copper, mercury and lead in fish from the Neretva river have been investigated in order to assess safety for consumers and the level of contamination. Samples of muscle and liver from six fish species (brown trout, common carp, prussian carp, chub, rudd and gray mullet) were collected at six locations upstream and downstream from the three largest towns along the Neretva river. Metal concentrations were determined by inductively coupled plasma mass spectrometry after microwave-assisted acid mineralisation. Accumulation of metals in fish tissues was species-dependent. The average content of metals in fish muscle samples was 0.013-0.055, 0.068-16.059, 0.050-0.401 and 0.055-0.703 mg/kg for Cd, Cu, Hg and Pb, respectively. Health effects due to fish consumption could not be excluded. Further investigation is recommended, including a survey of fish consumption frequency among the local inhabitants and sports fishermen.     

食品安全视角的食品供应链物流运行机制研究

近年来,随着我国居民对健康的重视程度不断提升,食品安全问题也逐渐成为人们关注的焦点问题。食品供应链物流环节较长,容易引发食品安全问题,因此对食品供应链物流运行机制的研究具有重要意义。本文通过分析食品供应链物流的现状,指出了食品供应链物流中制约食品安全的因素,包括:食品物流包装不合格、食品供应链物流基础设施不完备、信息化程度低和缺乏食品安全监督机制。最后提出了建立保障食品安全的食品供应链物流运行机制,主要从建立食品供应链物流企业信用评价体系、建立食品供应链物流的科学协同机制、建立食品供应链物流的信息化保障机制以及监督机制4方面进行了论述。     

ICP-MS法测定食品、食品添加剂及食品包装材料中重金属元素的研究进展

电感耦合等离子体质谱法（ICP-MS）是检测痕量重金属最有效的方法之一,其所具备的灵敏度高、线性范围广、检出限低、多元素同时检测等优点,使其广泛应用于复杂基质中重金属含量的检测。该文综述了近年来ICP-MS在食品基质中重金属含量测定方面的应用现状,对其检测原理、运行参数及应用领域等进行了总结,同时还展望了ICP-MS在食品、食品添加剂及食品包装材料中重金属检测的发展趋势,以期为ICP-MS技术在食品重金属检测领域更广泛的应用提供参考,同时为保障食品安全提供技术借鉴。     

2019年河北省市售虾蛄(皮皮虾)重金属污染情况调查

目的 了解2019年河北省市售虾蛄中重金属污染情况.方法 按照《2019年河北省食品污染物风险监测方案》的要求,对河北省11个地市及雄安新区共计106份虾蛄样品进行Pb、Ni、Hg(总)、As(总)、Li、V、Mn、Ba、Cd、Cr、Al、Sb、Cu、Sn、Se共15种元素的检测,并对检测结果进行统计分析.结果 Hg、...     

不同牧场鲜牛乳中重金属含量的研究

目的 考察4个牧场的生鲜牛乳的重金属污染情况,评估鲜牛乳原料的安全性.方法 采用国家标准检测方法对4个牧区的生牛乳中重金属铬、铅、汞以及金属砷进行检测,其中使用石墨炉原子吸收光谱法测定铅和铬的含量,使用氢化物发生原子荧光光谱法测定总砷含量,使用原子荧光光谱分析法测定总汞的含量.结果 铬含量最高的为DR牧场(0.052 ...     

商业模式创新背景下品牌休闲食品供应链的重构

通过分析电商模式下传统品牌休闲食品供应链存在的问题,提出品牌休闲食品企业应紧跟商业模式创新步伐,降低生产成本、扩大产品销售渠道、提高物流配送效率;指出品牌休闲食品企业亟须在创新商业模式背景下重构供应链,打通线上线下全渠道供应链,提升整体流通效率,构建良性零售圈。     

Heavy metal concentrations in raw milk collected from different regions of Samsun,Turkey

In this study, 144 raw milk samples were analysed for heavy metal contamination derived from emissions from industrial operations in Tekkekoy, Samsun, Turkey. Cu, Fe, Zn, Cr, Ni, Cd, As and Pb levels in samples were determined by inductively coupled plasma mass spectrometry (ICP‐MS). The average amounts of copper, chromium, iron, zinc, nickel, cadmium, arsenic and lead were determined as 1.130, 0.441, 12.920, 0.032, 0.483, 0.006, 0.003 and 0.004 mg/kg, respectively. It was determined that the summer period has the highest levels for copper, lead and cadmium. The highest contents of arsenic and copper were found at the two industrial regions that were close to Black Sea, described as ‘1st’ and ‘2nd’ region. Whereas the 3rd and 4th regions that were far from an industrial zone and also from the Black Sea, nickel, lead and chromium had the highest levels.     

我国食品冷藏链的现状与发展对策

介绍了国内外食品冷藏链发展概况,分析了我国食品冷藏链的现状及存在的问题,提出了发展我国食品冷藏链的对策与建议。     

Application of solid phase extraction techniques to analyse volatile compounds in wines and other enological products

Aroma compounds are most closely associated with the volatile fraction of foods. Common analytical separation procedures employed to analyse volatile compounds need, even today, that prior to GC analysis of an aroma or a fragrance, these compounds be concentrated or/and isolated from the non-volatile matrix. This step constitutes a problem that has still not been satisfactorily resolved and for this, several sample preparation methods can be found into the bibliography. This review gives a brief overview of solid phase extraction techniques to analyse volatiles. Procedures such as solid phase extraction (SPE), solid phase microextraction (SPME), stir bar sorptive extraction (SBSE), and the recent solid phase dynamic extraction (SPDE) will be discussed and critically evaluated. Contemporary applications of these techniques to the study of volatile compounds in wine and other enological products will be presented.     

Review of micro- and nanoplastic contamination in the food chain

Whereas the dramatic environmental impact of plastic waste rightfully receives considerable attention by scientists, policy makers and public in general, the human health impact of micro- and nanoplastics contamination of our food and beverages remains largely unknown. Indeed, most studies aim at understanding the environmental impact rather than the human health impact of a possible exposure to micro- and nanoplastics. In addition, these papers generally lack a methodological, standardised approach. Furthermore, some studies focus on the damage to and contamination level of animal species collected from the wild environment, and others investigate the rate and biology of microplastic uptake of animals fed with microplastics in laboratory. This review aims at understanding human exposure. Since there is, with few exceptions, no evidence available on the presence of micro- and nanoplastics in a normal diet, this study takes an indirect approach and analyses peer-reviewed publications since 2010 that document the presence of micro- and nanoplastics in those animals (more than 200 species) and food products that are part of the human food chain and that may thus contribute directly or indirectly to the uptake of micro- and nanoplastics via the human diet. It also addresses the question of the definitions, the methodologies and the quality criteria applied to obtain the reported results. This review suggests that, beyond a few estimations and comparisons, precise data to assess the exact exposure of humans to micro- and nanoplastics through their diet cannot be produced until standardised methods and definitions are available.     

Microbes versus microbes: control of pathogens in the food chain

Foodborne illness continues as a considerable threat to public health. Despite improved hygiene management systems and increased regulation, pathogenic bacteria still contaminate food, causing sporadic cases of illness and disease outbreaks worldwide. For many centuries, microbial antagonism has been used in food processing to improve food safety. An understanding of the mode of action of this microbial antagonism has been gained in recent years and potential applications in food and feed safety are now being explored. This review focuses on the potential opportunities presented, and the limitations, of using microbial antagonism as a biocontrol mechanism to reduce contamination along the food chain; including animal feed as its first link. © 2014 Society of Chemical Industry     

基于供应链风险管理的食品流通数据库研究

随着大数据时代的到来,数据作为新的生产要素起到了越来越重要的作用。在食品安全领域,频发的食品安全质量问题引起人们对食品质量的高度重视,其主要原因在于食品供应链环节存在风险,因此,对供应链流通链条的风险控制、进行食品信息的可追溯构建显得尤为重要。由于食品交易的信息不对称性,一旦发生食品安全事件,食品流通过程的数据信息将对问题的溯源起到至关重要的作用。因此,本文试图从供应链的角度对食品流通过程的信息进行整合分析,基于各个环节的风险管理目标,通过对食品从采购、到加工、贮存、运输、销售的各个环节的信息进行全方位的记录,提出建立食品流通数据库的基本构想,以期对国家食品流通数据库的建设提供参考,为食品安全质量控制和国家宏观调控做出贡献。     

HACCP在食品可持续供应链构建中的作用初探

基于构建可持续供应链食品安全保障体系背景,结合危害分析与关键控制点（HACCP）及HACCP认证发展应用的现状,初步分析了HACCP在食品可持续供应链构建中的作用,提出HACCP认证发展建议,以期为认证机构和管理部门有效实施HACCP认证提供理论基础,使HACCP认证成为市场调节食品安全管理资源配置的一个重要的工具。     

食品安全监管模式创新与食品供应链安全风险控制的研究

针对现有食品安全监管模式在食品安全风险控制中存在的弊端,基于供应链视角,在分析食品安全监管模式创新成因的基础上,构建了食品安全监管模式的创新体系,指出食品安全监管创新链包含的传递路径是全程监管、联动监管、法律监管、社会监管;基于监管创新链,提出食品供应链安全风险控制策略,希望为食品安全监管部门以及食品行业相关决策部门提供一定的决策支持。      

生物传感技术在食品中重金属检测中的应用进展

食品重金属污染事件常见报道,重金属在人体内积累后,可通过干扰人体蛋白质和酶的运输而产生生理毒性。因此,重金属的检测对于保障食品安全具有重要意义。近年来,生物传感检测技术因其方法构建灵活、特异性强、检测效率高和易于便携化等优点,广泛应用于临床诊断、药物分析、环境检测和食品安全领域。尤其在食品中重金属污染的检测中,生物传感方法可提供灵活多变的检测策略,且易于实现现场快速检测。本文总结了食品重金属污染的传统检测方法和新型检测方法,重点介绍了荧光、表面增强拉曼、电化学、场效应晶体管等生物传感器的优缺点,为食品中重金属污染物的检测和控制提供参考,同时也有助于促进检测新技术的发展,为规范食品安全和提高食品质量提供新思路。     

中国易腐食品冷链物流现状分析及优化研究

中国是易腐食品生产大国、加工大国和消费大国,发展食品冷链物流具有重大的战略意义。文章从界定食品冷链物流概念的基础出发,分析其构成、条件、特点,指出目前存在的问题,并在此基础上提出了优化措施。