共查询到20条相似文献,搜索用时 0 毫秒
1.
纸质食品包装材料中 26 种有机残留物的检测 总被引:5,自引:2,他引:3
目的建立纸质食品包装材料中7种指示性多氯联苯、7种增塑剂、7种氯酚类化合物、2种二苯酮类化合物,以及4-辛基酚、2-异丙基硫杂蒽酮和硬脂酸甲酯同时检测的分析方法。方法采用超声提取,气相色谱-串联四极杆质谱多反应监测模式分析。结果 26种有机残留物在0.02~2.0 mg/kg范围内线性关系良好(r20.997),加标浓度在0.1 mg/kg时的平均回收率为88.9%~105.5%,相对标准偏差低于12.2%;方法的检出限为0.000 90~0.0035 mg/kg,定量限为0.0031~0.012 mg/kg。应用该方法对实际样品进行了检测,发现绝大多数样品中均检测出邻苯二甲酸二苯酯类增塑剂(检出含量为0.006~7.02 mg/kg),部分样品还检测出硬脂酸甲酯(检出含量为0.069~0.43 mg/kg)。结论该方法简单、快速、准确、灵敏,可用于纸质食品包装材料及类似基质中多种有机残留物的同时检测。 相似文献
2.
HS-GC/MS法检测食品塑料包装中的挥发性有机物 总被引:1,自引:5,他引:1
采用顶空-气相色谱/质谱联用技术检测了两种食品用塑料包装袋中可能残留的挥发性有机物:苯、乙苯、邻二甲苯、间/对二甲苯、异丙醇、乙酸乙酯、乙酸丁酯.结果证明,所建立的方法分离效果理想,线性关系良好,线性相关系数均大于0.999,检出限均达到10-3数量级,能够满足实际分析的要求. 相似文献
3.
研究了氢氧化钠(NaOH)、硅酸钠(Na2SiO3)、碳酸钠(Na2CO3)三种试剂预处理后的回收包装纸颗粒粒径分布以及不同预处理条件对纸粉出粉率、形态的影响,得出了较优的处理工艺,以解决其作为填料制备高密度聚乙烯(HDPE)基纸塑复合材料时由于结团堵塞挤出机、架桥等问题。分析了氢氧化钠预处理回收包装纸纤维的分散特性,结果表明,这三种试剂中NaOH预处理效果最好,在NaOH浓度为3.5%,浴比为1∶12,常温处理40min的条件下,可获得分散性良好,出粉率较高的纸粉。 相似文献
4.
Christian Kirchnawy Johannes Mertl Veronica Osorio Helge Hausensteiner Michael Washüttl Johannes Bergmair Michael Pyerin Manfred Tacker 《Packaging Technology and Science》2014,27(6):467-478
Migrates from plastic food packaging were tested for oestrogen activity by yeast oestrogen screen and subsequently analysed by gas chromatography—mass spectrometry and high‐performance liquid chromatography—mass spectrometry to identify oestrogen‐active chemicals. Plastic samples were migrated according to EC 10/2011 with worst case scenarios being used. Food simulants consisted of either 10–95% ethanol or ultrapure water. Migrates were concentrated afterwards by solid phase extraction. Food contact material tested included polyethylene terephthalate, polypropylene, polyethylene, polystyrene and composite films. Oestrogenic activity ranging from 0.7 to 59 ng/l 17ß‐estradiol equivalents was detected in seven out of 42 samples tested. The highest activity was found in a composite film sample. All 11 polyethylene terephthalate samples tested negative for oestrogen activity. A number of chemicals with known or supposed oestrogen activity were identified in migrates of oestrogen‐active samples. These include butylated hydroxytoluene, 1,3‐diphenylpropane, 1,2‐diphenylcyclobutane and dibutyl phthalate. Copyright © 2013 John Wiley & Sons, Ltd. 相似文献
5.
In recent years, Japan has been witnessing a mounting interest in the recycling of waste paper as a way of protecting the environment. Yet the manufacture of recycled paper has always been subject to the problem of plastic, metal or PE-laminated paper chips mixing in. Especially the contaminants from adhesive tapes and labels (stickies) have posed a difficult problem for the manufacturers of recycled paper. Therefore, the development of repulpable products substituting for them has long been an earnest desire for the industry. To solve this problem, a comprehensive investigation into the pressure-sensitive adhesive, the release agent and the base paper has been carried out, and repulpable PSA packaging tapes and labels that are well suited for the manufacture of recycled paper have been successfully developed. © 1998 John Wiley & Sons, Ltd. 相似文献
6.
目的 以食品接触用纸/铝/塑复合包装为研究对象,结合应用非靶向高通量筛查技术和安全风险评价方法,全面研究这类多层复合包装在接触食品过程中的迁移风险。方法 采用顶空气相色谱-串联质谱、气相色谱-四极杆飞行时间质谱和液相色谱-四级杆飞行时间质谱全面筛查食品接触用纸/铝/塑复合包装在不同迁移条件下的挥发性、半挥发性和非挥发性迁移物质,基于商业数据库、实验室自建库及行业信息解析物质化学结构及可能来源,利用内标半定量迁移水平,结合国内外食品接触材料法规和安全风险评估方法进行符合性评价及风险评价。结果 20批纸/铝/塑复合食品包装在体积分数为4%的乙酸模拟物中未发现迁移风险,在体积分数为95%的乙醇模拟物中共计检出35种物质,可能源于溶剂、抗氧剂、爽滑剂、低聚物、抗氧剂氧化/降解产物等物质。其中,33种物质经法规评估及毒理学评估,显示风险较低;其余2类聚烯烃低聚物因结构难以确定、缺乏毒理学研究建议持续关注毒理学研究进展及国内外法律法规动态。结论 通过结合应用非靶向高通量筛查技术和安全风险评估方法研究表明,在通常的使用条件下,纸/铝/塑多层复合包装用于盛装果汁等水性食品时不存在安全风险,但接触高乙醇含量或油脂类食品时建议关注聚烯烃类低聚物的迁移安全性。 相似文献
7.
目的探索纸质食品、药品包装与纸基微流控检测芯片的整合方法与规律。方法在传统纸质食品或药品包装的内表面,通过喷蜡打印的方法,整合具有特定生物化学检测作用的纸基微流控芯片,并探索微流体在包装内表面构成的纸基微流控芯片中的运用规律。结果通过喷蜡打印,成功地将纸基微流控芯片整合在了传统纸质食药包装的内表面,经过测试可以完成液体pH检测等基础生物化学检测应用。结论将纸基微流控芯片与食药纸质包装相结合,为食品、药品的实时和现场自我检测提供了新的思路和手段,该方法不仅成本低廉、易于操作,且检测精度高。 相似文献
8.
目的建立同时测定食品包装材料中32种挥发性有机化合物(VOCs)的气相色谱-质谱检测方法。方法设定平衡温度和时间分别为100℃和30 min,色谱柱为HP-VOC,载气为氦气,流速为2.0 mL/min,不分流进样,进样口温度为250℃,柱温为程序升温。质谱采用电子轰击电离方式,电子轰击能为70 eV,定性分析采用SIM模式,定量分析采用外标法。结果方法检出限在0.01~0.17 mg/m^2的范围内,相关系数>0.99,样品加标回收率为90.3%~109.9%,相对标准偏差为1.1%~8.9%(n=6)。结论该方法适用于食品包装材料中挥发性有机化合物的测试。 相似文献
9.
Valeria Guazzotti Barbara Giussani Luciano Piergiovanni Sara Limbo 《Packaging Technology and Science》2015,28(5):385-395
An analytical survey of 20 paper and board (P&B) materials intended for food use was carried out with the aim to identify chemicals with a potential to migrate into foods. Representative materials covering a range of uses (primary and secondary packaging and article for take away foods) were obtained from distributors. A screening approach was applied by means of solvent extraction with subsequent analysis by gas chromatography/mass spectrometry. A large number of analytes were detected, and a chemometric approach was used to explore the data. Principal component analysis was used to identify and select some compounds as markers for sample classification. In the corrugated and printed packaging, it is worth emphasizing the presence of residual solvents, probably coming from printing inks, as well as hydrocarbons and aromatic compounds, mainly toluene and plasticizers linked also to the recycled pulp content such as diisobutyl phthalate or diisopropylnaphthalenes, whereas in the plastic‐laminated samples, triacetin was identified as the prevailing compound. A literature search for safety data or legislative restrictions of the identified substances was performed. Additionally, the semi‐quantification of the compounds in the packaging allowed a worst case estimation of food contamination by means of the infinite total migration model; occasionally, migration estimations overcame the specific migration limits. The chosen analytical methods coupled with a chemometric approach proved to be an effective way to describe the data; it may be concluded that only the simultaneous consideration of several chemicals with a multivariate approach allowed the investigated packaging materials to be distinguished. Copyright © 2014 John Wiley & Sons, Ltd. 相似文献
10.
目的 针对食品内层包装纸的缺陷特征,对机器视觉识别系统的照明光源进行优化,以提高内层包装缺陷的识别率,减少缺陷包装量。方法 基于计算机视觉识别技术,通过斑点检测不同光源下内层包装纸的常见缺陷特征,分别采用Matlab的三维绘图、相关性分析的方法,依次确定照明光源类型、形状和角度,并进行应用验证。结果 红外光源为纸铝复合内层包装纸缺陷特征识别的最适光源类型;条形光源与内层包装纸呈极显著相关,缺陷识别率达96.95%;60°的高角度照明位置与内层包装纸呈显著相关,缺陷识别率达96.96%。红外条形光源高角度照明,缺陷识别率达99%。结论 将红外条形光源高角度照明应用于纸铝复合内层包装纸的在线检测,与LED环形光源相比,其缺陷特征视觉识别率提高了0.51个百分点。 相似文献
11.
12.
目的利用气相色谱串联质谱联用仪(GC-MS/MS)建立食品包装纸中24种有害物质(17种邻苯二甲酸酯(PAEs)和7种多氯联苯(PCBs))同时测定的方法。方法样品处理后准确加入30 mL异丙醇和内标溶液,超声萃取40min,使用气相色谱串联质谱仪进行检测,并采用内标法定量。结果在0.02~1.0μg/mL范围内,24种化合物的拟合曲线线性良好,相关系数R2在0.9945~1.0000之间,方法检出限和定量限分别为0.0005~0.0028 mg/L和0.0016~0.0089 mg/L,6种不同品牌的食品包装纸种的最高残留量为26.53 mg/kg。对24种化合物进行低、中、高3个水平浓度的加标回收试验,发现平均回收率在85.6%~109.7%之间,日内和日间的相对标准偏差分别小于6%(n=5)和9%(n=3),回收率、重复性及精密度良好。结论该方法简便、快速、结果准确可靠,适用于同时测定食品包装纸中24种有害物质,是一种高通量测试方法。 相似文献
13.
M. Lewander P. Lundin T. Svensson S. Svanberg A. Olsson 《Packaging Technology and Science》2011,24(5):271-280
The increase in chilled food consumption requires enhanced food safety and quality assurance. Food deteriorating processes are affected by the presence of oxygen, combined with factors such as time and temperature. To slow down deterioration processes and prolong shelf life, traditional packaging methods are being replaced by modified atmosphere packaging, for example. Oxygen, which is naturally present in the headspace of most food packages, is then reduced and controlled. Many sensing techniques for food quality assurance have been developed; however, almost all are intrusive, increasing the complication level and causing sample waste. The purpose of this paper is to introduce a non‐intrusive technique [gas in scattering media absorption spectroscopy (GASMAS)] for measuring gas composition in the headspace of liquid food packages. The GASMAS method uses diode laser absorption spectroscopy combined with diffuse light propagation to analyse gas located inside solids and liquids. By illuminating the package from the outside and analysing the scattered light that emerges, the absorption from the gas inside the headspace can be studied.The GASMAS technique was evaluated on a series of carton packages with a high‐quality orange juice and a nitrogen headspace. A clear variation in oxygen content was measured for samples with different storage times. The results demonstrate the possibility of using the GASMAS method for non‐intrusive quality measurements in food products and packaging. They also indicate the potential for the non‐intrusive quality assurance applications without waste of samples. A further development of the technique could include ‘in‐line’ quality control of packed food items throughout the food packaging supply chain. Copyright © 2011 John Wiley & Sons, Ltd. 相似文献
14.
目的归纳目前国内外纸质食品包装材料防水防油改性的研究进展,分析不足之处,并指出未来的发展方向。方法总结常用的纸质食品包装用防水剂(烷基烯酮二聚体、纳米复合材料、聚硅氧烷等)和防油剂(壳聚糖、淀粉类等)的研究现状,包括各类防水剂、防油剂的基本特性、应用效果和发展前景。结果目前,虽然很多新型的纸质食品包装用防水防油助剂和新材料被研发并应用,但仍存在一些局限性,如部分防水防油剂的安全环保性能有待改进、防水防油综合改性的研究不多、研究成果的实际应用转化率不高、纸质防水防油包装的综合包装效果和改性处理方法还可进一步提升和丰富等,因此,针对上述问题进行深入研究,对未来纸质包装材料在食品包装行业的发展有重要意义。结论市场和消费者对纸质食品包装的需求量较大,纸质食品包装防水防油改性的研究将会有较大的发展空间和应用价值。 相似文献
15.
利用气相色谱-质谱联用技术(GC-MS),对市面上常用纸质包装材料进行包装的食品——米粉、大米、脱脂奶粉、白砂糖,以及目前研究常用的、价格昂贵的食品模拟物Porapak的热稳定性与对各种模拟污染物的吸收性能进行了分析,以寻求代替Porapak用于分析纸质食品包装材料迁移测试的最佳食品模拟物。研究结果表明,在100℃时,出现了大米熟化、白砂糖热分解、脱脂奶粉焦化的现象,与其他食品相比,米粉的热稳定性最好;对75℃时各食品(模拟物)对模拟污染物的吸收性能依次为:Porapak米粉脱脂奶粉白砂糖大米,米粉与Porapak的吸收性能最接近,可以利用米粉代替Porapak,作为食品模拟物进行迁移测试实验。 相似文献
16.
The process of the transfer of a contaminant through a package made of a recycled film in good contact with a virgin film playing the role of a functional barrier is studied. The two films being made of the same polymer, the contaminant diffuses within the two layers of polymer with the same constant diffusivity. Convective transfer of the contaminant takes place through the surface of the functional layer in contact with the food, while the other external surface is impermeable to it. The effect of the coefficient of mass transfer at the packaging-food interface on the rate of transfer of the contaminant to the food is especially studied. Dimensionless numbers are used, making the results general. 相似文献
17.
18.
目的模拟苯酚(Phenol)、2,6-二异丙基萘(2,6-DIPNs)及邻苯二甲酸二丁酯(DBP)等3种有机污染物穿过纸张向所包装食品迁移的过程,同时测定以上3种有机污染物在纸张与空气之间的分配系数(Kp,a)。方法根据纸张具有孔隙结构的特点,引进线性阻滞系数(Rm)的概念对菲克第二定律(Fick′s law)进行修正,将修正后的迁移方程解与迁移实验结果进行对比,得到有机污染物在纸质包装材料中的扩散系数(Dp)值。结果在75℃与100℃的条件下,Dp值的数量级介于10-5~10-4之间,与已有的研究结果相符合。结论与Dp一样,Rm也是描述纸质包装材料中有机污染物迁移性能的重要参数之一。 相似文献
19.
以HP-INNOWax(30m×0.25mm×0.25μm)毛细管柱为分离柱,气相色谱/质谱(GC/MS)分析中国乌龙茶“白芽奇兰”的香气成分,结果表明,“白芽奇兰”茶的香气主成分为:氧化里哪醇,α-萜品醇、里哪醇、己酸、苯甲醇、苯己醇、苯乙腈、巴他酸-3-乙烯酯、橙花醇、橙花叔醇、苏合香烯及4-王酮等。 相似文献