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怎么检测纸杯中含有的荧光增白剂含量


网址:http://www.scvc8.com  时间:2019-04-19 17:16:19

  6个一次性纸杯(2个从大型超市买的品牌纸杯、1个定制纸杯,2个从小商品批发市场买的杂牌纸杯,1个从街边小店买的杂牌纸杯)、紫外分析仪。
  Six disposable cups (2 brand cups bought from supermarkets, 1 custom cup, 2 miscellaneous cups bought from small commodity wholesale markets, 1 miscellaneous cup bought from street stores), ultraviolet analyzer.
  实验步骤
  Experimental steps
  1.将购买的6个纸杯送于济南市产品质量监督检验所检测。(该所是国家质量技术监督行政部门依法设立的具有第三方公正性地位的综合性产品质量监督检验机构,也是山东省内唯一食品用纸包装、容器等制品生产许可证发证检验机构。)
  1. Six paper cups purchased were sent to Jinan Quality Supervision and Inspection Institute for testing. This Institute is a comprehensive product quality supervision and inspection institution established by the national quality and technical supervision administrative department in accordance with the law, which has the third-party impartiality status. It is also the only production license issuing and inspection institution for food paper packaging, containers and other products in Shandong Province. )
  2.在济南市产品质量监督检验所恒温恒湿的物理实验室内,工作人员使用紫外分析仪逐一照射6个纸杯样品。
  2. In the Physical Laboratory of constant temperature and humidity of Jinan Institute of Product Quality Supervision and Inspection, staff irradiated six cup samples one by one with ultraviolet analyzer.
  3.工作人员把6个纸杯样品的油墨图案(印有花纹)朝上,放入三用紫外分析仪中,打开254nm、365nm(能观测荧光的波段)两个开关,图案发亮,呈荧光绿。
  3. The staff put the ink pattern (printed pattern) of six paper cup samples upward into the three-purpose ultraviolet analyzer, and opened 254 and 365 nm (fluorescence band) switches. The pattern was bright and fluorescent green.
  实验结论
  empirical conclusion
  6个纸杯样品均检测出了荧光增白剂,但是3个从正规超市买到的纸杯,荧光增白剂并不超标,而另3个纸杯荧光增白剂含量不合格,其中从街边小店买的超标最多。据悉,荧光增白剂的检测依据是国标GB/T5009.78-2003《食品包装用原纸卫生标准的分析方法》的相关规定,即100cm2的试样,置于波长365nm和254nm紫外灯下检测,最大荧光面积均应不大于5cm2。
  The fluorescent brighteners were detected in all 6 cup samples, but the fluorescent brighteners in 3 cups bought from regular supermarkets did not exceed the standard, while the fluorescent brighteners in the other 3 cups were not up to standard, among which the most were bought from street stores. It is reported that the fluorescent whitening agent is based on the relevant provisions of GB/T5009.78-2003 "Hygienic Standard Analysis Method for Food Packaging Base Paper". Samples of 100cm2 should be tested under 365nm and 254nm ultraviolet lamp, and the maximum fluorescent area should be no more than 5cm2.
  荧光增白剂OB适用塑料及其他的应用范围较广,且相融性较OB-1好,在PP中可以多与OB-1的用量而不析出。可用于热塑性塑料、聚氯乙烯、聚苯乙烯、聚乙烯、聚丙烯、ABS、醋酸纤维、油漆、涂料、印刷油漆等的增白,增白剂 OB用于各加工阶段中的聚合物增白,可赋予加工品明亮蓝白色光泽。
  Fluorescent whitening agent OB is suitable for plastics and other applications, and its compatibility is better than OB-1. In PP, it can be used more with OB-1 without precipitation. It can be used for whitening thermoplastics, polyvinyl chloride, polystyrene, polyethylene, polypropylene, ABS, acetic acid fibers, paints, coatings, printing paints, etc. The whitening agent OB is used for whitening polymers in various processing stages and can give bright blue-white luster to processed products.
  荧光增白剂OB—1是优良的恶唑类增白剂,不溶于水,性能稳定,具有良好的耐热、耐晒、耐氯漂和耐迁移等性能。荧光增白剂OB—1特别耐高温,主要用于热熔轧染法增白,适用于涤纶纤维的增白及涤纶与棉和其它纤维混纺织物的增白。该产品还可用于ABS、PS、HIPS、PA、PC、PP、EVA和硬质PVC等塑料增白,锦纶纤维、尼龙和聚酯中添加OB—1后也会明显提高白度。在回收的聚酯纤维废料、瓶料和切片中加入OB—1后回收料会显得更白,而且不同回收料中色度会变得更加一致。
                   荧光增白剂厂家
  Fluorescent whitening agent OB-1 is an excellent oxazole whitening agent, insoluble in water, stable performance, good heat resistance, sun resistance, chlorine bleaching resistance and migration resistance. Fluorescent whitening agent OB-1 is especially high temperature resistant. It is mainly used for hot melt pad dyeing whitening. It is suitable for whitening polyester fibers and blended fabrics of polyester, cotton and other fibers. The product can also be used to whiten ABS, PS, HIPS, PA, PC, PP, EVA and rigid PVC. The whiteness of polyamide fibers, nylon and polyester can be obviously improved by adding OB-1. When OB-1 is added to the recycled polyester fiber waste, bottles and chips, the recycled material will appear whiter and the chroma of different recycled materials will become more consistent.
  在很多行业中OB和OB-1可以混用,一是可以增加蓝白光的比重,二是可以避免因放置时间长导致增白剂析出,如增白色母粒的生产基本都是两者混用,比例大约为1:3.两者孰优孰劣要看具体的应用行业,更为环保的是OB,现在越来越多的行业会尝试使用它,但是荧光强度不高,耐温度会受到限制,用于再生料作用不太明显,这样一来,OB-1显示了它的不可替代性。
  In many industries, OB and OB-1 can be mixed. One is to increase the proportion of blue and white light, the other is to avoid the precipitation of whitening agent due to long time of storage. For example, the production of whitening masterbatch is basically a mixture of the two, the ratio is about 1:3. The advantages and disadvantages of the two depend on the specific application industry, and the more environmentally friendly is OB. Now more and more industries will try to use it, but the fluorescence is strong. Low degree, temperature resistance will be limited, the role of recycled materials is not obvious, so OB-1 shows its irreplaceability.

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