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荧光增白剂的几种检测方法


网址:http://www.jilinghuagong.com  时间:2019-04-01 14:58:19

  荧光增白剂检测方法,比较后一种超实用
  Fluorescent whitening agent detection method, the last super practical
  一般的商品,外观确实可以反映其品质,但是荧光增白剂的质量却很难靠肉眼分辨。那么有没有办法检测荧光增白剂的质量呢?下面就给大家讲一讲检测的5种方法,每种方法有自己的局限性,大家可以根据自己的实际需求来进行选用。
  Generally speaking, the appearance of commodities can really reflect their quality, but the quality of fluorescent whitening agent is difficult to distinguish by naked eyes. So is there any way to test the quality of fluorescent whitening agent? Here we will talk about five methods of detection, each method has its own limitations, you can choose according to their actual needs.
  一、紫外灯法
  I. Ultraviolet Lamp Method
  荧光增白剂的增白原理是将肉眼看不见的紫外线转化为蓝光,从而使物体增白增亮,所以就可以采用紫外灯直接照射来确定是否含有荧光增白剂。淘宝上就有卖这种手电筒的,可以照射物体来判断是否含有荧光增白剂。
  The whitening principle of fluorescent whitening agent is to convert the invisible ultraviolet light into blue light, so that the object can be whitened and brightened. Therefore, the ultraviolet lamp can be directly irradiated to determine whether there is a fluorescent whitening agent. Taobao sells this kind of flashlight, which can illuminate the object to determine whether it contains fluorescent whitening agent.
  荧光剂
  Fluorescent agent
  局限性:紫外灯法只能测定有无问题,不能确定含量问题。
  Limitations: Ultraviolet lamp method can only determine whether there is a problem, can not determine the content of the problem.
  二、紫外分光光度法
  II. Ultraviolet Spectrophotometry
  根据不同的荧光增白剂选取不同的溶剂,由于荧光增白剂有吸收紫外光的能力,所以通过测定其吸收的光量,同标准曲线比较确定荧光增白剂的含量。这也是国标中测定方法。
  Different solvents are selected according to different fluorescent whitening agents. Because fluorescent whitening agents have the ability to absorb ultraviolet light, the content of fluorescent whitening agents is determined by measuring the amount of light they absorb and comparing with the standard curve. This is also the determination method in the national standard.
  紫外可见分光光度计
  Ultraviolet-Visible Spectrophotometer
  局限性:紫外分光光度法能确定含量的问题,却不能确定具体的型号。此方法设备比较便宜,操作简单是一般企业所采用的方式,只要知道所采购或者生产的荧光增白剂具体型号,那么就可以确定荧光增白剂的量,也就知道了此批次荧光增白剂的纯度。
  Limitations: Ultraviolet spectrophotometry can determine the content of the problem, but can not determine the specific model. This method is cheap and easy to operate. As long as the specific type of fluorescent whitening agent purchased or produced is known, the quantity of fluorescent whitening agent can be determined, and the purity of this batch of fluorescent whitening agent can be known.
  三、分子荧光分光光度法
  3. Molecular fluorescence spectrophotometry
  根据测量物质反射的光强和波长来确定含有的荧光增白剂的型号和剂量,此方法可以确定所含荧光增白剂的量和型号。
  The type and dosage of the fluorescent whitening agent can be determined by measuring the reflected light intensity and wavelength of the substance. The quantity and type of the fluorescent whitening agent can be determined by this method.
  荧光分光光度计
  Fluorescence spectrophotometer
  这种方法需要对荧光增白剂进行分离,即需要将荧光增白剂从产品上分离下进行测定,对于检测原材料所使用的荧光增白剂种类是比较好的一种方法。
  This method needs to separate the fluorescent whitening agent, that is, to separate the fluorescent whitening agent from the product and determine it. It is a better method to detect the kinds of fluorescent whitening agent used in raw materials.
  四、液相色谱法
  IV. High Performance Liquid Chromatography
  液相色谱法通过将进样溶液经色谱分离后,利用紫外检测器或荧光检测器,根据保留时间和色谱峰面积进行定量测定。
  High performance liquid chromatography (HPLC) uses ultraviolet detector or fluorescence detector to quantitatively determine the retention time and chromatographic peak area of the sample solution after chromatographic separation.
  局限性:液相色谱法能对特定的荧光增白剂进行准确定量,但该法检测成本较高,且根据化合物的保留时间和光谱定性易受杂质干扰,因此对不同种类荧光增白剂的定性判定有一定局限性。
  Limitations: High performance liquid chromatography (HPLC) can accurately quantify specific fluorescent whitening agents, but the cost of this method is high, and the qualitative determination of fluorescent whitening agents is easily disturbed by impurities according to the retention time and spectrum of the compounds, so the qualitative determination of different kinds of fluorescent whitening agents has certain limitations.
  五、液相色谱-质谱联用法
  V. High Performance Liquid Chromatography-Mass Spectrometry
  液相色谱与质谱联用法能实现荧光增白剂的良好分离和准确测定,其采用保留时间与特征离子对比例对已知目标物进行定性和定量分析,因此准确性和灵敏度更高。
  High performance liquid chromatography coupled with mass spectrometry can achieve good separation and accurate determination of fluorescent whitening agent. The retention time and characteristic ion ratio are used for qualitative and quantitative analysis of known target substances, so the accuracy and sensitivity are higher.
  液相色谱仪
  High performance liquid chromatography
  局限性:因其仪器设备成本较高,不利于企业生产的检测和监控,在实际应用上有一定局限性。
                             荧光增白剂厂家
  Limitations: Because of its high cost of instruments and equipment, it is not conducive to the detection and monitoring of enterprise production, and has certain limitations in practical application.
  根据不同检测要求,测定有无可以用1紫外灯法,测定已知型号的量可以用2紫外分光光度法,确定是哪种荧光增白剂以及量的多少可以采用3分子荧光分光光度法,4,5两种方法的精度更高,设备昂贵并不适合一般的企业使用。
  According to different detection requirements, 1-ultraviolet lamp method can be used to determine whether there is a one-ultraviolet lamp method, 2-ultraviolet spectrophotometry can be used to determine which fluorescent whitening agent and the amount can be determined by 3-molecule fluorescence spectrophotometry. 4-5 method has higher accuracy and expensive equipment is not suitable for general enterprises.

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