Detection method and principle of RoHS Hexavalent chromium in electronic products

Date：2023-06-16 14:48:35Views：368

RoHS refers to the Restriction of the Use of Certain Hazardous Substances in Electronic and Electrical Equipment issued by the European Commission in 2003. The directive requires the restriction of the use of certain hazardous substances, including Hexavalent chromium, in electronic and electrical equipment sold on the European market.

Hexavalent chromium is a harmful substance, which may cause damage to human nervous system, skin and respiratory tract. In electronic products, Hexavalent chromium may exist in coatings, coatings, printing inks, adhesives and other materials. Therefore, it is very important to detect the content of Hexavalent chromium in electronic products.

In order to ensure that electronic products do not contain Hexavalent chromium, they need to be tested. There are currently two commonly used detection methods: ion chromatography and X-ray fluorescence spectroscopy.

Ion chromatography is to separate the ions in the tested object by using a variety of ion Mode of action such as ion Exchange interaction, ion pair exclusion and reverse phase action, and then detect them by using detection methods such as ultraviolet visible spectrophotometry or fluorescence spectrometry, so as to determine whether the sample contains Hexavalent chromium.

X-ray fluorescence spectroscopy is a method of intrinsic detection that utilizes the characteristic spectra of X-rays that occur in the sample. In the sample, the X-ray will make the atoms in the sample emit fluorescence. By analyzing the emission spectrum, we can determine whether there is Hexavalent chromium in it.

These two methods each have their own advantages and disadvantages. Ion chromatography requires a relatively long sample preparation time, but can detect lower concentrations. X-ray fluorescence spectroscopy is simple to operate, but requires special equipment and professional personnel for operation.

Regardless of the method used, it is necessary to ensure the accuracy and repeatability of the detection. In addition, in the detection of Hexavalent chromium, it is also necessary to pay attention to the skills and key points of sample selection, sample preparation, sample preservation and treatment.

It is very important to detect Hexavalent chromium in electronic products, which is of great significance to protect human health and environmental protection. Various manufacturing and production enterprises should actively take measures to ensure that their products comply with relevant testing standards and strive to pass relevant certifications. The above is the electronic product testing related content organized by the Chuangxin Testing editor, hoping to be helpful to you. Chuangxin Testing is a professional testing institution for electronic components. Currently, it mainly provides integrated circuit testing services such as capacitors, resistors, connectors, MCU, CPLD, FPGA, DSP, etc. Specializing in functional testing of electronic components, appearance testing of incoming electronic components, anatomical testing of electronic components, acetone testing, X-ray scanning testing of electronic components, and ROHS composition analysis testing. Welcome to call, we will be happy to serve you!