RoHS certification is the abbreviation of "The restriction of the use of certain hazardous substances in electrical and electronic equipment", its provisions, in electrical and electronic products, which contain lead, cadmium, mercury, hexavalent chromium, and polybrominated diphenyl ethers polybrominated biphenyls and other harmful heavy metals, the EU from July 1, 2006 will be a ban on imports.

Heavy metals - mercury:

RoHS limit is: 1000PPM

Testing standards: US EPA3052

Methods:

a, the sample was cut into pieces into a microwave digestion flask, add nitric acid and hydrofluoric acid

b, microwave digestion reaction flask into a microwave digester until complete dissolution

c, the solution was filtered, the filtrate was deionized water constant. Then to inductively coupled plasma atomic emission spectrometer detection.