RoHS (“Restriction on Hazardous Substances“) has been an EU Directive that regulates the amount of various toxic substances in electric appliances and electronic devices since the 1st of July, 2006. The RoHS directive affects the following substances: lead, cadmium, chrome VI, mercury, polybrominated biphenyls and polybrominated diphenyl ethers that may only occur in certain concentrations.
Although the RoHS directive affects various electric and electronic devices, the given limits only apply for the single homogenous materials. For example, this means that for a headset, all physically divisible parts have to be analysed separately. Basically, the goal of the RoHS directive is to make supply firms compile certificates of the materials (e.g. unloaded boards, plump, plugs, pins, cords, casings, plastic parts etc.) which are then received by the final producer.
RoHS conformity is in particular interesting for the following devises
- Large household appliances
- Small household appliances
- IT- and telecommunication devices
- Consumer electronics goods
- Lamps and lighting
- Electrical and electronical tools (with the
exception of large-scale stationary industrial tools)
- Toys, leisure and sports equipment
- Automatic dispensers
X-ray fluorescence analysis is the recommended treatment for validating RoHS conformity
In DIN IEC 62321-3-1, the International Electrotechnical Commission recommends the X-ray fluorescence analysis as a particularly suitable treatment for the control of determined maximum concentrations.
Useful links dealing with the RoHS directive and further explanations: