In accordance with the EU (European Union) directives on Restriction of Hazardous Substances in Electrical and Electronic Equipment (RoHS), from July of 2006, electrical products exported to Europe must not contain any of the specified hazardous metals, namely, cadmium, lead, mercury, and hexavalent chromium, or the specified hazardous substances, namely, polybrominated biphenyl (PBB) and polybrominated diphenyl ether (PBDE). The use of parts and materials free of hazardous substances, as exemplified by green procurement, has become an important issue in commercial transactions. There are corporations that have established their own criteria and demand analysis reports from suppliers of materials such as plastic and resin parts used in electrical and electronic equipment.
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Hazardous metal/substances |
Prescribed PoHS limits |
Recommended instruments
for inspection |
|
|
High precision analysis |
Screening |
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| Cd, Pb, Hg | Cd: 100ppm Pb, Hg: 1,000ppm |
AAS ICP |
EDX |
| Hexavalent Chromium(Cr6+) |
1,000ppm | (For analysis
of total chromium) AAS ICP UV-VIS |
(For selective analysis
of Cr6+) UV-VIS |
| (For analysis of total
chromium) EDX |
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| Brominated flame retardants (PBB, PBDE) |
1,000ppm | GCMS | (For selective analysis) FTIR |
| (For analysis of total
bromine) EDX |
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The constituents of brominated flame retardants are separated with a gas chromatograph and detected with a mass spectrometer. This makes it possible to analyze brominated flame retardants with a high degree of precision. In order to ensure high accuracy, samples must be treated beforehand to remove resins or other substances that may obstruct analysis.
Simple method
| DI-MS | : | Direct injection method. | |
| EGA-MS | : | Evolved Gas Analysis method by Pyrolysis system(PY-2020iD). |
Highly sensitive method
| PYR-GCMS | : | Thermal decomposition method by Pyrolysis system (PY-2020iD). |
Highly sensitive and precise method
| Solvent extraction method |
Analysis of Brominated Flame Retardantsby GC/MS (PDF 54KB)
Analysis of Brominated Flame Retardants by Evolved Gas Analysis Method