GB/T 27630-2011 was publicised and implemented in 2001. Given the limited binding effect from GB/T standard to auto manufacturers, the standard is intended to be changed as a mandatory one. The setting of some pollutants in passenger cars is loose compared with that required in international standards as it was based on the industrial level at that time. The great improvement of Chinese industry gives rise to stringer standards.
Combined with various opinions, the guideline therefore determines 8 major substances to be under control and provides for the concentrations for benzene, toluene, xylene, ethylbenzene, styrene, formaldehyde, acetaldehyde and acraldehyde. See the following table for more details:
|Substance||Original Limit (mg/m3)||Altered Limit (mg/m3)||Reference|
|Formaldehyde||0.10||0.10||Remain unchanged (with WTO standards as reference)|
|Acetaldehyde||0.05||0.20||Determined based on international standards|
The other important work for this amendment is to research into the feasibility and necessity of PAHs limit. However, it is not included in the standard given the limitation of source, physical properties and test method on PAHs. Besides, the TVOC-health relation is still not clear, which require more research. The standard is only applicable to automobiles that newly manufactured.
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