| Influence of sample weight on black iodine absorption determination |
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| DOI： |
| Key Words: sample weight；carbon black；iodine absorption；absorption equilibrium |
| Author Name | Affiliation | | WANG Dingyou | Research and Design Institute of Carbon Black Industry |
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| Abstract: |
| Taking N220 black，N330 black and semi-reinforcing furnace black as examples，the influence of the sample weight on the iodine absorption determination for carbon black was investigated based on the absorption theory. The results showed that a whole single molecular layer absorption of iodine on black surface in the equilibrium solution could not be completely insured because there were some shortcomings on the sample weight in the existent national standard GB/T 370.1—1998 and the relevant international standard resulting in the significant variation of the iodine absorption determination for some types of blacks with the sample weight，and the impossibility of reporting the result. A new system classification of sample weights was proposed to solve the above problem. |
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