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| Spectrophotometry Determination of Zinc Content in Paper |
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| DOI：10.11981/j.issn.1000-6842.2011.04.21 |
| Key Words:paper and paperboard； zinc； spectrophotometry |
| Fund Project:国家“973计划项目”（2010CB732206）；广东省产学研项目（2010B090400031）；粤港关键领域重点突破项目（200849834）。 |
| Author Name | Affiliation | | 吴严亮 | 华南理工大学制浆造纸工程国家重点实验室,广东广州,510640 | | 陈 港 | 华南理工大学制浆造纸工程国家重点实验室,广东广州,510640 |
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| Abstract: |
| Dissolving the paper or paperboard by concentrated sulfuric acid and hydrogen peroxide solution and then the zinc content was determined by ultraviolet-visible spectrophotometry based on the color reaction between zinc ion and zincon. The results showed that the zinc content and the absorbance at 620 nm showed a good linear relationship when the pH value is 8.9 and the zincon volume is 5 mL, and the linear correlation coefficient is 0.9991. The detection limit is 0.0720 mg/L and the standard addition recoveries are 94.9%～104.6%. The zinc content in a vulcanized paper sample determined by this method is well in accord with that determined by other methods. Hence, this method can be used to determine the zinc content in paper quantitatively. |
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