| 摘要: |
|
| 关键词: |
| DOI： |
| 分类号: |
| 基金项目: |
|
| SEQUENTIAL DETERMINATION OF ORGANIC C AND INORGANIC C IN MARINE SEDIMENTS BY PERSULFATE-NONAQUEOUS TITRATIONS |
|
|
| Abstract: |
| This paper presents the titrimetry of persulfate-nonaqueous solution with sequential determination of the organic and the inorganic C contents in marine sediments. In a particularly designed paired-ball reactor, the inorganic and organic C contents of a sample was determined separately, yet simultaneously. The carbonates need not be separated beforehand. The Ag2SO4 was used as a catalyst and the time of oxidization was shortened considerably. The optimal conditions have been found. That is, the carbonates of samples are reactivated initially with 3M H3PO4, the inorganic C content is obtained, and then the K2S2O8 (oxidizer) and Ag2SO4 added to the reactor. The reactionary temperature is controlled within 120-130℃ and the organic C content is determined. This method, which is more accurate, simple and rapid, has been successfully applied to the analysis of samples of Oceanic sediments with excellent precision of less than ±0.02%. |
| Key words: |
