| YU Zhigang,RAABE Thomas,HEMKEN Gitta,BROCKMANN Uwe. 2004. Continuous flow analysis of dissolved total phosphorus in seawater by UV-K2S2O8 online digestion method. Acta Oceanologica Sinica, (4):637－645 |
| Continuous flow analysis of dissolved total phosphorus in seawater by UV-K2S2O8 online digestion method |
| Continuous flow analysis of dissolved total phosphorus in seawater by UV-K2S2O8 online digestion method |
| Received:March 01, 2004 Revised:October 28, 2004 |
| DOI： |
| Key words:dissolved total phosphorus organic phosphorus ultraviolt persulfate potassium continuous flow analysis |
| 中文关键词: dissolved total phosphorus organic phosphorus ultraviolt persulfate potassium continuous flow analysis |
| 基金项目: |
| Author Name | Affiliation | E-mail | | YU Zhigang | College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266003, China | zhigangyu@mail.ouc.edu.cn | | RAABE Thomas | Institute of Biogeochemistry and Marine Chemistry, Hamburg University, Hamburg D 20146, Germany | | | HEMKEN Gitta | Institute of Biogeochemistry and Marine Chemistry, Hamburg University, Hamburg D 20146, Germany | | | BROCKMANN Uwe | Institute of Biogeochemistry and Marine Chemistry, Hamburg University, Hamburg D 20146, Germany | |
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| Abstract: |
| Several methods for analysis of dissolved total phosphorus in seawater were reviewed.Discussions were focused on UV irradiation and persulphate oxidation methods which are the most popular dissolved organic phosphorus determination methods presently.The compounds used for the phosphorus recovery test were categorized into three groups according to their chemical structure.It was found that low power UV irradiation can decompose P-O-C or P-C bonds efficiently but may be inefficient for P-O-P bonds.Heating-bath in acid condition is useful for decomposing P-O-P bonds.Using the continuous flow analysis system (Auto-analyzer Ⅱ),UV digestion and heating-bath,series experiments were carried out based on the above analysis.Eleven model compounds were employed for the phosphorus recovery test and the factors influencing the decomposition efficiency of dissolved compounds containing phosphorus were clarified.Finally,the optimal design for determination of dissolved total phosphorus in seawater based on the routine continuous flow analysis system was presented.For the organic mono-phosphate,the recovery is more than 90% and a recovery of 33%~51% was obtained for inorganic or organic polyphosphates.Up to now,this is the highest decomposition efficiency for dissolved phosphorus based on the continuous flow analysis system. |
| 中文摘要: |
| Several methods for analysis of dissolved total phosphorus in seawater were reviewed.Discussions were focused on UV irradiation and persulphate oxidation methods which are the most popular dissolved organic phosphorus determination methods presently.The compounds used for the phosphorus recovery test were categorized into three groups according to their chemical structure.It was found that low power UV irradiation can decompose P-O-C or P-C bonds efficiently but may be inefficient for P-O-P bonds.Heating-bath in acid condition is useful for decomposing P-O-P bonds.Using the continuous flow analysis system (Auto-analyzer Ⅱ),UV digestion and heating-bath,series experiments were carried out based on the above analysis.Eleven model compounds were employed for the phosphorus recovery test and the factors influencing the decomposition efficiency of dissolved compounds containing phosphorus were clarified.Finally,the optimal design for determination of dissolved total phosphorus in seawater based on the routine continuous flow analysis system was presented.For the organic mono-phosphate,the recovery is more than 90% and a recovery of 33%~51% was obtained for inorganic or organic polyphosphates.Up to now,this is the highest decomposition efficiency for dissolved phosphorus based on the continuous flow analysis system. |
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