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Continuous flow analysis of dissolved total phosphorus in seawater by UV-K2S2O8 online digestion method
作者姓名:YU Zhigang  RAABE Thomas  HEMKEN Gitt  BROCKMANN Uwe
作者单位:[1]CollegeofChemistryandChemicalEngineering,OceanUniversityofChina,Qingdao266003,China [2]InstituteofBiogeochemistryandMarineChemistry,HamburgUniversity,HamburgD20146,Germany
基金项目:国家重点基础研究发展计划(973计划),the Key Science and Technology Plan of the Ministry of Education of China under contract,the Joint Sino German Project under contract
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.

关 键 词:液化磷  连续流体  有机磷  过硫酸钾  海洋环境
收稿时间:3/1/2004 12:00:00 AM
修稿时间:2004/10/28 0:00:00

Continuous flow analysis of dissolved total phosphorus in seawater by UV-K2S2O8 online digestion method
YU Zhigang,RAABE Thomas,HEMKEN Gitt,BROCKMANN Uwe.Continuous flow analysis of dissolved total phosphorus in seawater by UV-K2S2O8 online digestion method[J].Acta Oceanologica Sinica,2004,23(4):637-645.
Authors:YU Zhigang  RAABE Thomas  HEMKEN Gitta and BROCKMANN Uwe
Institution:1.College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266003, China2.Institute of Biogeochemistry and Marine Chemistry, Hamburg University, Hamburg D 20146, Germany
Abstract:Several methods for analysis of dissolved total phosphorus in seawater were reviewed. Discussions were focused on UVirradiation and persulphate oxidation methods which are the most popular dissolved organic phosphorus determinationmethods presently. The compounds used for the phosphorus recovery test were categorized into three groups accordingto their chemical structure. It was found that low power UV irradiation can decompose POC or PC bonds efficientlybut may be inefficient for POP bonds. Heating-bath in acid condition is useful for decomposing POP bonds. Usingthe continuous flow analysis system (Auto-analyzer II), UV digestion and heating-bath, series experiments were carriedout based on the above analysis. Eleven model compounds were employed for the phosphorus recovery test and thefactors 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 flowanalysis system was presented. For the organic mono-phosphate, the recovery is more than 90% and a recovery of33%~51% was obtained for inorganic or organic polyphosphates. Up to now, this is the highest decompositionefficiency for dissolved phosphorus based on the continuous flow analysis system.
Keywords:dissolved total phosphorus  organic phosphorus  ultraviolt  persulfate potassium  continuous flow analysis
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