Simultaneous determination of PIP and POP in seawater

Li Ning; Li Xuegang; Song Jinming

doi:10.1007/BF02842585

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Simultaneous determination of PIP and POP in seawater

Updated：2023-05-16

- Simultaneous determination of PIP and POP in seawater
- Journal of Oceanology and Limnology Vol. 22, Issue 2, Pages: 146-149(2004)
- Affiliations：
  
  1. Institute of Oceanology Chinese Academy of Sciences
  2. Graduate School Chinese Academy of Sciences
- Author bio：
- Funds：
- DOI：10.1007/BF02842585
  CLC：
- Published：2004
- Accepted：
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Ning, L., Xuegang, L. & Jinming, S. Simultaneous determination of PIP and POP in seawater., Chin. J. Ocean. Limnol. 22, 146–149 (2004). https://doi.org/10.1007/BF02842585
DOI：

Ning, L., Xuegang, L. & Jinming, S. Simultaneous determination of PIP and POP in seawater., Chin. J. Ocean. Limnol. 22, 146–149 (2004). https://doi.org/10.1007/BF02842585 DOI：

摘要

Abstract

A method for simultaneous determination of particulate inorganic phosphorus (PIP) and particulate organic phosphorus (POP) in seawater was improved. After using cellulose acetate membrane to filter the seawater samples and washing the membrane with 1mol/L hydrochloric acid

PIP was extracted into hydrochloric acid phase and POP was left on the membrane. POP was oxygenated at 120°C

0.12MPa with potassium persulphate. Phosphomolybdate blue spectrophotometry was used in the determination. The proper volume of seawater sample for simultaneously determining PIP and POP was 100–150ml

containing PIP≥0.27μg

POP≥0.69μg. Relative Standard Deviation (RSD) of the determination of PIP and POP was 5.8% and 4.3% respectively. This method was used to determine POP and PIP in the surface water of Huiquan Bay

Qingdao

China. PIP content there averaged at 69.0μg/L and POP at 3.3 μg/L. PIP is the main form (>93%) of particulate phosphorus (PP). Maximum PIP coincided with flood tide

indicating that PIP mainly originated from disturbance of surface sediments. At the offshore area

maximum of PIP appeared at flood tide and minimum of PIP appeared at ebb-tide. The maximum of POP presented at about 10:00am

which suggests that POP is closely related to biological metabolism. The control factor of POP in seawater was concluded to be biological metabolization.

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references

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