[1] Bostrom, B., Jansson, M. and Forsberg, C. (1982) Phosphorus Release from Lake Sediments. Archives of Hydrobiology, 18, 5-59
[2] Gardolinski, P.C.F.C., Worsfold, P.J. and McKelvie, I.D. (2004) Seawater Induced Release and Transformation of Organic and Inorganic Phosphorus from River Sediments. Water Research, 38, 688-692.
https://doi.org/10.1016/j.watres.2003.10.048
[3] Herbes, S.E., Allen, H.E. and Mancy, K.H. (1975) Enzymatic Characterization of Soluble Organic Phosphorus in Lake Water. Science, 187, 432-434.
https://doi.org/10.1126/science.187.4175.432
[4] Quiquampoix, H. and Mousain, D. (2005) Organic Phosphorus in the Environment. In: Turner, B.L., Frossard, E. and Baldwin, D.S., Eds., Enzymatic Hydrolysis of Organic Phosphorus, CABI, London, 89.
[5] Redfield, A.C., Smith, H.P. and Ketchum, B. (1937) The Cycle of Organic Phosphorus in the Gulf of Maine. The Biological Bulletin, 73, 421-443.
https://doi.org/10.2307/1537605
[6] Whitton, B.A., et al. (2005) Organic Phosphorus in the Environment. In: Turner, B.L., Frossard, E. and Baldwin, D.S., Eds., Ecological Aspects of Phosphatase Activity in Cyanobacteria, Eukaryotic Algae and Bryophytes, CABI, London, 205.
[7] Monbet, P., McKelvie, I.D. and Worsfold, P.J. (2009) Dissolved Organic Phosphorus Speciation in the Waters of the Tamar Estuary (SW England). Geochimica et Cosmochimica Acta, 73, 1027-1038.
https://doi.org/10.1016/j.gca.2008.11.024
[8] John, M.K. (1970) Colorimetric Determination of Phosphorus in Soil and Plant Materials with Ascorbic Acid. Soil Science, 109, 214-220.
https://doi.org/10.1097/00010694-197004000-00002
[9] To, Y.S. and Randall, C.W. (1977) Evaluation of Ascorbic Acid Method for Determination of Orthophosphates. Journal of the Water Pollution Control Federation, 49, 689-692.
[10] Pai, S.C., Yang, C.C. and Riley, J.P. (1990) Effects of Acidity and Molybdate Concentration on the Kinetics of the Formation of the Phosphoantimonylmolybdenum Blue Complex. Analytica Chimica Acta, 229, 115-120.
https://doi.org/10.1016/S0003-2670(00)85116-8
[11] Blomqvist, S., Hjellstrom, K. and Sjosten, A. (1993) Interference from Arsenate, Fluoride and Silicate When Determining Phosphate in Water by the Phosphoantimolylmolybdenum Blue Method. International Journal of Environment Analytical Chemistry, 54, 3-43.
https://doi.org/10.1080/03067319308044425
[12] Zhao, J.B. (2006) Analytical Methods for the Determination of Inorganic and Organic Phosphorus in Natural Water, in 2nd Year Report. SEOES: University of Plymouth.
[13] Smil, V. (2000) Phosphorus in the Environment: Natural Flows and Human Interferences. Annual Review of Energy and Environment, 25, 53-88.
https://doi.org/10.1146/annurev.energy.25.1.53
[14] APHA (1976) Standard Methods for the Examination of Water and Wastewater. 14th Edition, American Public Health Association, New York.
[15] Mankasingh, U. (2005) Techniques for Studying the Biogeochemistry of Nutrients in the Tamar Catchment. Ph.D. Thesis, University of Plymouth, Plymouth.
[16] Langston, W.J., et al. (2003) Characterisation of the South West European Marine Sites: Plymouth Sound and Estuaries cSAC, SPA. Marine Biological Association of the United Kingdom, 315-324.
[17] Tuckwell, R. (2008) Flow Injection Techniques for the Determination of Nutrients in Natural Waters. MPhil Thesis, University of Plymouth, Plymouth.
[18] Linge, K.L. and Oldham, C.E. (2001) Interference from Arsenate When Determining Phosphate by the Malachite Green Method. Analytica Chimica Acta, 450, 247-252.
https://doi.org/10.1016/S0003-2670(01)01388-5
[19] Holleman, A.F. and Wiberg, E. (2001) Inorganic Chemistry. Academic Press, San Diego, 741-755.
[20] Badr, E.A., Tappin, A. and Achterberg, E. (2008) Distributions and Seasonal Variability of Dissolved Organic Nitrogen in Two Estuaries in SW England. Marine Chemistry, 110, 153-164.
https://doi.org/10.1016/j.marchem.2008.04.007
[21] Mighanetara, K., et al. (2008) Contaminant Fluxes from Point and Diffuse Sources from Abandoned Mines in the River Tamar Catchment, UK. Journal of Geochemical Exploration, 100, 116-124.
https://doi.org/10.1016/j.gexplo.2008.03.003
[22] Elbaz-Poulichet, F., et al. (1999) Trace Element Geochemistry in the Upper Amazon River. Geochimica et Cosmochimica Acta, 36, 1061-1066.
[23] Kerouel, R. and Aminot, A. (1995) Model Compounds for the Determination of Organic and Total Phosphorus Dissolved in Natural Waters. Analytica Chimica Acta, 318, 385-390.
https://doi.org/10.1016/0003-2670(95)00461-0
[24] Thurman, E.M. (1985) Organic Geochemistry of Natural Waters. Nijhoff & Junk, Boston, 9.
[25] McKelvie, I.D. (2005) Separation, Preconcentration and Speciation of Organic Phosphorus in Environmental Samples. In: Turner, B.L.e.a., Ed., Organic Phosphorus in the Environment, CABI Publishing, London, 1-20.
[26] Haygarth, P.M., Warwick, M.S. and House, W.A. (1997) Size Distribution of Colloidal Molybdate Reactive Phosphorus in River Waters and Soil Solution. Water Research, 31, 439-448.
https://doi.org/10.1016/S0043-1354(96)00270-9
[27] Ridal, J.J. and Moore, R.M. (1990) A Re-Examination of the Measurement of Dissolved Organic Phosphorus in Seawater. Marine Chemistry, 29, 19-31.
https://doi.org/10.1016/0304-4203(90)90003-U
[28] Schwab, E.C. (2007) Low-Level Phosphorus Determination by USEPA Persulfate Digestion Method 365.1. National Water Quality Laboratory, Denver, 44.
[29] Rowland, A.P. and Haygarth, P.M. (1997) Determination of Total Phosphorus in Soil Solutions. Journal of Environmental Quality, 26, 410-415.
https://doi.org/10.2134/jeq1997.00472425002600020011x
[30] Worsfold, P.J., et al. (2005) Sampling, Sample Treatment and Quality Assurance Issues for the Determination of Phosphorus Species in Natural Waters and Soils. Talanta, 66, 273-293.
https://doi.org/10.1016/j.talanta.2004.09.006
[31] Maher, W. and Woo, L. (1998) Procedures for the Storage and Digestion of Natural Waters for the Determination of Filterable Reactive Phosphorus, Total Filterable Phosphorus and Total Phosphorus. Analytica Chimica Acta, 375, 5-47.
https://doi.org/10.1016/S0003-2670(98)00274-8
[32] Martin, M., Celi, L. and Barberis, E. (1999) Determination of Low Concentration of Organic. Phosphorus in Soil Solution. Communications in Soil Science and Plant Analysis, 30, 1909-1917.
https://doi.org/10.1080/00103629909370341
[33] Espinosa, M., Turner, B.L. and Haygarth, P.M. (1999) Preconcentration and Separation of Trace Phosphorus Compounds in Soil Leachate. Journal of Environmental Quality, 28, 1497-1504.
https://doi.org/10.2134/jeq1999.00472425002800050015x
[34] Jenkins, D. (1986) Advanced Chemistry. Oxford University Press, Oxford, 41.
[35] Nguyen, L. and Sukias, J. (2002) Faecal Contamination and the Removal of Escherichia Coli (E. coli) in Drainage Ditches. In: Currie, L.D. and Loganathan, P., Eds., Dairy Farm Soil Management, Fertilizer and Lime Research Centre, Massey University, Palmerston North, 261-266.
[36] Aminot, A. and Kérouel, R. (2001) An Automated Photo-Oxidation Method for the Determination of Dissolved Organic Phosphorus in Marine and Fresh Water. Marine Chemistry, 76, 113-126.
https://doi.org/10.1016/S0304-4203(01)00052-4
[37] Sandford, R.C., Exenberger, A. and Worsfold, P.J. (2007) Nitrogen Cycling in Natural Waters Using in Situ, Reagentless UV Spectrophotometry with Simultaneous Determination of Nitrate and Nitrite. Environmental Science & Technology, 41, 8420-8425.
https://doi.org/10.1021/es071447b