Performance of the autoclave digestion method for total phosphorus analysis

Jeffries, D. S.; Dieken, Fred P.; Jones, D.E.

doi:10.1016/0043-1354(79)90206-9

Cited by 85 publications

(35 citation statements)

References 5 publications

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“…The mean precision of determinations was 4.1%. Samples for total dissolved P (TDP), assumed to be equal to dissolved inorganic and organic P, were acidified with potassium persulfate and autoclaved (Jeffries et al 1979), and analysed as for SRP above. Dissolved organic P (DOP) was calculated as the difference between TDP and SRP.…”

Section: Water Chemistry Analysesmentioning

confidence: 99%

Speciation, phase association and potential bioavailability of phosphorus on a Svalbard glacier

et al. 2008

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Glacier surfaces are known to harbour abundant and active microbial communities. Phosphorus has been shown to be deficient in glacial environments, and thus is one of the limits on microbial growth and activity. We quantified the phosphorus pool in cryoconite debris and the concentration of dissolved phosphorus in supraglacial water on Werenskioldbreen, a Svalbard glacier. The mean total P content of the cryoconite debris was *2.2 mg g -1 , which is significantly more than would be expected in rock debris from local sources. 57% of this P was present in the fraction defined as organic P. It may account for the P in excess of the rock debris, and could be explained by allochthonous input of organic matter. The concentration of total dissolved P in supraglacial water was very low (5.2-8.5 lg l -1 ), which was probably caused by efficient flushing and re-adsorption onto mineral surfaces. Dissolved organic P (DOP) was a very important component of the dissolved phosphorus pool on Werenskioldbreen, as concentrations of DOP typically exceeded those of dissolved inorganic P (or SRP) by more than four times in all the glacial water types. It is very difficult to assess whether P was limiting in this environment solely on the basis of the N:P ratios in the debris or biomass. There may be some degree of biological control over the C:N:P ratios in the debris, but the phosphorus cycling in the supraglacial environment on this glacier seems to be mainly controlled by physical and geochemical processes.

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Section: Water Chemistry Analysesmentioning

confidence: 99%

Speciation, phase association and potential bioavailability of phosphorus on a Svalbard glacier

et al. 2008

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“…The incomplete measurement of TP in waters containing particulate inorganic materials has been documented widely owing to failure of acid-persulphate digestion to release all P occluded within oxides and hydrous oxides (e.g. Jeffries et al, 1979;Lambert and Maher, 1995). Therefore, the efficiency of P recovery by acid-persulphate digestion tends to decrease as concentrations of suspended solids increase (Maher and Woo, 1998).…”

Section: Digestion Methodsmentioning

confidence: 99%

Review of robust measurement of phosphorus in river water: sampling, storage, fractionation and sensitivity

Jarvie

Withers

Neal

2002

Hydrol. Earth Syst. Sci.

180

164

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This paper reviews current knowledge on sampling, storage and analysis of phosphorus (P) in river waters. Potential sensitivity of rivers with different physical, chemical and biological characteristics (trophic status, turbidity, flow regime, matrix chemistry) is examined in terms of errors associated with sampling, sample preparation, storage, contamination, interference and analytical errors. Key issues identified include:The need to tailor analytical reagents and concentrations to take into account the characteristics of the sample matrix. The effects of matrix interference on the colorimetric analysis. The influence of variable rates of phospho-molybdenum blue colour formation. The differing responses of river waters to physical and chemical conditions of storage. The higher sensitivities of samples with low P concentrations to storage and analytical errors.Given high variability of river water characteristics in space and time, no single standardised methodology for sampling, storage and analysis of P in rivers can be offered. 'Good Practice' guidelines are suggested, which recommend that protocols for sampling, storage and analysis of river water for P is based on thorough site-specific method testing and assessment of P stability on storage. For wider sampling programmes at the regional/national scale where intensive site-specific method and stability testing are not feasible, 'Precautionary Practice' guidelines are suggested. The study highlights key areas requiring further investigation for improving methodological rigour.

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“…These methods give reproducible results and often compare favourably with other methods (Harwood et al, 1969). They are, however, not recommended for water samples containing "a higher proportion of suspended particulates" (O'Connor & Syers, 1975;Jeffries et al, 1979;Logan, 1982). They also give significantly lower recovery than other stronger oxidation mixtures as applied to sediments (Wyeth, 1973).…”

Section: Chemical Quantification Of Particulate Phosphorusmentioning

confidence: 99%

Particulate and dissolved phosphorus forms in freshwater: composition and analysis

Broberg

Persson

1988

Hydrobiologia

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In recent research, particulate and dissolved phosphorus components have been separated and characterized on the basis of their physical and chemical properties and partly by their origins.Classical operationally defined monitoring variables (dissolved reactive phosphorus, dissolved unreactive phosphorus and particulate phosphorus) are not congruent with known specific physical or chemical components of phosphorus in natural waters or with their bioavailability.Physical isolation of true particles, colloids and molecules of various sizes is possible at present although it is not recommended for routine use.Chemical characterization of particulate phosphorus is performed mainly by sediment extraction procedures (specialized for inorganic species) and -to a lesser degree -by cell extraction procedures (specialized for organic compounds). The extraction procedures are similar and physical preseparation or alternative procedures (e.g. enzymatic assays) are essential.Smaller colloids and dissolved compounds are physically separated by column chromatography and are often chemically characterized by degradation on the addition of specific enzymes.

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Performance of the autoclave digestion method for total phosphorus analysis

Cited by 85 publications

References 5 publications

Speciation, phase association and potential bioavailability of phosphorus on a Svalbard glacier

Speciation, phase association and potential bioavailability of phosphorus on a Svalbard glacier

Review of robust measurement of phosphorus in river water: sampling, storage, fractionation and sensitivity

Particulate and dissolved phosphorus forms in freshwater: composition and analysis

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