A semi-automated method for the determination of inorganic, organic and total phosphate in sediments
1976/01/01 by K. I. Aspila, Haig Agemian, A. S. Y. Chau +1 · 979 citations
Chemistry · Earth and Planetary Sciences · Environmental Science · #AutoAnalyzer #Chemistry #Chromatography #Environmental Toxicology and Ecotoxicology #Environmental chemistry #Hydrochloric acid #Inorganic chemistry #Marine and coastal ecosystems #Organic chemistry #Phosphate #Phosphorus #Potassium #Soil and Water Nutrient Dynamics
paper · doi:10.1039/an9760100187
published in The Analyst 101(1200), 187 (Royal Society of Chemistry)
openalex publication_date 1976/01/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/25
Abstract
A simple, rapid and semi-automated method for the determination of inorganic, organic and total phosphorus in lake and river sediments is described. Total phosphorus is extracted from sediments with 1 N hydrochloric acid after ignition at a high temperature (550 °C) or by digestion with sulphuric acid-potassium persulphate at 135 °C in a sealed PTFE-lined Parr bomb. Organic phosphorus is determined by the difference in phosphorus content of the 1 N hydrochloric acid extract measured before and after ignition of the dry sediments at 550 °C. In all instances the orthophosphate is determined by using standard Technicon AutoAnalyzer II techniques. The interferences caused by silica and variable acid concentrations on the determination of phosphorus have been studied. Freedom from interferences under the chosen experimental conditions as well as the good results obtained for recovery and precision indicate that the methods are suitable for monitoring inorganic, organic and total phosphorus in sediments.
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