Analysis of Total Phosphorus in Bottom Sediment by H2SO4-HNO3 Digestion and Its Application to Rock Samples.
Year: 1994
Type: article
Abstract: The concentration of total phosphorus in sandy and muddy bottom sediment were studied by using two kinds of procedures, the H2SO4-HNO3 digestion and the HF-HNO3 digestion. The recovery ratio of the H2SO4-HNO3 digestion procedure to the HF-HNO3 digestion procedure was between 90% and 101% and the mean value was 97%. The analitic accuracy of the H2SO4-HNO3 digestion procedure based up on the coefficient of variation was between 0.3% and 1.4%.There were no recongnizable differences of values between ground and unground samples in the H2SO4-HNO3 digestion procedure. It was necessary to use a watch glass to prevent a loss of phosphorus during the evaporation of sulfric acid due to heating.These procedures were also used for other kinds of rock samples such as basalt, andesite, rhyo-dacite welded tuff, sandstone etc. The recovery ratio of the H2SO4-HNO3 digestion procedure to the HF-HNO3 digestion procedure was between 79% and 104% (mean : 94%). These results suggested that the H2SO4-HNO3 digestion procedure was useful as an extraction procedure for measuring total phosphorus of bottom sediment and was applicable to rock samples.
DOI: 10.2965/jswe.17.276
Author: Yukio KOMAI
Language: English
Subfield: Water Science and Technology
Field: Environmental Science
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W1990350337