Evaluation of Flame Emission Determination of Phosphorus in Water [with List of References]
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Page : 18 pages
File Size : 10,71 MB
Release : 1973
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Author :
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Page : 18 pages
File Size : 10,71 MB
Release : 1973
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Author : William Rudolf Seitz
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Page : 28 pages
File Size : 37,35 MB
Release : 1973
Category : Emission spectroscopy
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Author : Thomas B. Hoover
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Page : 40 pages
File Size : 28,10 MB
Release : 1976
Category : Flame photometry
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"A second-generation flame spectometer for the direct determination of phosphorus in water was evaluated. Response to phosphorus in the form of phosphoric acid was linear from 0.5 to 16 ppm phosphorus. The relative standard deviation was approximately constant at 20 percent over the range. River water and municipal sewage effluent were analyzed after the addition of phosphoric acid (1.8 ppm P) and filtration through a series of microporous membranes. Recovery of the added phosphorus averaged 70 percent for the river water and 95 percent for the sewage effluent after treatment with cation exchange resin. There was no clear relation to filter pore size in the range 5 to 0.2 micrometers. Analyses of the higher range EPA Nutrient Reference Samples (approximately 0.5 ppm P) agreed within one standard deviation with the reference values, both for inorganic and total phosphorus. The lower concentration range samples (approximately 0.1 ppm P) gave barely detectable signals. Suggestions are given for further development of the instrument. -- Abstract
Author : William Rudolf Seitz
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Page : 72 pages
File Size : 17,40 MB
Release : 1973
Category : Emission spectroscopy
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Author :
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Page : 1570 pages
File Size : 42,7 MB
Release : 1974
Category : Government publications
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Author : United States. Environmental Protection Agency
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Page : 600 pages
File Size : 50,50 MB
Release : 1973
Category : Environmental engineering
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Author : United States. Environmental Protection Agency. Library Systems Branch
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Page : 588 pages
File Size : 26,57 MB
Release : 1974
Category : Environmental engineering
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Author : Asha Varma
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Page : 15 pages
File Size : 49,93 MB
Release : 1986
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Under the EPA regulations, waste water should not contain more than 5-6mg/L of total phosphorus before it is discharged into a public sewer system. The conventional methods for determining phosphorous in waste are time consuming and also require pretreatment of samples to convert all the phosphorous to the orth-phosphate form for analysis. Inductively coupled plasma-atomic emission spectrometric method (ICP-AES) has been successfully used to determine phosphorus in waste. This method is fast, accurate and does not require sample pretreatment prior to analysis. (Keywords: Inductively coupled plasma-atomic emission spectroscropy, Waste, Standard addition.
Author : Thomas B Hoover
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Page : 19 pages
File Size : 33,68 MB
Release : 1976
Category : Flame photometry
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Author : D. Scott Smith
Publisher :
Page : 60 pages
File Size : 17,82 MB
Release : 2016
Category : Science
ISBN : 9781780407807
Phosphorus monitoring at wastewater treatment plants is essential as phosphorus (as total phosphorus) is an important main constituent regulated in treatment plant effluents. Recent trends are towards increasingly lower phosphorus limits, requiring reliable lower and lower phosphorus measurements. There is a long history of P analysis in dilute matrices; i.e., river and lake water and best practices have been developed. These best practices for surface waters are reported herein. Potential issues in wastewater P analysis by colorimetry include, pH, proton to molybdenum ratio, color development time, and digestion method. Of equal importance are the QA/QC measurement protocols implemented by wastewater analysis labs; demonstrably well performing examples from Coeur d'Alene, Spokane, and the City of Las Vegas are presented. Total reactive phosphorus is an ambiguous analytical measurement because the quantitative results depend strongly on color development time. For low level analysis, long path lengths have advantages in more precisely resolving low concentrations. Replicate measurements are essential, especially for low level P samples, in order to capture the true value of the sample within variability.When dealing with low concentrations even a small absolute error is a large relative error; thus, replicate measurements are essential to estimate true concentrations for dilute phosphorus samples.