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Laboratory Standard Operating Procedures Read chapter Read first chapter

2017 | OriginalPaper | Chapter

17. Phosphorus Determination by Murphy-Riley Method

Authors : Young-Hee Cho, S. Suzanne Nielsen

Published in: Food Analysis Laboratory Manual

Publisher: Springer International Publishing

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Abstract

The Murphy-Riley colorimetric method has been widely used to measure the phosphorus content in natural waters as well as in foods. The method is applicable to most foods after dry ashing of a food sample. The Murphy-Riley method involves an oxidation-reduction reaction in which phosphorus is reacted to form a chromogen-mineral complex that can be measured with a spectrophotometer at a visible wavelength. In this laboratory exercise, the phosphorus content of an ashed milk sample is determined by the Murphy-Riley method, which involves preparation of a phosphorus standard curve.

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previous chapter Water Hardness Testing by Complexometric Determination of Calcium
next chapter Iron Determination by Ferrozine Method
Literature
Murphy J, Riley JP (1962) A modified single solution method for the determination of phosphate in natural waters. Anal. Chim. Acta 27:31–36CrossRef
Ward RE, Legako JF (2017) Traditional methods for mineral analysis. Ch. 21, In: Nielsen SS (ed) Food Analysis, 5th edn. Springer, New York
Metadata
Title
Phosphorus Determination by Murphy-Riley Method
Authors
Young-Hee Cho
S. Suzanne Nielsen
Copyright Year
2017
Book
Food Analysis Laboratory Manual

Print ISBN: 978-3-319-44125-2

Electronic ISBN: 978-3-319-44127-6

Copyright Year: 2017

DOI
https://doi.org/10.1007/978-3-319-44127-6_17