A sequential injection system for the in-line digestion and colorimetric determination of phosphorus in milk

M. J. Reis Lima; S. M. V. Fernandes; A. O. S. S. Rangel

doi:10.1111/j.1365-2621.2002.tb09578.x

A sequential injection system for the in-line digestion and colorimetric determination of phosphorus in milk

M. J. Reis Lima, S. M. V. Fernandes, A. O. S. S. Rangel^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

10 Citations (Scopus)

Abstract

A sequential injection analysis (SIA) system involving in-line digestion for the determination of total phosphorus in milk is presented. The developed manifold consists mainly of 2 phases: conversion of all forms of phosphorus into orthophosphates by hydrolysis and oxidation catalyzed by UV radiation (necessary for the efficient oxidation of organic phosphates) and spectrophotometric determination of the phosphomolybdenum blue formed. The proposed method was applied to several cow milk samples and the results were in good agreement with those provided by the reference method, with a maximum relative deviation of 5.2%. The detection limit of the method was around 2 mg P/L with a sampling rate of approximately 17 h^-1.

Original language	English
Pages (from-to)	3280-3283
Number of pages	4
Journal	Journal of Food Science
Volume	67
Issue number	9
DOIs	https://doi.org/10.1111/j.1365-2621.2002.tb09578.x
Publication status	Published - Nov 2002

Keywords

In-line UV/photo-oxidation
Milk
Sequential injection
Spectrophotometry
Total phosphorus

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10.1111/j.1365-2621.2002.tb09578.x

http://hdl.handle.net/10400.14/6800

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title = "A sequential injection system for the in-line digestion and colorimetric determination of phosphorus in milk",

abstract = "A sequential injection analysis (SIA) system involving in-line digestion for the determination of total phosphorus in milk is presented. The developed manifold consists mainly of 2 phases: conversion of all forms of phosphorus into orthophosphates by hydrolysis and oxidation catalyzed by UV radiation (necessary for the efficient oxidation of organic phosphates) and spectrophotometric determination of the phosphomolybdenum blue formed. The proposed method was applied to several cow milk samples and the results were in good agreement with those provided by the reference method, with a maximum relative deviation of 5.2%. The detection limit of the method was around 2 mg P/L with a sampling rate of approximately 17 h-1.",

keywords = "In-line UV/photo-oxidation, Milk, Sequential injection, Spectrophotometry, Total phosphorus",

author = "{Reis Lima}, {M. J.} and Fernandes, {S. M. V.} and Rangel, {A. O. S. S.}",

year = "2002",

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language = "English",

volume = "67",

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journal = "Journal of Food Science",

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T1 - A sequential injection system for the in-line digestion and colorimetric determination of phosphorus in milk

AU - Reis Lima, M. J.

AU - Fernandes, S. M. V.

AU - Rangel, A. O. S. S.

PY - 2002/11

Y1 - 2002/11

N2 - A sequential injection analysis (SIA) system involving in-line digestion for the determination of total phosphorus in milk is presented. The developed manifold consists mainly of 2 phases: conversion of all forms of phosphorus into orthophosphates by hydrolysis and oxidation catalyzed by UV radiation (necessary for the efficient oxidation of organic phosphates) and spectrophotometric determination of the phosphomolybdenum blue formed. The proposed method was applied to several cow milk samples and the results were in good agreement with those provided by the reference method, with a maximum relative deviation of 5.2%. The detection limit of the method was around 2 mg P/L with a sampling rate of approximately 17 h-1.

AB - A sequential injection analysis (SIA) system involving in-line digestion for the determination of total phosphorus in milk is presented. The developed manifold consists mainly of 2 phases: conversion of all forms of phosphorus into orthophosphates by hydrolysis and oxidation catalyzed by UV radiation (necessary for the efficient oxidation of organic phosphates) and spectrophotometric determination of the phosphomolybdenum blue formed. The proposed method was applied to several cow milk samples and the results were in good agreement with those provided by the reference method, with a maximum relative deviation of 5.2%. The detection limit of the method was around 2 mg P/L with a sampling rate of approximately 17 h-1.

KW - In-line UV/photo-oxidation

KW - Milk

KW - Sequential injection

KW - Spectrophotometry

KW - Total phosphorus

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DO - 10.1111/j.1365-2621.2002.tb09578.x

M3 - Article

AN - SCOPUS:0036867175

SN - 0022-1147

VL - 67

SP - 3280

EP - 3283

JO - Journal of Food Science

JF - Journal of Food Science

IS - 9

ER -

A sequential injection system for the in-line digestion and colorimetric determination of phosphorus in milk

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Keywords

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