Beta
75371

COMPARATIVE STUDY BETWEEN PECTROPHOTOMETRIC AND HPLC METHODS USED FOR IODINE EXTRACTION IN MILK AND SOME DAIRY PRODUCTS

Article

Last updated: 22 Jan 2023

Subjects

-

Tags

-

Abstract

Determination of iodine in milk and its products is very important from the  nutritional view point. Simple and rapid extraction methods were evaluated and validated  for determining iodine in milk and some dairy products by Spectrophotometric  method  and HPLC methods . Iodine in milk ( raw and pasteurized), white soft cheese and yoghurt were extracted by three methods first, with ammonium persulfate, second with acetic and nitric acid, third with alkaline ashing . After extraction, the reaction of As3+-Ce4+ was performed at 32 ºC, the transmission was measured spectrophotometrically at 420 nm. The results showed the precision of the ammoniumpersulfate method for all samples (CV< 4%) are higher than that of the alkaline ashing and acetic acid with nitric acid methods. The recoveries of iodine added to samples in range 91- 97 %, 93 – 120 % for extraction of milk iodine with ammonium persulfate, mixture of acetic acid with nitric acid, respectively, are higher compared with alkaline ashing . In addition ,  the linear coefficient(r) for ammonium persulfate is 0.9994 better than mixture of acetic with nitric acid and alkaline ashing methods. The Comparison between spectrophotometric and HPLC methods for iodine analysis was carried on raw and pasteurized milk after extraction with  the three extraction methods. The data showed  reasonably strong correlation between results from both of those analytical methods ( r =  0.9641, .9682  0.9533  for ammo. persulfate , acetic acid with nitric acid and alkaline ashing respectively.It was found that method HPLC gave comparable results to spectrophotometric method.

DOI

10.21608/jfds.2012.75371

Keywords

Iodine, Milk, cheese, yoghurt, Ammo. persulfate, acetic with nitric acid, ashing, Spectrophotometery, HPLC

Authors

First Name

Magda

Last Name

Abd El Aziz

MiddleName

-

Affiliation

Dairy Chemistry Dept., Animal Production Res. Institute, Agric. Res. Center, Ministry of Agric.

Email

-

City

-

Orcid

-

First Name

Karima

Last Name

Abo El Enien

MiddleName

-

Affiliation

Dairy Chemistry Dept., Animal Production Res. Institute, Agric. Res. Center, Ministry of Agric.

Email

-

City

-

Orcid

-

Volume

3

Article Issue

4

Related Issue

11350

Issue Date

2012-04-01

Receive Date

2020-03-04

Publish Date

2012-04-01

Page Start

247

Page End

258

Print ISSN

2090-3650

Online ISSN

2090-3731

Link

https://jfds.journals.ekb.eg/article_75371.html

Detail API

https://jfds.journals.ekb.eg/service?article_code=75371

Order

5

Type

Original Article

Type Code

886

Publication Type

Journal

Publication Title

Journal of Food and Dairy Sciences

Publication Link

https://jfds.journals.ekb.eg/

MainTitle

-

Details

Type

Article

Created At

22 Jan 2023