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An improved method for the determination of nitrate and nitrite in fresh and canned fruit and vegetable products.

Eipeson, W. E. and Mahadeviah, M. and Gowramma, R. V. and Sastry, L. V. L. (1974) An improved method for the determination of nitrate and nitrite in fresh and canned fruit and vegetable products. Journal of Food Science and Technology, India, 11 (5). 209-212, 20 ref..

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The interference by natural constituents of fruit and vegetables and Sn (present in canned products) in the 1-naphthyl amine method for detn. of nitrates/nitrites was studied. Tables and graphs of results are given. Dissolved Sn was removed by passing clarified extracts of canned fruit and vegetable products through a cation exchange resin column leaving less than 50% Sn in the undissolved form. Nitrate recovery was approx. 96% compared with 9-15% for samples before passing through the column. Fe and organic acids did not interfere in the estimation of nitrates and nitrites. Treatment of extracts containing ascorbic acid with CuSO4 and warming to 80 degree C quantitatively removed most of the inhibitory effect of ascorbic acid. Recovery was 99% compared with 21% for samples without this treatment. Nitrates/nitrites recovery from tomato paste (a typical product which interferes in the estimation) was 95% after treatment with activated charcoal compared with 33% for samples before treatment.

Item Type: Article
Uncontrolled Keywords: FRUIT-(COMPOSITION); nitrites detn. in fruit; nitrates detn. in fruit; CANNED-FOODS; canned foods, nitrites detn. in; canned foods, nitrates detn. in; NITRATES-; vegetables, nitrates detn. in; NITRITES-; fruit, nitrites detn. in; vegetables, nitrites detn. in; fruit, nitrates detn. in; VEGETABLES-(COMPOSITION); nitrates detn. in vegetables; nitrites detn. in vegetables
Subjects: 600 Technology > 08 Food technology > 23 Vegetables
600 Technology > 08 Food technology > 24 Fruits
600 Technology > 01 Medical sciences > 17 Toxicology
600 Technology > 08 Food technology > 06 Preservation and Storage > 01 Canning
Divisions: Fruit and Vegetable Technology
Depositing User: Food Sci. & Technol. Information Services
Date Deposited: 18 Mar 2010 09:04
Last Modified: 18 Mar 2010 09:04
URI: http://ir.cftri.com/id/eprint/3000

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