| Determination of vitamin A in foods--a review. | |
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MedLine Citation:
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PMID: 336289 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Formerly, few foods were routinely analyzed for vitamin A, but recent emphasis on nutrient requirements, nutrient labeling, and use of dietary convenience foods has created need for determining vitamin A in a variety of foods. There are many vitamin A methods--some suitable for certain products only. For regulatory purposes, the FDA specifies the AOAC method where it is applicable. However, some food analysts and organizations continue with their own vitamin A methods. If possible, a single, widely applicable general method should be used for vitamin A in foods. Vitamin A may be determined by spectrophotometric, colorimetric, and fluorometric procedures. Sometimes chromatography is required as an important part of the method. Colorimetric procedures with SbCl3 are now most widely used to measure vitamin A (retinol) in foods. If vitamin A content is high enough and extracts sufficiently free of interfering substances, spectrophotometric or flurometric methods are satisfactory. Methods in various stages of development for determining vitamin A in foods are based on flurospectrophotometry, gas-liquid chromatography, high-performance liquid chromatography, and automation. To estimate total vitamin A nutritional value of certain foods may also require determination of vitamin A isomerization and contents of carotenes, cryptoxanthin, reinaldehyde, and apo-carotenal. |
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Authors:
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D B Parrish |
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Publication Detail:
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Type: Journal Article; Review |
Journal Detail:
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Title: CRC critical reviews in food science and nutrition Volume: 9 ISSN: 0099-0248 ISO Abbreviation: CRC Crit Rev Food Sci Nutr Publication Date: 1977 |
Date Detail:
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Created Date: 1978-01-27 Completed Date: 1978-01-27 Revised Date: 2007-11-15 |
Medline Journal Info:
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Nlm Unique ID: 7513255 Medline TA: CRC Crit Rev Food Sci Nutr Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 375-94 Citation Subset: IM |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animal Feed
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analysis Carotenoids / analysis* Cereals / analysis Chromatography / methods Colorimetry / methods Dairy Products / analysis Evaluation Studies as Topic Fluorometry / methods Food Analysis / methods* Food, Formulated / analysis Food, Fortified / analysis Infant Food / analysis Margarine / analysis Meat / analysis Vitamin A / analysis* |
| Chemical | |
Reg. No./Substance:
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11103-57-4/Vitamin A; 36-88-4/Carotenoids; 8029-82-1/Margarine |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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