Nitrate, Nitrite, and Iodine Concentrations in Commercial Edible Algae: An Observational Study

Edible algae are a natural source of nutrients, including iodine, and can also contain nitrogen in the form of nitrate (NO ) and nitrite (NO ) as they can fix nitrogen from seawater. This study aimed to analyse the NO , NO , and iodine concentrations in eighteen macroalgae and five microalgae specie...

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Bibliographic Details
Published in:Foods 2024-08, Vol.13 (16), p.2615
Main Authors: Casas-Agustench, Patricia, Hayter, Jade M, Ng, Odelia S B, Hallewell, Lauren V, Clark, Nathaniel J, Bescos, Raul
Format: Article
Language:English
Subjects:
Algae
Aquatic microorganisms
Chemical analysis
Chemical properties
Distribution
Dunaliella salina
edible algae
High performance liquid chromatography
Inductively coupled plasma mass spectrometry
Iodine
Liquid chromatography
Marine algae as food
Mass spectrometry
Mass spectroscopy
Microalgae
nitrate
Nitrates
nitrite
Nitrites
Nitrogen dioxide
Nutrients
Nutritional aspects
Observational studies
Seawater
Seaweeds
Thyroid gland
Water analysis
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Summary:Edible algae are a natural source of nutrients, including iodine, and can also contain nitrogen in the form of nitrate (NO ) and nitrite (NO ) as they can fix nitrogen from seawater. This study aimed to analyse the NO , NO , and iodine concentrations in eighteen macroalgae and five microalgae species commercially available in the United Kingdom. NO and NO concentrations were measured using high-performance liquid chromatography (HPLC), and iodine was determined using inductively coupled plasma mass spectrometry (ICP-MS). NO and iodine concentrations in macroalgae (NO : 4050.13 ± 1925.01 mg/kg; iodine: 1925.01 ± 1455.80 mg/kg) were significantly higher than in microalgae species (NO : 55.73 ± 93.69 mg/kg; iodine: 17.61 ± 34.87 mg/kg; < 0.001 for both). In the macroalgae group, nori had the highest NO (17,191.33 ± 980.89 mg/kg) and NO (3.64 ± 2.38 mg/kg) content, as well as the highest iodine content. Among microalgae, had the highest concentration of NO (223.00 ± 21.93 mg/kg) and iodine (79.97 ± 0.76 mg/kg), while had the highest concentration of NO (7.02 ± 0.13 mg/kg). These results indicate that commercially available edible algae, particularly macroalgae species, could be a relevant dietary source of NO and iodine.
ISSN:2304-8158
2304-8158
DOI:10.3390/foods13162615