Nitrate levels in fresh vegetables and berries from central Japan |
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Authors: | Masayuki Morohashi Nami Enya Kazuyuki Suzuki Takashi Asada |
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Institution: | 1. Faculty of Applied Life Sciences , Niigata University of Pharmacy and Applied Life Sciences , 265-1 Higashijima, Akiha-ku, Niigata 956-8603, Japan;2. Faculty of Symbiotic Systems Science , Fukushima University , 1 Kanayagawa, Fukushima 960-1296, Japan |
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Abstract: | Nitrate concentrations in 326 recent vegetables and berries sold in Niigata, located in central Japan, were investigated. Maximum nitrate concentrations of 6600 mg kg?1 were detected in samples of komatsuna (Brassica campestris var. perviridis) and mizuna (B. campestris L.). Mean concentrations ranged from 4 mg kg?1(blueberry) to 3500 mg kg?1 (mizuna). Concentrations in spinach ranged from 10 to 6000 mg kg?1 (mean 1500 mg kg?1). Nitrate intake from spinach and Japanese radish (Raphanus sativus) were estimated to be 0.7 and 0.8 mg kg?1 day?1, respectively. These values are equivalent to 19% and 23% of the acceptable daily intake (ADI). Nitrate intake at the 90th percentile was estimated to be 1.3 mg kg?1 day?1 (35% of the ADI) from spinach and 1.6 mg kg?1 day?1 (43% of the ADI) from Japanese radish. |
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Keywords: | nitrate vegetable spinach berry intake |
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