海藻食品中のミネラル含有量. Mineral Contents in Japanese Seaweeds

Transcription

1 Ann. Rep. Tokyo Metr. Inst. P.H., 55, 2004 海藻食品中のミネラル含有量 Mineral Contents in Japanese Seaweeds Yoko MATSUSHIMA Masao IGUCHI Norihisa KIKUTANI and Kazuo SAITO The contents of 8 minerals (Na, K, Ca, Mg, P, Zn, Fe, Cu) and 6 essential trace elements (Mn, Mo, V, Co, Ni, Cr) in Japanese dried seaweeds for food were analyzed by inductivily coupled plasma (ICP) atomic emission spectrometry. The seaweeds samples, Hijiki, Kombu, Wakame and Green laver, were collected from markets in Tokyo. Analytical results for Fe and Zn in 7 Hijiki samples showed a wide range of variation of mg/g(CV 89.7%), 3.9mg/g(CV 106.1%), respectively. The results for minerals were compared with the values described in the Standard Table of Food Composition in Japan, fifth edition (Standard Table). Notable differences between the mean values obtained by analysis and the values described in Standard Table were observed for Ca in Mitsuishikombu, Wakame and Green laver, for K, Mg in Green laver and for P in Mitsuishikombu and Wakame. In all the samples, the mean values obtained by analysis for Fe were lower than the values described in Standard Table. Keywords minerals lifestylerelated diseases elements seaweeds Hijiki Kombu Wakame Green laver inductivily coupled plasma atomic emission spectrometry standards for nutrition labeling 緒言 1) 実験方法 1. 試料 (Hizikia fusiformis (Harvey) Okamura ) 7 (Laminaria angustata Kjellman in Kjellman et Petersen ) 5 (Laminaria ochotensis Miyabe in Okamura ) 3 (Laminaria diabolita Miyabe in Okamura ) 1 (Undaria pinnatifia (Harvey) Suringar ) 6 (Enteromorpha prolifera (Mueller) J.Agardh ) 測定対象元素 (Na) (K) (Ca) (Mg) (P) (Fe) (Zn) (Cu) 8 (Cr) (Co) (Ni) (Mn) (V) (Mo) Tokyo Metropolitan Institute of Public Health 3241, Hyakunincho, Shinjukuku, Tokyo Japan

2 164 Ann. Rep. Tokyo Metr. Inst. P.H., 55, 装置 ( ) KM600 ( ) IRIS Advantage Na K Ca Mg P Fe Zn Cu Mn 2) Cr Co Ni V Mo nm nm nm nm nm (NIES No.9 Sargassum felvellum) ICP Table ) 4. 試薬 ( ) ( ) Na K Ca Mg Fe Zn Cu Cr Co Ni Mn V Mo mg/l P mg/l NIES NIES No.9 (SARGASSO) 5. 分析操作 1 g (1:1) (1:1) 30 ( A 25 ml Fe Zn Cu Cr Co Ni Mn V Mo 50 Na K Ca Mg P Fe Zn Cu Cr Co Ni Mn V Mo Na K Ca Mg P 2 1 % 0 2 µg/ml 0 20 µg/ml 結果及び考察 1. 標準試料による分析精度の確認 2. 分析結果 Table 2 Table 3 Table 4 ICP 1) ひじき Ca Fe 4) Ca mg/g 14.1 % Fe 3 mg/g % 15 % P mg/g 25.1 Zn 9 12 mg/ 5) Zn mg/g 67 % % 6) Fe Fe 2) こんぶ 7 3 Ca 170 Table 1. Comparison of Analyzed Values with Guarantee Values of Standard * mg / g Elements Na K Ca Mg P Mn Guarantee value 1.70± 6.10±0 1.34± 0.65± 6** 2± Elements Zn Fe Cu V Co Cr Guarantee value 15.6± 187±6 4.9± ± 2± ** *Standard sample: NIES No.9 SARGASSO, ** Reference value n=3

3 55, Table 2. Contents of Minerals and Trace Elements in Seaweeds (Hijiki) Reference value* 4, Chiba 2,400 8, Tokushima 6, N.D*.* Tokushima 5, No.6 2,200 2, No , , *Reference value: the values described in the Standard Table of Food Composition in Japan, fifth revised edition limit<0.0025mg/g n=3 **Detection % P 200 % Fe 23 % Na Ca Mg P Fe 75 % 1 3) わかめ Ca 159 % P 300 % P 7) Fe 50 % 4) あおのり Na K 21 % 350 % Ca 263 Fe Zn 46 % 4.9 % Mg % Mg Mg ATP 8) Ca Mg 5) 必須微量元素 6 Mo 9) mg/g 1 2 V 10) 0.65 mg/g Co Ni Cr Co mg/g Ni mg/g Cr mg/g mg/g mg/g mg/g 3. 成分表記載値と栄養表示 8 11) %

4 166 Ann. Rep. Tokyo Metr. Inst. P.H., 55, 2004 Table 3. Contents of Minerals and Trace Elements in Seaweeds (Mitsuishikombu,kombu and Enagaonikombu) Reference value (Mitsuishikombu) * 3, ,000 6, , ,300 5, , , Reference value (kombu) * 5, , ,500 5, , , Reference value (Enagaonikombu) * 2,400 7, Rausu 2,400 8, *Reference value: the values described in the Standard Table of Food Composition in Japan, fifth revised edition limit<0.0025mg/g n=3 **Detection まとめ 文献 1) 2000, 2) ) NIES No ) ) ) 70,284287,2004.

5 55, Table 4. Contents of Minerals and Trace Elements in Seaweeds (Wakame and Green laver) Reference value (Wakame) * 9, , Sanriku 6, , , , , No.6 7, , Reference value (Green laver) * 3, Unknown 1,800 1, Unknown 230 2,400 2,000 2, Kouchi 570 2, 2, , *Reference value: the values described in the Standard Table of Food Composition in Japan, fifth revised edition n=3 **Detection limit<0.0025mg/g 7) ) Michailova,A and McCulloch,A,Biophys J, 81,614629, ) ) )