無機元素分析による乾シイタケの原料原産地および栽培方法の判別  [in Japanese] Determination of the Geographic Origin and the Cultivation Method of Dried Shiitake Mushroom by Inorganic Analysis  [in Japanese]

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Abstract

乾シイタケの傘部をマイクロ波試料分解装置により酸分解して試料溶液を調製した後,誘導結合プラズマ発光分析法により10元素(Na, Mg, P, K, Ca, Mn, Fe, Zn, Sr及びBa),また,誘導結合プラズマ質量分析法により19元素(Li, Al, V, Co, Ni, Cu, Rb, Y, Mo, Cd, Cs, La, Ce, Nd, Sm, Gd, W, Tl及びPb)を定量した.<BR>国産原木栽培品50試料,中国産原木栽培品47試料及び中国産菌床栽培品50試料の定量値を用いて構築した,栽培方法を判別する関数は別の検定用の60試料を100%の判別的中率で予測した.国産原木栽培品50試料と中国産原木栽培品47試料の定量値を用いて構築した,原料原産地を判別する関数は検定用の45試料を93%の判別的中率で予測した.これらの判別関数を2段階で利用することにより検定用試料全60件を95%の判別的中率で予測できた.また,3群を判別する関数も構築し,検定用の60試料を93%の判別的中率で予測した.乾シイタケの栽培方法及び原料原産地表示の信憑性を無機分析により検証できる手法が確立できた.

The amount of imported of dried Shiitake (<I>Lentinula edodes</I>) mushrooms is twice that of Japanese production, with most imports coming from China. While all domestic cultivation occurs on logs, Chinese mushrooms are cultivated chiefly on sawdust-based medium. The Japan Agricultural Standard (JAS) law requires the correct labeling for both geographic origin and whether the cultivation method used log (GENBOKU) or sawdust-based medium (KINSHYOU) of dried Shiitake mushroom. We developed a method for determining whether dried Shiitake mushrooms originate in Japan or in China by quantifying 29 elements contained in 147 training samples. A linear discriminant analysis (LDA) model calibrated with concentrations of 5 elements (P, Cu, Zn, Mo and La) from 97 GENBOKU and 50 KINSHYOU samples, assigned the correct cultivation characteristics to 60 test samples with 100% certainty. An LDA model calibrated using the concentrations of 9 elements (Li, Mg, Al, Ca, Mn, Co, Mo, Cd and Ce) from 50 Japanese GENBOKU and 47 Chinese GENBOKU samples, correctly predicted 45 test samples with 93% certainty. In addition, the LDA model for a 3-group-classification, calibrated using the concentrations of 13 elements (P, Pb, Zn, Mo, La, Li, Mg, Al, Na, Mn, Co, Mo, Cd and Ce) from 50 Japanese GENBOKU, 47 Chinese GENBOKU and 50 Chinese KINSHYOU samples, correctly predicted the origin and type of 60 test samples with 93% certainty. It was demonstrated that the assignment of geographic origin and cultivation method of dried Shiitake could be accurately authenticated by this method.

Journal

  • NIPPON SHOKUHIN KOGYO GAKKAISHI  

    NIPPON SHOKUHIN KOGYO GAKKAISHI 53(9), 489-497, 2006-09-15 

    Japanese Society for Food Science and Technology

References:  19

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Cited by:  12

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Codes

  • NII Article ID (NAID)
    10018254988
  • NII NACSIS-CAT ID (NCID)
    AN10467499
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    1341027X
  • NDL Article ID
    8048851
  • NDL Source Classification
    ZP34(科学技術--食品工学・工業)
  • NDL Call No.
    Z17-126
  • Data Source
    CJP  CJPref  NDL  J-STAGE 
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