Volatile Constituents of the Green Forage and Hay of Bahiagrass

粗飼料中の香気成分の種類とその量的分布を知るために、バヒアグラスの生草と乾草の揮発性成分を、ガスクロマトグラフ・マスペクトロメーター(GC-MS)および水素炎イオン化検出器のガスクロマトグラフ(FID-GC)によって分析した。揮発性成分中の各化金物の面積%および飼料中の各化合物のppb濃度は、正ペンタデカンを内部標準に用いてクロマトグラフ用データ処理装置によって算出した。それによって、バヒアグラス生草の揮発性成分から25化合物を同定し、それらの面積%およびppm値は、それぞれ総計78.2および22.0であった。この生草の揮発性成分は、量的にアルコール類、エステル類、ケトン類が多かった。一方、バヒアグラス乾草の揮発性成分から26化合物を同定し、それらの面積%およびppm値は、それぞれ総計79.4および12.0であった。この乾草の揮発性成分もまた、アルコール類、エステル類、ケトン類が多かった。両者の揮発性成分は、質的にほとんど同じであったが量的に若干の差があった。

In order to elucidate the qualitative disposition and the quantitative distribution of the aromatic constituents in roughage, the volatile constituents of the green forage and hay of bahiagrass were analyzed by a combined gas chromatograph-mass spectrometer (GC-MS) and a FID-gas chromatograph (FID-GC). The area percentage of each compound in the volatile constituents and the parts per billion (ppb) concentration of each compound in the materials were calculated on a data processor for FID-GC using n-pentadecane as the internal standard. As a result, 25 compounds were identified from the volatile constituents of the green forage of bahiagrass; their area percentages and ppm values totaled 78.2 and 22.0, respectively. The volatile constituents of this green forage were quantitatively rich in alcohols, esters, and ketones. On the other hand, 26 compounds were identified from the volatile constituents of the hay of bahiagrass; their area percentages and ppm values totaled 79.4 and 12.0, respectively. The volatile constituents of this hay were also rich in alcohols, esters, and ketones. Both volatile constituents were qualitatively about the same, but were somewhat different quantitatively.