[Analysis of components in natural food additive "grapefruit seed extract" by HPLC and LC/MS].

S Sakamoto, K Sato, T Maitani, T Yamada
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Abstract

The components in a commercial natural food additive "Grapefruit seed extract" and the ethanol extract of grapefruit seeds were analyzed by HPLC and LC/MS. The HPLC chromatogram of the commercial grapefruit seed extract was quite different from that of the ethanol extract of grapefruit seeds. Three main peaks were observed in the chromatogram of the commercial grapefruit seed extract. By comparison of the retention times and the absorption spectra with those of authentic samples, two peaks were ascribed to methyl-p-hydroxybenzoate and 2,4,4'-trichloro-2'-hydroxydiphenylether (triclosan). Triclosan was also identified by LC/MS by using the negative electrospray ionization method.

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天然食品添加剂“葡萄柚籽提取物”成分的HPLC和LC/MS分析
采用高效液相色谱法(HPLC)和液相色谱质谱法(LC/MS)对市售天然食品添加剂“葡萄柚籽提取物”和葡萄柚籽乙醇提取物的成分进行了分析。市售葡萄柚籽提取物的HPLC图谱与葡萄柚籽乙醇提取物的HPLC图谱有很大的不同。在商品葡萄柚籽提取物的色谱中观察到三个主要峰。通过与真实样品的保留时间和吸收光谱的比较,两个峰归属于对羟基苯甲酸甲酯和2,4,4'-三氯-2'-羟基二苯醚(三氯生)。采用负电喷雾电离法对三氯生进行了液相色谱/质谱鉴定。
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