Katano Seiji, Matsuo Yuka, Hanaoka Ken'ichi
Katano Bussan Co Ltd, Mukuno-machi 3-13-18, Shimonoseki 751-0816, Japan.
Chemosphere. 2003 Oct;53(3):245-51. doi: 10.1016/S0045-6535(03)00447-8.
We investigated the water-soluble arsenic compounds present in the soft tissues of both the pearl-free and the pearl-containing pearl oysters. After dividing the soft tissue into five parts, i.e., adductor muscle, foot, mantle, viscera and gill, each part was analyzed by high-performance liquid chromatography-inductively coupled plasma mass spectrometry for the arsenic compounds accumulated in it. Arsenic concentration of each tissue part ranged from 22.1 to 45.7 microg g(-1) of dry tissue in the pearl-free pearl oyster and from 27.4 to 50.4 microg g(-1) of dry tissue in the pearl-containing pearl oyster. On the grounds of the present evidence the major water-soluble arsenic compound accumulated in each part was identified as arsenobetaine without exception in both types of pearl oysters (94.3-99.7% in the pearl-free pearl oyster and 87.2-99.7% in the pearl-containing pearl oyster). Trace or small amounts of arsenic compounds including tetramethylarsonium ion and arsenocholine were also detected in some parts. The levels of these minor arsenicals were a little higher in pearl-free pearl oyster than in the pearl-containing pearl oyster. This study confirms the hygienic safety of the soft tissues of both the pearl-free and the pearl-containing pearl oysters, as food.
我们研究了无珠和含珠珍珠贝软组织中存在的水溶性砷化合物。将软组织分为五个部分，即闭壳肌、足部、外套膜、内脏和鳃，然后用高效液相色谱 - 电感耦合等离子体质谱法分析每个部分中积累的砷化合物。无珠珍珠贝各组织部分的砷浓度范围为干组织的22.1至45.7微克/克，含珠珍珠贝为干组织的27.4至50.4微克/克。根据现有证据，在两种类型的珍珠贝中，每个部分积累的主要水溶性砷化合物均无一例外地被鉴定为砷甜菜碱（无珠珍珠贝中占94.3 - 99.7%，含珠珍珠贝中占87.2 - 99.7%）。在某些部分还检测到痕量或少量的砷化合物，包括四甲基砷离子和砷胆碱。无珠珍珠贝中这些次要砷化物的含量比含珠珍珠贝略高。本研究证实了无珠和含珠珍珠贝的软组织作为食品的卫生安全性。
