The Gelidium amansii showed scavenging capacity to hydroxyl free radical generated by Fenton reaction and to superoxide anion generated by a pyrogallol autoxidation system.

• 采用水杨酸法和邻苯三酚法分别测定各相提取物对羟基自由基和超氧阴离子自由基的清除能力，结果表明石花菜有较强的抗氧化能力。