16～19℃水温下，采用静水式生物毒性试验法，研究了环氧丙烷、丙烯酸和异戊二烯对体质量（1．30±0．62）g的仿刺参幼参的急性毒性。研究结果表明，环氧丙烷、丙烯酸和异戊二烯对仿刺参幼参的24 h半致死质量浓度分别为181．53、117．63、70．40 mg／L ，48 h半致死质量浓度分别为148.91、109．81、68．28 mg／L ，72 h半致死质量浓度分别为133．62、102．70、67．25 mg／L ，96 h半致死质量浓度分别为98．89、100．34、66．55 m g／L ，24、48、72和96 h安全质量浓度分别为9．89、10．03、6．66 m g／L。毒性依次为：异戊二烯（中毒）＞环氧丙烷（中毒）＞丙烯酸（低毒）。本结果可为研究这三种化学品对海洋生物的生态毒理学及其应用提供参考。%Acute toxicity of propylene oxide , acrylic acid and isoprene to juvenile sea cucumber A postichopus j aponicus with body weight of (1 .30 ± 0 .62) g was studied at water temperature of 16—19 ℃ by static bioassay .It was found that LC50 of propylene oxide ,acrylic acid and isoprene to juvenile sea cucumber was 181 .53 ,117 .63 and 70 .40 mg/L for 24 h ,148 .91 ,109 .81 and 68 .28 mg/L for 48 h , 133.62 ,102 .70 and 67 .25 mg/L for 72 h ,and 98 .89 ,100 .34 and 66 .55 mg/L for 96 h ,with safe concentration of 9 .89 ,10 .03 and 6 .66 mg/L ,respectively ,indicating the descendant toxicity order as isoprene(moderate toxicity )> propylene oxide (moderate toxicity )> acrylic acid (low toxicity ) . The findings may provide the reference to ecological toxicology research of propylene oxide ,acrylic acid and isoprene to marine organisms .
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