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用电感耦合等离子体质谱(ICP-MS)测量了深圳市市场上销售的花甲、生蚝、鲍鱼等16种海产品,分析了铅含量以及同位素比,其中响螺、青口贝、生蚝的铅质量分数最高,分别为(1.52±0.21),(1.66±0.23),(1.16±0.15)μg/g干质量,超标,其它小于1.00μg/g干质量,同位素比207Pb/206Pb为0.76~0.89之间。将花甲,鲍鱼,生蚝,喂食昆明小白鼠(每组5只,质量35~38 g),喂食前后(24 h)眼球取血0.030 mL左右对比分析海鲜中铅进入血液的量,结果表明,生蚝喂食后铅有明显的上升,其中孕鼠生物有效性显著大于对照鼠。通过用水合醋酸铅加入鼠粮中喂食哺育期间母鼠,而被哺乳的新生小鼠血铅含量和母鼠喂食铅成正比,最后一组小鼠血液铅达到(1.95±0.35)μg/g,该组一直喂养2个月(8周)后小鼠个体体质量(15±4 g)与对照(26±5 g)相比显著小。实验表明高含量铅的海产品对孕妇以及哺乳期间母亲和婴儿更为危险。
16 kinds of marine products such as flower, oyster and abalone which were sold on the market in Shenzhen were measured by inductively coupled plasma mass spectrometry (ICP-MS), and the lead content and isotopic ratio were analyzed. The contents of snail, mussel, oyster lead (1.52 ± 0.21), (1.66 ± 0.23) and (1.16 ± 0.15) μg / g dry weight respectively, the others were less than 1.00 μg / g dry weight, and the isotope ratio of 207Pb / 206Pb was 0.76 ~ 0.89 between. The amount of lead into the blood in seafood was analyzed by comparing the amount of blood taken from the eyes of the pearl, abalone, oyster, Kunming mice (5 rats in each group, 35-38 g) before and after feeding (24 h), and the results showed that oysters Lead significantly increased after feeding, which pregnant rats bioavailability was significantly greater than the control mice. The blood lead levels in newborn mice that were breast-fed were proportional to the amount of lead fed to the dams by the addition of lead acetate hydrate to the rat diet, and lead in the last group of mice reached (1.95 ± 0.35) μg / g lead The body weight of mice (15 ± 4 g) was significantly smaller compared to the control (26 ± 5 g) after 2 months of feeding (8 weeks). Experiments have shown that high levels of lead in seafood are more dangerous to pregnant women and to mothers and infants during lactation.