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Objective:PCDD/Fs level in 22 fish samples was investigated in Pearl river Delta area in order that the PCDD/Fs pollution level in common fish can be evaluated. Methods: Dibenzo-p-Dioxins and Dibenzo-Furans was extracted from the sample by Soxhlet extraction, concentrated then purified by column chromatography, carbon column enrichment,. Confirmation and quantitative analysis at ppt(pg/g) level of PCDD/Fs was performed by HRGC/HRMS using multiple ion detection mode(MID). Certified reference material using Proficiency test sample fish muscle test material 0613 that was obtained from Central Science Laboratory(CSL) in Britain. Results: The average of concentration in wet weight is 1.261 ng/kg,, the average total WHO-TEQ for 22 samples is 0.246ng/kg wet weight. Generally, OCDD, 2,3,7,8-TCDF, 1,2,3,4,6,7,8-HpCDD was the main contributors to the total 17 PCDD/Fs detected, average account for 21%,16%,14%, respectively. While 1,2,3,7,8-PeCDD, 2,3,4,7,8-PeCDF, 2,3,7,8-TCDD were main contributors to the total WHO-TEQ, account for 40%,27%, 13% respectively. The total TEQ for 22 fishes ranged from 0.03 ng/kg wet weight to 0.878 ng/kg wet weight. Conclusions: PCDD/Fs level was largely different from sample to sample depending on the sample kinds. The level in the Pearl river Delta area fish samples is not distinct comparing with other countries, but some kind fish level should be paid more attention on it since its higher level. The relationship between source of PCDD/Fs and PCDD/Fs level in fish will be studied deeply in the future. 相似文献
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蛇鮈个体生殖力的研究 总被引:2,自引:0,他引:2
蛇鮈绝对生殖力为4770(1476-14730)粒,相对生殖力(F/L)为393.3(113.5-978.1)粒/cm.F/Wu为326.6(71.0-651.0)粒/g。鱼体长范围为9.6-16.1cm,体重范围为8.9-52.4g,绝对生殖力和体长(L),净体重(W0)均呈直线正相关。 相似文献
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在西南边陲文山壮族苗族自治州境内的一些河溪中,生长有一种鱼,其体型延长,头部较小,鳞片呈灰白色,成年鱼体长约20厘米,重约100克,少数大个儿者长逾尺,重在250克以上。因该鱼尾鳍殷红,故当地钓鱼人叫它红尾马鱼,居住在中越边境一带的山民又叫它“红尾巴”。 相似文献
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尖吻黄盖鲽(pseudopluyonestes heyzensteini),鱼纲,鲽科,比目鱼属,亦称高眼鲽。辽东半岛、山东半岛、黄海、渤海及辽南沿海等地区俗称为“小嘴”、“鼓眼子”、“大偏口”等。该鱼体型延长,侧扁平,不对称。口小吻稍尖,牙齿细小尖利在无眼一侧。双眼在鱼体的右侧凸起明显(俗称“鼓眼子”据此由来)。有眼的一侧体色多呈黄褐或黑褐色,无眼的一侧为白色,体被鳞小且紧密, 相似文献