摘要
用气相色谱-电子捕获器法测定了北京郊区某养鸡场不同生长期的饲养鸡的肌肉、表皮、肝脏、胃、心脏以及鸡蛋、饲料和粪便中HCH的残留浓度.分析结果表明,饲养鸡体内肌肉、表皮、肝脏、胃和心脏的∑HCH湿重浓度分别为(0.35±0.37)、(3.91±2.52)、(1.78±1.26)、(1.00±0.85)和(1.35±0.75)ng/g,脂标化浓度分别为(64.3±171)(、19.6±7.33)(、64.9±27.2)、(74.5±74.1)和(17.8±4.42)ng/g,远低于国家《食品中农药残留最大限量》标准.肝脏∑HCH脂标化浓度显著高于其他器官,而未观察到HCH各异构体残留水平在肌肉、表皮、心脏与胃之间具有显著差别.除饲料、胃和粪便内各HCH异构体成分中以-δHCH为主外,-βHCH是鸡体内与鸡蛋中残留最高的异构体.-βHCH在鸡体内各器官都体现出富集的特性,肝脏对除-δHCH以外的3种异构体也都体现出显著的富集特性.对成年绿柴鸡(雄)和绿壳蛋鸡(雌)样品中HCHs残留水平的对比分析显示,雄性较雌性具有更强的HCHs富集能力.
The concentrations of hexachlorocyelohexane isomers （HCHs） in muscle, skin, liver, stomach, heart, eggs, feed and feces of chicken from a poultry farm were determined by GC-ECD. The residue level of total HCHs （∑HCHs） in muscle, skin, liver, stomach and heart were （0.35±0.37）, （3.91 ±2.52）, （1.78±1.26）, （1.00±0.85）, （1.35±0.75） ng/g （wet weight） while the lipid normalized concentrations were （64.3 ± 171）, （19.6 ± 7.33）, （64.9 ± 27.2）, （74.5 ± 74.1 ）, （17.8 ± 4.42） ng/g, respectively, which are far lower than the Maximum Residue Limits for Food in China. Among all tissue samples, the highest lipid-normalized concentration was observed in the liver and no significant differences were observed among other organs, δ-HCH was the predominant isomer in chicken feed, stomach and faces, while β-HCH owned the highest concentration in all other samples, β-HCH was enriched in muscle, skin, liver, stomach and heart, while α-HCH and δ-HCH were also enriched in liver. Significant difference was revealed between male and female chicken in terms of bioaccumulation, indicating higher bioaccumulation ability of the former.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2008年第1期207-211,共5页
Environmental Science
基金
国家自然科学基金项目(40332015)
国家重点基础研究发展规划(973)项目(2003CB415004)
关键词
六六六
饲养鸡
内脏分布
雌雄差异
hexachlorocyclohexane
chicken
tissue distribution
sexual difference
