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投稿时间:2016-11-20
投稿时间:2016-11-20
中文摘要: 测定不同生长时间竹荪菌丝中邻苯二甲酸二丁酯(DBP,Dibutyl Phthalate)的含量,探讨竹荪菌丝对 DBP 是 否存在富集作用。通过外标法,并做加标回收试验,以培养液及空白培养液作为对照,用乙酸乙酯为溶剂,超声波辅助 提取溶剂法提取竹荪菌丝干品中的 DBP,并应用气相色谱-质谱联用仪对其进行分析测定。结果表明:(1)DBP 标准 线性回归方程为 y =26 021x - 74 798,R2=0.999 9,证明方法在 5.0 μg/mL ~ 100.0 μg/mL 范围内具有良好的线性关系。 实际样品加标回收率为 95.4 % ~ 105.0 %,平均回收率为 98.9 %,RSD 为 3.4 %。(2)在空白培养液中检测出一定含量 的 DBP,其浓度为 19.30 μg/mL。不同培养时间的培养液中 DBP 的浓度在 17.71μg/mL ~ 20.50 μg/mL 范围,相应培养时 间的竹荪菌丝中 DBP 的含量在 28.86 mg/kg ~ 33.52 mg/kg 范围。 竹荪菌丝在培养过程中, 能产生和释放一定量的 DBP,并也能一定程度地富集环境中的 DBP。
中文关键词: 竹荪 菌丝 气相色谱-质谱联用 邻苯二甲酸二丁酯(DBP)
Abstract:To study the effects of Dictyophora mycelium on the accumulation of dibutyl phthalate (DBP), and determine the content of DBP from it in different growth stages. Through the external standard method and stan- dard addition recovery experiment, the medium and blank medium as control groups, the DBP was separated from dried Dictyophora mycelium by ultrasonic-assisted solvent extraction method with ethyl acetate, and ana- lyzed by gas chromatography-mass spectrometry (GC-MS). The results showed that: (1) The regressione e- quation of calibration curve was y = 26 021x - 74 798, the correlative coefficient was 0.9999, and proof method had good linearity within 5.0 μg/mL - 100.0 μg/mL range. The actual recoveries were 95.4 %-105.0 %, the av- erage recovery was 98.9 %, and relative standard deviation was 3.4 %.(2) A certain amount of DBP was detect- ed from the extracts of blank medium, and its concentration was 19.30 μg/mL. The concentration of DBP from medium in different time was in the range of 17.71 μg/mL-20.50 μg/mL, and the concentration of DBP in the Dictyophora mycelium was 28.86 mg/kg -33.52 mg/kg during the corresponding culture time. Dictyophora mycelium can produce and release a certain amount of DBP during the culture process, and also enrich the DBP in the environment.
文章编号:201716028 中图分类号: 文献标志码:A
基金项目:国家自然基金项目地方基金项目(31160013);贵州民族大学科研基金资助项目(201415)
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