Study on the speciation of the Zinc in Grifola frondosa
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摘要: 目的:研究灰树花中锌的存在形态。方法:通过单因素实验和正交实验,优化了锌元素的提取工艺,对灰树花水提液中微量元素锌进行了含量测定和形态分析,采用0.45μm微孔滤膜和D-101型大孔吸附树脂将水提液中的锌分为悬浮态和可溶态、有机态和无机态,并采用微波消解-火焰原子吸收光谱法测定了Zn元素各形态的含量。结果:灰树花中锌元素的最佳提取条件为温度40℃,时间110min,料液比1∶45,在此条件下,可溶态中锌的提取率达到78.77%;水提液中可溶态大约占99.31%,可溶态中无机态和有机态分别占78.03%和22.39%。结论:灰树花中微量元素锌主要以无机态形式存在。
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关键词:
- 灰树花; /
- 锌; /
- 形态分析; /
- 微波消解; /
- 火焰原子吸收光谱法;
Abstract: Objective: To study the speciation of the Zinc in Grifolan frondosa.Methods: The working was analyzed by means of the single factor experiment and orthogonal experiment, extraction conditions were optimized and the content and speciation of trace element Zn in its water leaching were analyzed and discussed.By using 0.45μm filter membrane and D- 101 macroreticular resins, four different species of the water leaching, namely the suspended, the soluble, the inorganic and organic species were obtained and separated.In the test, the sample was digested by using microwave digestion system, and the content of the Zinc in those species were determined by FAAS, respectively.Results: The best extracting condition was the ratio of material and liquid was 1 ∶ 45, the temperature was 40℃, the extraction time was 110min, and the extraction rate 78.77% was obtained in this condition.The soluble Zn was about 99.31% in its water leaching, and the inorganic Zn and organic Zn was about78.03% and 22.39%, respectively.Conclusion: The trace element Zn in G.frondosa was existing mainly in form of the inorganic. -
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