| 摘要: |
| X射线分析显微镜(XGT-2000V, Horiba Co.，Japan，1993年制造)是一种新颖、快速的元素分析仪器，可以用来分析海藻中元素的组成特点。本研究对1997年4，5月在山东省威海市采集的22种海藻进行了研究，测定了海藻的Ⅹ射线荧光光谱(XRF)，并根据Ⅹ射线特性荧光的能量分析海藻的主要元素组成。然后采用基本参数法(FP法)对每种海藻的主要元素进行了半定量分析。研究结果表明，Ⅹ射线分析显微镜可以快速观测海藻中的主要元素如钾、硫、钙、铁、锌、溴、锶等，是研究元素组成与化学种态的有效的非破坏分析手段。从Ⅹ射线荧光光谱可以看出，绿藻的特征元素是钾、钙、硫，孔石莼(Ulva pertusa)含有较多的铁元素，而浒苔则含有较多的溴元素。褐藻的特征元素除钾、钙、硫之外，还含有较多的锶元素。另外，酸藻 (Desmarestia viridis)含有大量的硫及溴元素，鼠尾藻(Sargassum thunbergii)、单条髓藻(Myelophycus simplex)及酸藻 (Desmarestia viridis)中尚含有较多的铁元素。红藻的特征是多种红藻均含有较大量的溴元素，例如波登仙菜(Ceramium kondai)、松节藻(Rhodomela confervoides)、多管藻(Polysiphonia urceolata)、石花菜(Gelidium amansii)及亮管藻(Hyalosiphonia caespitosa)。另外，珊瑚藻(Corallina pilulifera)中含有大量的钙质。 |
| 关键词: 海藻元素、海藻、X射线荧光光谱 |
| DOI： |
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| 基金项目:中国科学院海洋研究所调查研究报告第3725号。 |
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| ELEMENTAL STUDIES ON MARINE ALGAE BY X-RAY ANALYTICAL MICROSCOPE PART Ⅰ. X-RAY FLUORESCENCE SPECTRA OF MARINE ALGAE |
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Yan Xiaojun1, Fan Xiao1, Tadahiro Nagata2
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1.Institute of Oceanology, Chinese Academy of Sciences;2.National Food Research Insititute, Tsukuba, Japan
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| Abstract: |
| As marine algae can very efficiently accumulate almost all of the elements (especially trace elements Such as iron, zinc, and iodine), studies on their element contents have a long history. Many analytical techniques including AES (Fan, et al., 1988, 1995), AAS (Ito, et al., 1987. 1988; Rao et al., 1989; Fan, et al., 1993) and NAA (Kawashima, et al., 1983) have been tried to determine the content and seasonal variations of inorganic elements in marine algae. Recently, more attention has been paid to fast and non-destructive analytical techniques, which can deepen the studies on chemical state analysis of elements (such as arsenic and iodine) and on the bioavailability of iron and calcium, sulfur or bromine containing organic compounds like fucoidans and bromophenols (Nisizawa, et al., 1979; Nisizawa, 1989; Oishi, 1993). In this work, the authors tried a new non-destructive and fast analytical method to study the element composition in 22 species of marine algae. |
| Key words: marine algae,X-ray fluorescence spectra |
