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Measurement of alkaline and earthy ions in fish otolith and sea water using a high performance ion chromatography

机译：高效离子色谱法测定鱼耳石和海水中的碱土离子

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Fish growth and the relation between growth and environmental conditions offer a good opportunity for measuring alkaline and earthy ions in fish otoliths. The analytical method must involve high sensitivity when attempting to discriminate between fish growth and environmental conditions. The aim of this paper is to propose a chromatographic method, with low detection limits, as a new approach in determining some important micronutrients present in sea water and fish otoliths. The work samples are: coastal, off-shore and sediment waters and fish otoliths (Engraulis encrasicholus, Mullus barbatus, Umbrina cirrhosa, Sciaena umbra, Pagellus erythrinus) in the Adriatic Sea and the Canal of Sicily. The analytical method includes an IONPAC CS12A chromatographic column and a 18 mM methanesulfonic acid eluent. The detection limit readings obtained with this method, for one E. encrasicholus fish otolith, weighing 2.6 mg are equal or inferior to 0.1 μg/L for lithium (Li), 59 μg/L for sodium (Na), 46 μg/L for ammonium (NH_4), 23 μg/L for potassium (K), 13 μg/L for magnesium (Mg), 88 μg/L for manganese (Mn), 2.567 μg/L for calcium (Ca) and 13 μg/L for strontium (Sr). The HPIC method minimizes overlaps such as Na on Li, and NH_4 in seawater and Ca on Mg and Sr in fish otolith. These elements are an essential constituent present in otoliths when describing the relation between growth and environmental conditions. Good separation among analytes is achieved within 16 min.
机译：鱼的生长以及生长与环境条件之间的关系为测量鱼耳石中的碱土离子提供了很好的机会。试图区分鱼类生长和环境条件时，分析方法必须具有很高的灵敏度。本文的目的是提出一种检测限低的色谱方法，作为测定海水和鱼类耳石中某些重要微量营养素的一种新方法。工作样品是：亚得里亚海和西西里运河的沿海，近海和沉积物水域和鱼类耳石（Engraulis encrasicholus，Mullus barbatus，Umbrina cirrhosa，Sciaena umbra，Pagellus erythrinus）。分析方法包括IONPAC CS12A色谱柱和18 mM甲磺酸洗脱液。用这种方法获得的检出限读数，对于一种重达2.6 mg的en鱼耳石耳，等于或低于锂（Li）的0.1μg/ L，钠（Na）的59μg/ L，钠（Na）的46μg/ L。铵（NH_4），钾（K）为23μg/ L，镁（Mg）为13μg/ L，锰（Mn）为88μg/ L，钙（Ca）为2.567μg/ L，钙为13μg/ L锶（Sr）。 HPIC方法可最大程度地减少重叠，例如Li上的Na，海水中的NH_4以及鱼耳石中的Mg和Sr的Ca。当描述生长与环境条件之间的关系时，这些元素是耳石中必不可少的成分。在16分钟内即可实现分析物之间的良好分离。

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