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离子色谱法实现了尿液中痕量F-的测定,使用溴化十六烷基二甲基铵为流动覆盖层的ODS柱。尿液中的许多无机和有机阴离子不影响F-的测定。 相似文献
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针对肥料中氟离子含量测定没有相关的标准,建立测定肥料中氟的离子色谱法。以水为浸提剂,超声波作用30 min,提取样品中的氟,采用30 mmol/L氢氧化钾溶液作为淋洗液,流量为1.2 m L/min,电导检测器检测氟离子的含量。结果表明:离子色谱法测定肥料中氟离子含量,线性相关系数(r2)大于0.999,线性范围0.1~2.0 mg/L,样品的加标回收率为96.7%~102.0%,具有精密度好、检出限低、操作简单、对环境无污染等特点,适用于肥料中氟离子含量的风险监测分析。 相似文献
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氟离子检测方法的改进及离子色谱法的应用 总被引:6,自引:0,他引:6
传统离子选择电极法分析氟离子容易被pH、金属离子和温度等因素所干扰,这样会使数据产生极大的误差。为了避免这些缺点,离子分离理论和高效液相色谱技术被应用在氟离子的分析-离子色谱法,离子色谱作为一种先进的检测手段在氟离子分析方面表现出优秀的准确性,重现性和可靠性。 相似文献
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介绍了ICS~1500离子色谱仪测定醋酸中痕量碘离子的分析方法;探讨了淋洗液、固定相、工作电位、样品前处理等对分析方法的影响;指出该分析方法快速、准确、重现性好。 相似文献
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Ionic liquids 总被引:2,自引:0,他引:2
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简述了离子液体的制备及在离子液体中进行的N.烷基化反应,比较传统合成方法,有时间短、产率高、污染小、易操作等优点. 相似文献
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TERRY A. MICHALSKE BRUCE C. BUNKER S. W. FREIMAN 《Journal of the American Ceramic Society》1986,69(10):721-724
Slow crack growth data, surface reaction studies, and solubility results for sapphire and magnesium fluoride crystals are used to identify stress corrosion mechanisms for each material. Results suggest that stress corrosion in sapphire proceeds by the dissociative chemisorption of environmental species on strained crack tip bonds. Crack growth rates measured in nonaqueous environments and isotopically labeled water suggest that ion solvation rather than dissociative chemisorption dominates the crack tip interaction in magnesium fluoride. 相似文献
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Supramolecular structures assembled via noncovalent interactions have found diverse applications in mechanical, biological, electronic, and manufacturing-related fields. Ionic interactions represent key noncovalent interactions, which can be used, for example, to create highly ordered, responsive, conductive, reversible, and/or viscoelastic supramolecular assemblies. The recent advances in the field of ionic supramolecular assemblies, including those prepared from polymers, small molecules, or a combination of the two are reviewed. The versatility and simplicity of constructing ionic supramolecular assemblies are illustrated through several examples. Finally, the outstanding issues and potential opportunities are discussed to stimulate critical discussions and encourage further discovery. 相似文献
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Ionic liquids in separations 总被引:5,自引:0,他引:5
Ionic liquids are liquids composed completely of ions. In the past two decades, ionic liquids have been widely used as "green solvents" replacing traditional organic solvents for organic synthesis and catalysis. In addition, ionic liquids are playing an increasingly important role in separation science. In this Account, the application of ionic liquids in all areas of separation science including extractions, gas chromatography, and supported liquid membrane processes are highlighted. 相似文献