共查询到19条相似文献,搜索用时 78 毫秒
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一、概述 1975年美国Dow chemical公司Small等报导了用自动电导检测的离子交换色谱法,首次实现了阴、阳离子和有机阴离子的分离及检测。随着高效液相色谱技术的引入,又促进了它的发展,所以人们也将离子色谱法称为液相色谱技术的分支。尽管如此,由于离子色谱法具有独特的发展过程,因而离子色谱法仍然作为色谱技术的重要分支而存在。 相似文献
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分析仪器联用技术的发展动向 总被引:1,自引:0,他引:1
分析仪器联用技术已在环境样品分析中得到应用,并有广阔的发展前景。本文介绍了色谱-色谱、色谱-原子光谱、离子色谱联用技术、色谱-质谱、色谱-傅立叶变换红外光谱、色谱-核磁共振波谱(NMR)联用技术在分析环境样品方面的应用。 相似文献
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离子色谱技术在环境监测中的应用 总被引:5,自引:0,他引:5
袁英贤 《环境监测管理与技术》1997,9(3):14-16
详细介绍了离子色谱仪的构造,功能,以及离子色谱技术的发展状况,离子色谱作为一种新的分析方法以其独特的优点可广泛应用于水,气,土壤,生物等环境监测领域。 相似文献
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水中消毒副产物(DBPs)是在水消毒过程中消毒剂与水中溶解性有机物以及无机离子发生反应而产生,其对水环境生态安全和人体健康有不利影响。简述了DBPs的生成、种类、毒性和分析方法等,重点综述了气相色谱-质谱联用(GC-MS)、液相色谱-质谱联用(LC-MS)、离子色谱-质谱联用(IC-MS)以及超高分辨率质谱(UPMS)等质谱(MS)及其联用技术在水中DBPs识别和分析中的应用,分析了不同MS技术的特点和应用实例,提出了MS技术在DBPs研究领域的发展方向与挑战。 相似文献
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离子色谱预处理是离子色谱分析测定过程中必不可少的重要环节,只有通过正确的预处理才可能使测定结果准确无误。在多次实验分析和总结的基础上,提出精确的确定预处理量、次数与实验分析准确性的关系。在预处理柱内通过3倍柱体积以上的样品后,可以保证实验数据的准确性和精密度。为离子色谱的精确测定提供了可靠的操作依据与指导。 相似文献
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Ion chromatography (IC) is now a well-established methodology for the analysis of ionic species. The technique is applicable to the determination of a wide range of solutes in many sample types, although the determination of inorganic ions in potable waters continues to be the most widely used application of ion chromatography. Many standardization and regulatory bodies, such as the American Society for Testing and Materials (ASTM), International Organization for Standardization (ISO), and US Environmental Protection Agency (EPA), have approved methods of analysis based upon IC, most of which have been published within the last decade. Recent developments in the field of IC, such as the use of higher capacity columns, larger loop injections, more complex sample preparation and detection schemes, have been incorporated into these new approved methods. These advances allow the determination of environmentally significant contaminants, such as common inorganic anions, bromate, perchlorate and chromate, at trace levels in potable waters using ion chromatography. 相似文献
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水体环境中氟化物的测定方法研究 总被引:1,自引:0,他引:1
利用离子选择电极法和离子色谱法,比较测定了饮用水、景观水及地表水水体中氟化物的含量,发现对污染程度不同的水体两种方法表现出不同的优势,可以指导分析人员根据水体污染程度选择相应的检测方法。 相似文献
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建立了用离子色谱法测定有组织废气和无组织废气中丙酸的新方法,常规无机阴离子对该方法的测定没有干扰。对实际废气样品进行分析,丙酸的回收率分别为91.5%~106%。该方法分析速度快,所需样品量少,且无需复杂的前处理,简便、灵敏、可靠。 相似文献
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丁基黄原酸是水质监测的重要项目之一。水中丁基黄原酸的测定,在样品采集保存、前处理及仪器分析各阶段都存在一定的技术难点。实际分析时很容易出现测定结果不理想,甚至定性定量错误等问题。结合实验对丁基黄原酸测定中容易出现的问题及注意事项进行探讨,正确区分丁基黄原酸及其盐,有效保存样品,采用低损失的前处理方法以及选择性好的分析仪器,有利于提高丁基黄原酸测定的准确性。众多丁基黄原酸测定方法中,液相色谱质谱法、离子色谱法以及液相色谱法在选择性和灵敏度方面更具优势,也可用于其他方法检出丁基黄原酸时对测定进行确认。 相似文献
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用离子色谱法测定环境空气中低浓度氯化氢,是通过测定氯离子质量浓度间接测定氯化氢的质量浓度,测定过程极易受外来氯离子的干扰,使空白值偏高。通过试验确定测定过程中可能存在氯离子干扰的环节,并采取一系列方法消除前期准备、采样和分析全过程中的干扰,以降低空白值。 相似文献
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梯度淋洗离子色谱法测定饮用水中6种阴离子 总被引:1,自引:0,他引:1
采用离子色谱法同时测定饮用水中F-、Cl-、Br-、NO3-、SO24-、PO34-等6种阴离子,水样经0.22μm滤膜过滤,自动淋洗发生器产生20 mmol/L~40 mmol/L KOH淋洗液梯度洗脱,在流量0.25 mL/min条件下采用IonPac AG19保护柱和IonPac AS19分离柱分离和定量。方法线性良好,6种阴离子的检出限为0.005 mg/L~0.057 mg/L,标准溶液平行测定6次,测定值的RSD在0.5%~2.2%之间,水样加标回收率在83%~106%之间。 相似文献
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Claeson AS Levin JO Blomquist G Sunesson AL 《Journal of environmental monitoring : JEM》2002,4(5):667-672
Growth of different microorganisms is often related to dampness in buildings. Both fungi and bacteria produce complicated mixtures of volatile organic compounds that include hydrocarbons, alcohols, ketones, sulfur- and nitrogen-containing compounds etc. Microbially produced substances are one possible explanation of odour problems and negative health effects in buildings affected by microbial growth. A mixture of five fungi, Aspergillus versicolor, Fusarium culmorum, Penicillium chrysogenum, Ulocladium botrytis and Wallemia sebi were grown on three different humid building materials (pinewood, particle board and gypsum board) and on one synthetic medium. Six different sampling methods were used, to be able to collect both non-reactive volatile organic compounds and reactive compounds such as volatile amines, aldehydes and carboxylic acids. Analysis was performed using gas chromatography, high-performance liquid chromatography and ion chromatography, mass spectrometry was used for identification of compounds. The main microbially produced metabolites found on pinewood were ketones (e.g. 2-heptanone) and alcohols (e.g. 2-methyl-1-propanol). Some of these compounds were also found on particle board, gypsum board and the synthetic medium, but there were more differences than similarities between the materials. For example, dimethoxymethane and 1,3,5-trioxepane and some nitrogen containing compounds were found only on particle board. The metabolite production on gypsum board was very low, although some terpenes (e.g. 3-carene) could be identified as fungal metabolites. On all materials, except gypsum board, the emission of aldehydes decreased during microbial growth. No low molecular weight carboxylic acids were identified. 相似文献
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通过对离子色谱法测定降水中F^-、Cl^-、NO3^-、SO4^2- 测量不确定度的分析,找出导致不确定度的因素。对测量不确定度进行计算和评定,结果表明,影响其测量不确定度的主要因素是标准曲线精密度。 相似文献