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《广东微量元素科学》2009,16(7):24-24
南京金陵微量元素与健康研究所用元素医学食疗法治疗冠心病、癌症、脑血管病、老年痴呆症、糖尿病、艾滋病、帕金森氏综合症、脑中风及其后遗症、小儿脑瘫、系统性红斑狼疮、癫痫、精神分裂症、血小板减少、肌痉挛、肌无力、肌萎缩、胆汁反流、偏头痛、前列腺肥大、性机能低下、不孕、不育、肝胆结石、脱发、斑秃、白瘢风、银屑病、再障贫血、血友病、白血病、荨麻疹、哮喘、风湿、类风湿、高(低)血压、高血脂、高血糖、高血沉、高尿酸、动脉硬化、骨质疏松、元素中毒症,地方病,遗传病等现代医学界束手无策的疑难病症,先后都获得了很好的疗效。 相似文献
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采用端视电感耦合等离子体原子发射光谱(ICP-AES)法同时测定玩具涂料中可溶性铅、镉、汞、砷、铬、锑、硒和钡.对仪器的工作参数和被测元素的分析谱线进行了优化和选择.铅、镉、汞、砷、铬、锑、硒和钡的检出限分别为0.006、0.0009、0.012、0.023、0.000 8、0.013、0.030和0.0006 mg/L.定量下限分别为0.99、0.15、2.0、3.8、0.14、2.2、5.0和0.10 mg/kg.相对标准偏差为0.76%~2.72%(n=8),加标回收率为96.0%~104.0%.该法适用于玩具涂料中铅、镉、汞、砷、铬、锑、硒和钡的快速测定. 相似文献
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建立STD/KED模式-电感耦合等离子体质谱(ICP-MS)法同时测定天然水体中铍、硼、钛、钒、铬、锰、钴、镍、铜、锌、钼、镉、锑、钡、铊、铅、铁、砷和硒19种元素的分析方法。仪器调谐校准后,样品在线加入锂、钪、铑、铋校准溶液校正,以标准曲线内标法定量分析。标准曲线相关系数均大于0.999,样品加标回收率为92.6%~103.6%,质控样品测定值相对标准偏差为0.20%~2.6%(n=6),方法检出限为0.01~0.70μg/L。该方法灵敏度高,操作简便,节省人力,能满足天然水体中19种元素的同时检测需要。 相似文献
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原子吸收光谱法测定水生生物体内铜、锌、镍、铬、铅、镉 总被引:7,自引:0,他引:7
用硝酸-高氯酸体系消解螺蛳和水葫芦样品,采用火焰原子吸收光谱法测定铜、锌、镍、铬,用石墨炉原子吸收光谱法测定铅、镉。铜、锌、镍、铬、铅、镉的检出限分别为0.328、0.126、0.271、0.416、0.006 64、0.001 15 mg/kg,线性相关系数不小于0.999 0,测定结果的相对标准偏差为1.1%~3.7%,加标回收率为86.0%~94.2%。 相似文献
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《理化检验(化学分册)》2009,(12)
《中国无机分析化学文摘》1984年创刊,本刊以文摘、简介及题录形式报道国内公开发行的有机无机分析化学的期刊300余种及各种会议论文集、新标准、新书目等,年收录文献4000篇左右。栏目分为:一般问题、重量法与滴定法、光度法、电化学分析、光谱分析、色谱分析、物相分析、气体分析、活化分析、质谱分析、分离方法、贵金属分析等。 相似文献
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颜卿 《广东微量元素科学》2009,16(7):38-38
人们都想了解和掌握必需微量元素和宏量元素含量丰富又配合较为均衡的蔬菜。据研究发现,在日常生活所食用的蔬菜中,含人体必需宏量元素和微量元素中等量同时配食较为均衡的蔬菜有20多种,它们是:白萝卜、胡萝卜、小白菜、小青菜、油菜、蕹菜、白茱苔、蒜苗、油角豆、马兰头、韭菜、苦瓜、芪椰菜、莴苣笋《茎》、山药、芦笋、蒜苔、藕、红辣椒、青辣椒等,这些蔬菜所含的人体必需微量元素如:Fe、zn、cu、se等和人体必需宏量元素如K、Na、Ca、Mg等的含量都是比较均衡的,为人们日常调配饮食, 相似文献
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新一代萃取分离技术──固相微萃取 总被引:57,自引:2,他引:55
介绍了一种新型样品制备法——固相做萃取(SPME)的原理及其应用。与其它样品制备技术相比,SPME法具有操作时间短、样品量小、无需萃取溶剂、适于分析挥发性与非挥发性物质、重视性好等优点。 相似文献
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A new design of a mass-flow controlled multidimensional switching system for capillary gas chromatography is introduced and discussed. Large sample amounts can be introduced with a required input band width onto the first column. A combination of cold sample introduction and successive high speed programmed heating of the injector liner is used for this purpose. The potential of such an approach for selective and fast high resolution separations with series coupled wide bore, thick film columns is emphasized, and illustrated for various concentrations. 相似文献
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It is shown that a wide range of cast irons can be analysed on one calibration if the sample surfaces are prepared to a mirror finish with diamond paste. Polishing the samples with any abrasive material results in preferential removal of the softer constituents from the sample matrix. If coarser abrasives than diamond paste are used, the increased depth of the introduced sample inhomogeneity leads to unacceptable error limits for the determination of light elements. 相似文献
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A new method of mixing sample and reagent due to the difference in their electrophoretic mobilities is introduced. Unlike electrophoretically-mediated microanalysis, sample and reagent are injected from the opposite ends of a capillary tube. This method is compared with electrophoretically-mediated microanalysis. Experiments are performed showing the possibilities of this new method. 相似文献
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The performance of an integrated capillary electrophoresis system with a novel split-flow sample injection mechanism and special high sensitivity UV absorbance detector is described. Sample introduction into the capillary is accomplished with a standard HPLC-type microliter syringe. The injected sample is divided proportionally between the separation capillary and an adjustable splitvent. The volume of sample introduced into the capillary can be manipulated by varying the length or the i.d. of the splitvent tubing; or the volume of sample injected. Data are presented showing reproducibility of retention time, peak height, and peak area; minimum detectability; and operation at short UV wavelengths. 相似文献
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A simple and accurate method is presented for determining barium in marine waters. Equal amounts of an enriched isotope spike and sample are diluted 100-fold with 1% nitric acid. The diluted sample is introduced into an inductively coupled plasma mass spectrometer with a peristaltic pump and the mass region from 135 to 138 is scanned 480 times. The entire procedure takes less than 10 min per sample and is accurate to better than 1% as determined by intercalibration with isotope dilution mass spectrometry. 相似文献
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Miniaturized sample preparation methods designed as the sample pretreatment for liquid phase separations, such as liquid chromatography, capillary electrophoresis and capillary electrochromatography, have been reviewed especially for the on-line coupling of the sample preparation process and the separation process. The development of the desorption interfaces for the effective combining of the sample preparation and subsequent liquid phase separations is briefly described along with the applications of the combined analytical systems to the analysis of complex sample mixtures such as biological and environmental matrices. Novel use of fine polymeric filaments as the extraction medium for microscale liquid phase separation methods are investigated and a comparison is made with other sample preparation techniques. Polymer coating onto the fibrous material is also introduced to further develop microscale sample preparation methods with improved extraction performance. Several other microscale sample preparation methods having a potential compatibility to the liquid phase separations are also described for future applications of these techniques. 相似文献
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Jnn'ichi Toei Keizen Fujii Nobuyuki Baba 《Fresenius' Journal of Analytical Chemistry》1989,334(1):13-15
Summary A new type reaction valve for flow injection analysis has been developed. In a FIA system with this valve the injected sample is once passed into a loop of the valve, thereafter the valve is rotated to the next position. Therefore, the sample is retained in the loop in a stop-state for a long time and the next sample is introduced into another loop in the next position. When the valve is rotated for one round, the stopped sample in the fist loop is again passed into the detector flow cell. Thus, an analysis, which needs a long reaction time, can be performed with this valve with high precision.
Verbessertes Reaktionsventil für die Flie\injektionsanalyse相似文献
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An automatic sampling device has been developed for capillary zone electrophoresis. The sample is introduced to the column electrokinetically by rapidly exchanging buffer for sample in a narrow channel drilled in a plexiglass block. The autosampler is capable, under computer control, of performing multiple sample injections from a large volume sample source (such as a reaction vessel) as the sample concentration changes, and thus presents the possibility of analyzing time-varying processes by CZE. Peak area reproducibility in electropherograms obtained after use of the sampler is less than 1% and efficiency is more than 2.2 × 105 theoretical plates. 相似文献
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影响离子色谱测量准确性的因素 总被引:2,自引:0,他引:2
介绍了离子色谱测量过程中色谱条件的变化、样品前处理方法和操作过程等因素对测量结果准确性的影响,提出了相应的解决措施和校准方法.以实际样品测定为例介绍了样品前处理过程中待测组分浓度和形态的变化,对定量分析结果造成的误差及修正方法. 相似文献