An Ion Chromatography Method for the Determination of Major Anions In Geothermal Water Samples     

Merve Zeyrek  Kadriye Ertekin  Sibel Kacmaz  Cemil Seyis  Sedat Inan 《Geostandards and Geoanalytical Research》2010,34(1):67-77

A single-column suppressed ion chromatography technique was employed for the simultaneous determination of major and trace anions in sulfaterich groundwater samples. An analytical column, a self regenerating suppressor and sodium carbonate as the eluent were used to separate the anions. Method detection limits for the anions of interest were 10.4, 15.9, 36.8, 62, 60, 61 and 67 μg l⁻¹ for F⁻, Cl⁻, NO₂⁻, Br⁻, NO₃⁻, PO₄³⁻ and SO₄²⁻ respectively. The precision of the method was tested at five different concentration levels for each anion reference sample to evaluate the effectiveness of the method for groundwater analysis. Recovery studies were performed between two successive months by adding reference samples to the geothermal groundwater and drinking water samples. Precision was also assessed as the relative standard deviation of both repeatability (within-day) and reproducibility (between-day and different concentrations) for groundwater samples. Standard deviation and RSD values of 220 groundwater samples acquired over 8 months were evaluated. The suppressed ion chromatography technique was found to be a suitable method for determining major anions in sulfate-rich geothermal water samples.  相似文献   

Determination of Fluorine and Chlorine by Pyrohydrolysis and Ion Chromatography: Comparison with Alkaline Fusion Digestion and Ion Chromatography     

Qiaoyun Wang  Akio Makishima  Eizo Nakamura 《Geostandards and Geoanalytical Research》2010,34(2):175-183

A method to determine F and Cl in silicate materials by employing pyrohydrolysis and ion chromatography (IC) is described. Pyrohydrolysis involved mixing a pulverised sample (∼ 40 mg) with V₂O₅ (∼ 160 mg) and heating to 1100 °C under a wet oxygen flow in a quartz tube. Recovery yields of F and Cl were ∼ 97% using a NaF + NaCl standard solution. Detection limits of the pyrohydrolysis-IC method for silicate samples were 0.36 and 0.69 μg g^-1 for F and Cl, respectively. Fluorine and Cl concentrations were determined in the reference materials JB-2, JB-3 and JA-1 from the GSJ; BCR-2, BHVO-1, BHVO-2, AGV-1 and AGV-2 from the USGS; and NIST SRM 610, 612 and 614 glasses. Precisions (RSD) for determinations of F were 1–13% (except NIST SRM 614) and 2–19% for Cl, and were dependent on the concentration and blank correction. Most results obtained in this study were in good agreement with those of previous studies. In comparison, the Na₂CO₃ + ZnO fusion method at 900 °C showed that the yields of F and Cl by alkaline fusion systematically decreased with fusion duration time. The yields were 84% and 83% for JB-3, inferring that F and Cl were lost in this alkaline fusion.  相似文献   

深源花岗岩中的碳氢化合物   总被引：2，自引：0，他引：2  

曾贻善  刘家齐 《地球化学》2001,30(5):445-449

利用石油地球化学的溶剂抽提和气相色谱技术研究了北京延庆碓臼峪花岗岩（深源花岗岩）样品中的可溶有机质，同时用高温处理过的石英砂进行空白对比实验。结果表明，所研究的两个花岗岩样品中均存在少量的高碳数碳氢化合物，且具有相同的成分特征。这为自然界存在深源的长链碳氢化合物提供了新的证据，也为解释花岗岩浆演化晚期水热流体中短链羧酸的成因提供了线索。  相似文献   

微乳液毛细管电动色谱     

张五卷  赵云昆等 《岩矿测试》2001,20(1):37-42

从微乳液的组成、性质及其在高效毛细管电泳中的应用等几个方面论述了近8年来微乳液毛细管电动色谱的发展。  相似文献   

Coupling Size-Exclusion Chromatography and ICP-MS to Investigate the Speciation of Platinum-Group Elements in Environmental Samples     

Christoph M. Menzel  Zsolt Berner  Doris Stüben 《Geostandards and Geoanalytical Research》2001,25(2-3):239-251

The applicability of size-exclusion chromatography (SEC) coupled online with a high resolution ICP-MS (HR-ICP-MS) to investigate the speciation of the platinum-group elements (PGE), Rh, Pd and Pt, was evaluated. Experiments were carried out to determine the efficiency of different hydrophilic and hydrophobic size-exclusion gel materials to select the optimal eluent in respect of resolution, recovery, reproducibility and limit of detection. The suitability of HR-ICP-MS as a reliable detection instrument at low pg ml⁻¹ levels was investigated by examining possible mass interferences with Rh, Pd and Pt. Laboratory experiments demonstrated the interaction and capability of forming complexes of humic substances with PGE, demonstrating the potential role of these ubiquitous natural substances in the mobilisation of PGE in the environment.  相似文献   

钪（Ⅲ）的反相萃取柱色层新体系研究及应用   总被引：1，自引：0，他引：1  

谭龙华  唐祖光 《矿物岩石》1995,15(2):101-104

本文设计出钪（Ⅲ）的反相萃取柱色层新体系并加以应用。该新体系以聚四氟乙烯－７０１为载体，磷酸三丁酯（ＴＢＰ）为固定相，在１０ｍｏｌ·Ｌ￣（－１）盐酸中定量萃取层析钪（Ⅲ），用１０ｍｏｌ·Ｌ（－１）盐酸淋洗杂质元素，４ｍｏｌ·Ｌ（－１）盐酸解脱钪，经二甲酚橙光度法测定其回收率可达１００％。本法简便快速，选择性高，分离效果好，能用于岩石、矿物等物料中钪的定量分离、富集及测定。  相似文献   

离子色谱测定矿物流体包裹体浸取液中SeO_4~（2－）的方法研究     

Ma Yanlin  SunQizhi  SongQun  Guo Chunping 《吉林大学学报(地球科学版)》1994,(3)

研究了采用ＨＬＣ－６０１离子色谱仪双柱系统，电导检测器分离测定矿物包裹体浸取液中ＳｅＯ￣（２－）＿４与其它阴离子的方法。实验测得Ｓｅ（Ⅵ）的最小检测浓度为０．０５μｇ／ｍＬ，回收率为９６％～１０２％，相对标准偏差为０．５％。耐离子色谱法与极谱法分析结果进行比较，结果基本相符。  相似文献   

Photobleaching of humic rich dissolved organic matter   总被引：7，自引：0，他引：7  

Thomas?Brinkmann  Daniel?Sartorius  Fritz?H.?FrimmelEmail author 《Aquatic Sciences - Research Across Boundaries》2003,65(4):415-424

  相似文献   

离子色谱-六极碰撞等离子质谱法同时测定水样的砷形态     

张国平  刘丛强  黄荣生 《矿物学报》2004,24(4):325-328

经阴离子色谱柱分离，3mmol／L KH2PO4-K2HPO4(3％CH3OH改进剂)的淋洗液等梯度淋洗，用六极碰撞等离子体质谱仪在线测定了三种砷形态。检出限分别为：As(V)0．49μg/L，As(Ⅲ)0．39μg/L，DMA 0．16μg/L。重复性优于6．0％，三日复现性优于6．1％。为了检验该方法的实际应用性，测定了贵阳市饮用水源阿哈湖的湖水及入湖河水中的砷形态，结果比较理想。  相似文献   

High molecular weight (C_(35)~+) n-alkanes of high-waxy condensate and its source kitchen orientation in the Qianmiqiao burial-hill zone, Bohai Gulf Basin     

WANG Tieguan 《中国科学D辑(英文版)》2004,47(3)

Copyright by Science in China Press 2004 High-waxy condensate is a kind of special hy-drocarbon resources, i.e., the high molecular weight (HMW) alkanes, which usually appear in a solid wax fraction under normal temperature and pressure, but are dissolved by hydrocarbon gas as a high-waxy condensate of single gaseous phase under subsurface high temperature and pressure. Nevertheless, once produced in an oil-gas well, the subsurface condensate flows into the well-bottom, and then immediately …  相似文献