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价态分析

价态分析的相关文献在1989年到2022年内共计104篇,主要集中在化学、冶金工业、原子能技术 等领域,其中期刊论文87篇、会议论文12篇、专利文献199727篇;相关期刊52种,包括岩矿测试、湖南有色金属、四川冶金等; 相关会议12种,包括第九届全国地质与地球化学分析学术报告会暨第三届青年论坛会议、中国核学会2011年年会、中国药学杂志岛津杯第九届全国药物分析优秀论文评选交流会等;价态分析的相关文献由248位作者贡献,包括邱林友、黄宝贵、代大煜等。

价态分析—发文量

期刊论文>

论文:87 占比:0.04%

会议论文>

论文:12 占比:0.01%

专利文献>

论文:199727 占比:99.95%

总计:199826篇

价态分析—发文趋势图

价态分析

-研究学者

  • 邱林友
  • 黄宝贵
  • 代大煜
  • 季申
  • 徐金华
  • 李丽敏
  • 汤志勇
  • LUO Ming-gui
  • 付泽晓
  • 何治柯
  • 期刊论文
  • 会议论文
  • 专利文献

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    • 石天池; 杨建锋; 杨保国; 曹园园; 马贵林
    • 摘要: 以宁夏北部富硒土壤为研究对象,分析耕作层土壤中硒的质量含量、赋存形态和价态.结果表明,宁夏北部农耕地富硒土壤呈大面积连片分布,土壤中硒的质量含量为0.02~1.80 mg/kg,平均值为0.26 mg/kg.土壤中7种形态硒的质量含量由大到小为残渣态、强有机结合态、腐殖酸结合态、水溶态、离子交换态、碳酸盐结合态、铁锰氧化物结合态,表现出高可利用态、潜在可利用态、低不可利用态的特征.土壤中水溶态和离子交换态硒分别以Se^(6+),Se^(4+)存在,不存在植物难以吸收的较低价态(Se,Se^(2-)).随着土壤pH值的增大,土壤中Se的总量呈降低趋势,在pH=8~9时硒的质量含量较高.
    • 薛佳
    • 摘要: 土壤重金属污染物的环境效应与其无机价态有密切的关系.As、Cr、Sb和Se元素的价态测定意义重大,但由于价态之间易发生转化使测定工作存在较大难度,标准化程度较低.地质行业标准DD2005-3推荐使用离子交换树脂分离,原子荧光光谱差减法测定As、Sb、Se价态及石墨炉原子吸收光谱法(GFAAS)测定Cr价态.这些方法前处理操作繁琐,测定次数多,工作量大,其他元素形态的存在还会导致结果出现误差.为满足地质调查和评价的需要,本文建立了一套适用于测定土壤水溶态和离子交换态提取液中As、Cr、Sb、Se价态的方法.样品在50°C水浴振荡加热浸提30min,采用液相色谱-原子荧光光谱法(LC-AFS)分离并测定As、Sb、Se价态,一次进样元素的两种无机价态按顺序出峰,同时测定,简便易行,结果更可靠.为了避免了某些离子交换提取剂的屏蔽和干扰,作为补充建立了AFS选择性测定Sb、Se价态的方法,设备成本较低.对于Cr价态的测定,建立了阳离子交换树脂分离-电感耦合等离子体质谱(ICP-MS)的方法,比推荐的GFAAS测定法灵敏度高.As、Cr、Sb和Se的检出限≤0.02μg/g,RSD为3.8%~10.7%,加标回收率为91.0%~106.0%.应用色谱方法对采集的土壤样品进行检测,各项指标满足规范DD2005-3质量要求,与非色谱法相比,实现多组分同时测定.同时初步研究表明,土壤中元素价态含量不高,与土壤总量不存在相关性,采用价态含量作为环境风险评估指标更为合适.
    • 葛晓鸣; 冯睿; 孙骥; 叶海雷; 金婉芳; 陈先锋; 马明; 彭锦峰
    • 摘要: 目的 建立一种超声辅助提取-高效液相色谱分离-电感耦合等离子体质谱联用法(high performance liquid chromatography-inductively coupled plasma mass spectrometry,HPLC-ICP-MS)测定食品中水溶性铬价态的分析方法.方法 样品经乙二胺四乙酸二钠(ethylenediaminetetraacetic acid disodium salt,EDTA-2Na)-硝酸铵混合溶液提取后,含蛋白质的样品加入铁氰化钾和乙酸锌溶液沉淀蛋白质,0.45μm微孔滤膜过滤后备用.样品经离子交换柱分离,ICP-MS检测.结果 Cr(Ⅲ)和Cr(Ⅵ)在0.5~50ng/mL的范围内呈线性关系,大米和鸡蛋样品在0.025、0.05和2.0 mg/kg添加水平下的回收率为76.8%~117.0%;土豆在0.025、0.05和1.0 mg/kg添加水平下回收率为84.7%~108.2%;牛奶在0.025、0.05、0.6 mg/kg添加水平下回收率为75.1%~103.8%; 2种价态的铬的检出限均为10μg/kg.结论 该方法快速、准确、灵敏,适合用于多种食品中可溶性铬价态分析检测.%Objective To establish a method for determination of water soluble chromium valence in foods by high performance liquid chromatography-inductively coupled plasma mass spectrometry (HPLC-ICP-MS) with ultrasound assisted extraction. Methods Samples were extracted with ethylenediaminetetraacetic acid disodium salt (EDTA-2Na) -ammonium nitrate mixture solvent. Protein-containing sample was added to potassium ferricyanide and zinc acetate solution to precipitate protein, and filtered through a 0.45 μm microporous membrane. The sample was separated by ion exchange column and detected by ICP-MS. Results Cr (Ⅲ) and Cr (Ⅵ) were linear in the range of 0.5-50 ng/mL. The recoveries of rice and egg samples at 3 spiked levels (0.025, 0.05 and 2.0 mg/kg) were 76.8%-117.0%. The recoveries of potatoes at 3 spiked levels (0.025, 0.05 and 1.0 mg/kg) were 84.7%-108.2%. The recovery rates of milk at 3 spiked levels (0.025, 0.05, 0.6 mg/kg) were 75.1%-103.8%. The detection limit of the two valence states of chromium is 10 μg/kg. The detection limit of chromium in both valence states was 10 μg/kg. Conclusion This method is fast, accurate and sensitive, which is suitable for the analysis and determination of soluble chromium in various foods.
    • 许乐; 李函彤; 逄晓阳; 张书文; 芦晶; 吕加平; 刘鹭
    • 摘要: Glucose tolerance factor (GTF) can effectively regulate sugar metabolism,improve the affinity of insulin to receptor,and improve fat metabolism.Up to now,its chromic value in GTF is unclear,which limited its application in reducing sugar health food.In this paper,extraction of GTF with ammonia and ethanol method from high chromium yeast was optimized.And then glucose tolerance factor (GTF) with high purity was obtained by two stages of gel chromatography.HPLC-ICP-MS was used to analyze chromium valence of GTF.The high chromium yeast was treated with 0.1 mol/L of ammonium for 4 h and then 30% of ethanol for 20 min.The total chromium in this extraction was 133 μg.Compared with ammonia extraction alone,the ratio of chromium to protein was increased by 6 times in this way.After extraction,glucose tolerance factor was purified by tow chromatography consecutively.The purified GTF was analyzed by HPLC-ICP-MS.Its chromatography showed that there was only one peak of chromium in this sample.It appeared in range from 31 s to 90 s,which was in agreement with standard of trivalent chromium.There-fore,it could be concluded that chromium in GTF exist in the state of trivalent.This will provide basis for research and development of high chromium yeast for dietary supplement.%酵母源葡萄糖耐量因子(glucose tolerance factor,GTF)可有效调节糖代谢、提高胰岛素与受体的亲和力、改善脂肪代谢.但GTF中的铬的价态不清严重限制了它在辅助降糖保健食品的中应用.实验优化了氨水联合有机溶剂提取GTF的方法.通过两级分子筛联用对GTF进行纯化,得到纯度较高的GTF.采用高效液相色谱(high performance liquid chromatography,HPLC)联用电感耦合等离子体质谱(inductively coupled plasma mass spectrometry,ICP-MS)技术对GTF中铬价态进行分析鉴定.结果表明,富铬酵母粉经0.1 mol/L氨水振荡提取4h后,上清液再经30%乙醇静置20 min,离心收集上清液.该粗提液中铬含量为133 μg,铬蛋白比为5.015;相比与氨水提取法(铬蛋白比0.804),氨水联合有机溶剂法的铬蛋白比提高了6倍,提取效率提高极大.GTF粗提液再经两级葡聚糖凝胶层析柱分离纯化,得到了一个与铬峰重合的蛋白峰.利用HPLC-ICP-MS对其进行铬价态分析,图谱显示GTF样品中铬出峰的时间为31 ~90 s,出峰时间与Cr(Ⅲ)的出峰时间一致,有且只有一个铬峰,GTF中的铬是以Cr(Ⅲ)形态存在,无Cr(Ⅵ)存在.该结果为GTF保健食品或安全膳食铬补充剂的开发提供了理论依据.
    • 薛超群; 郭敏; 张婵
    • 摘要: 在通过多种提取剂的提取能力实验比对后,选择以4 mol/L HCl为提取剂,50°C超声提取,用氢化物发生-原子荧光光谱法测定土壤样品中Te(IV)的含量,在HCl介质中,以TiCl3还原Te(VI),上机测定总Te含量,差减法可得出Te(VI)含量.共存元素的干扰可通过加入三价铁盐消除.在最佳仪器检测及酸度条件下对样品进行测定,此方法回收率为98.0%~110%,方法检出限可达到0.235 μg/L,相对标准偏差2.03%.经实验证实此方法提取效果良好,并具有简便、快速、灵敏度高等优点,有一定的生产实用价值.%After the comparison of the extraction ability of several extractants, an analysis method was established for the determination of Te (IV) in soil samples by hydride generation atomic fluorescence spectrometry. 4 mol/L HCl as the extraction agent in the experiment by ultrasound extraction at 50°C. Determination of total Te content in HCl media with TiCl3reduction Te(VI) and upper machine, then Te(VI) could be counted by subtraction. Eliminated the interference of coexisting elements by joining Fe (III). The recovery of standard addition was 98.0%-110%, and the detection limit was 0.235 μg/L, the relative stand deviation was 2.03%. Experiments showed good results and the method is simple, quick and high tensitivity. It will be of a certain practical value.
    • 田刚
    • 摘要: 以某铅锌冶炼厂废水为供试水样,探讨了氧化—沉淀法处理冶炼废水中铊的研究.结果表明,氧化—沉淀法处理冶炼废水中铊稳定可靠,是目前处理实际含铊废水主要的应急方法之一;在pH值为10,过氧化氢与废水的体积比为1∶10,硫酸铁用量为1.0 g/L(固液比),反应时间为30 min的工艺参数下处理冶炼废水,铊去除率可高达到99%左右,此法值得推广与实践应用.
    • 钟敏; 曾英
    • 摘要: Total vanadium and V5+content in soil were detected by PAR spectrophotometry and V4+content was analyzed by the decrement method to evaluate the toxicity and bio-availability of vanadium in the environment correctly.The results showed that the optimum conditions of extracting V5+from soil are 1:100 of soil/liquid ratio and boiling 15 min in Na2 CO3 with 0.1mol/L.The maximum absorption wavelength and optimum chromogenic time of V5+ are 540 nm and 30~120 min in PAR spectrophotometry respectively.The relative standard deviation (RSD)and adding standard recovery of V5+ content are 3.08%and 99.40%~ 109.37% respectively,which indicates that the optimum extract method is of easy operation and high accuracy.%为准确评价钒在环境中的毒性和生物有效性,以 Na2 CO3为提取分离剂,采用 PAR分光光度法和减量法分别测定土壤中总钒、钒(Ⅴ)和钒(Ⅳ)的含量。结果表明:土壤中钒(Ⅴ)的最佳提取条件为土液比1∶100,以0.1 mol/L 的 Na2 CO3煮沸浸提15 min。在弱酸条件下,PAR 分光光度法测土壤中的钒(Ⅴ)最大吸收波长为540 nm,最佳显色时间为30~120 min;钒(Ⅴ)含量测定结果的相对标准偏差为3.08%,加标回收率在99.40%~109.37%。方法操作简单,准确性较高。
    • 薛超群; 郭敏
    • 摘要: An analysis method was established for the determination of Se ( FV ) and Se ( VT) in soil samples by Hydride Generation-Atomic Fluorescence Spectrometry ( HG-AFS) , the key point being the selection of the extraction agent. In the past, there were so many kinds of extraction agents, but no pertinence. The extraction capacity of different extraction agents was compared and KH2PO4-K2HPO4 solution was selected for the experiment, which has a pH value of 8. 5. The total content of Se was measured by using 6 mol/L HC1 as reducing agent and being heated in a boiling water bath for 30 min. The content of Se ( IV ) was measured by the solution without heating in the boiling water bath. Finally, the content of Se( VI) was yielded by total Se content subtracted from the Se (IV). In the acidity condition of this experiment, the interference of coexisting elements was eliminated by adding Fe( HI ) salt. The relative standard deviation was 5. 0% - 12. 6% (re = 11) , linear range was 0. 00 -6. 00 |xg/L, the recovery was 90. 0% - 112. 5% and the detection limit was 0. 347 u,g/L. The method has been applied to determinate trace Se in reference materials and the results were in agreement with certified values. The results indicate that the method is simple, quick and highly sensitive. It is a feasible method to detect different valence states of Se in soil samples.%采用氢化物发生-原子荧光光谱法( HG - AFS)测定土壤样品中Se(Ⅳ)和Se(Ⅵ)时,提取剂的选择是技术的关键.以往的提取剂种类多且不具有针对性,本文对比了不同提取剂的提取能力,确定使用KH2PO4 - K2HPO4溶液(pH=8.5)为实验用提取剂,以6 mol/L HCl作为还原剂,沸水浴30 min后HG - AFS测定Se总量,不加热直接测定Se(Ⅳ)含量,以差减法得出Se(Ⅵ)含量.在本实验酸度条件下,加入三价铁盐,可消除共存元素的干扰.方法回收率为90.0% ~ 112.5%,线性范围为0.00 ~6.00 μg/L,相对标准偏差为5.0% ~ 12.6% (n=11),方法检出限可达到0.347 μg/L.标准物质的测定值与标准值相符.实验证实此方法提取效果好,是测定土壤样品中硒不同价态的可行性方法.
    • 方德安; 宋恩军; 张东
    • 摘要: 采用溶胶凝胶法制备氧化铝负载纳米钛酸锶(AST),并用扫描电子显微镜和X射线衍射仪进行表征.研究AST对水中Cr(Ⅵ)和Cr(Ⅲ)的吸附性能,考察吸附剂的再生及Cr(Ⅵ)和Cr(Ⅲ)的分离富集条件.结果表明:采用溶胶凝胶浸渍法,纳米钛酸锶粒子可牢固地负载于氧化铝表面,钛酸锶晶体平均粒径为22 nm.得到的新型纳米钛酸锶吸附材料对水中Cr(Ⅵ)和Cr(Ⅲ)均具有较强的吸附富集能力,但其吸附性能取决于介质的pH值,可通过改变介质的pH值,实现Cr(Ⅵ)和Cr(Ⅲ)的吸附分离.吸附于AST上的Cr(Ⅵ)和Cr(Ⅲ),可分别用洗脱剂洗脱,采用原子吸收光谱法分别测定,据此建立水中铬形态分离富集新方法.该方法用于水中Cr(Ⅵ)和Cr(Ⅲ)的分离富集和原子吸收测定,结果满意.%Nanometer-strontium titanate immobilized on aluminum oxide (AST) was successfully prepared by the sol-gel method and characterized using scanning electron microscope (SEM) and X-ray diffraction (XRD). By means of the determination of flame a-tomic absorption spectrometry (FAAS) , the adsorption characteristics of Cr ( VI) and Cr ( III) on the AST were investigated. The results show that the nanometer-strontium titanate was immobilized on the aluminum oxide firmly, gaining a new sort of adsorbent, and the average partied diameter of strontium titanate is 22 nm. At normal temperature, Cr ( VI) and Cr( III) can be separated through changing pH value of medium. Cr( VI) and Cr( III) adsorbed on the AST can be complete elution respectively. Cr(VI) and Cr( III ) were determined using FAAS. According to this, a new method was found to concentrate and separate rnchromium in water. The method has been applied to the preconcentration and separation of Cr( VI) and Cr( III) in water samples with satisfactory results.
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