伏安法测定镀铜液中Fe^3＋和Cu^2＋离子的浓度

本文根据Fe~(3+)和Cu~(2+)离子在静止铂电极上的电化学还原特性,提出酸性镀铜液Fe~(3+)和Cu~(2+)离子浓度的快速测定方法。实验结果表明,Fe~(3+)离子阴极还原的电流值不因Cu~(2+)离子存在而受影响,因此可根据IRFe~(3+)～CFe~(3+)的关系测定镀铜液中Fe~(3+)离子的浓度。为避免Fe~(3+)离子对Cu~(2+)离子浓度测定的干扰,采用外加Nacl于待测溶液,则可由Cu~(2+)离子阴极还原的IR·Cu~(2+)～CCu~(2+)关系测定Cu~(2+)离子的浓度.     

薄层色谱法分离洗涤剂中几种主要表面活性剂的研究

本文主要研究用薄层色谱法分离洗涤剂中几种主要表面活性剂的展开剂及组份斑点的喷雾显色剂,同时还总结了在一定吸附层条件下,点样及展开时温湿度对组份Rf值的影响。     

高效液相色谱法分析四-(2-氯乙基)乙撑二磷酸酯阻燃剂

提出了阻燃剂的高效液相色谱(HPLC)分析条件,制备了纯组分,测定了校正因子,考察了方法的精密度和回收率。分析结果表明该合成产品已达到国外同类产品水平。     

Chemical States of Lanthanum in Carbonized La2O3-Mo Thermionic Cathode Materials

The chemical reaction between lanthanum oxide and molybdenum carbide was studied by thermodynamic calcu-lation, thermal analysis and in-situ X-ray Photoelectron Spectroscopy. The theoretical results show that at the environment allowing for the evaporation of lanthanum, such as in high vacuum, La2O3 in the La2O3-Mo materials can be reduced to metallic lanthanum by molybdenum carbide (Mo2C). To confirm the conclusion, many analysis methods such as XRD, SPS, and TG-DTA were taken. The experimental results show that the chemical state of lanthanum changes during heat-ing. It was proved, for the first time, that reacted metallic lanthanum appears at the surface of this kind of material at high temperature.     

离子色谱技术在钻井现场的应用研究

将离子色谱技术(IC)应用于钻井现场的钻井液滤液分析,从而获取所钻井钻遇地层的可溶性矿物的性质、地层水的类型等资料信息。离子色谱技术在这一领域的应用尚属探索阶段,但通过现场两口井的试用已见到较好的应用效果,文章简介了该技术的应用前景及价值,如:确定油水界面的位置及指导钻井液的调配、确保井下安全等。这方面的论述,对分析化验仪器向井场转移实现多手段综合分析具有一定的促进作用。     

烟用香料配制的气相色谱法质量控制研究

采用气相色谱法对香料房卷烟用料液中的溶剂及水分进行检测,分析测定其中的水分、乙醇、丙二醇、山梨醇等的含量,通过对香料房每批配制料液的抽检,可以跟踪料液配制的准确性,保证卷烟产品质量,该方法操作简单、准确性高、重现性好。