ARL9800 X射线光谱仪测定烧结矿中氧化亚铁

介绍了用瑞士ARL公司生产的ARL9800X射线光谱仪中配置的X射线衍射（XRD）通道测定烧结矿中氧化亚铁含量，该方法简便，快速，准确，当浓度为10．56％时，相对标准偏差为0．28％。     

超高效液相色谱法测定原料乳中的水杨酸

建立了原料乳中水杨酸的检测方法.样品经乙腈提取，采用超高效液相色谱进行测定.在ZORBAX Eclipse Plus C18反相柱上分离，梯度洗脱，流动相为磷酸水和磷酸甲醇，DAD检测.水杨酸的线性范围为0.5~20 μg/mL，相关系数平方（R²）大于0.995，检出限为0.5 mg/kg，定量限为1.25 mg/kg，3个不同水平的加标回收率为88.0%~118.9%，相对标准偏差不大于10%.方法具有操作简单、重现性好、灵敏度高、杂质干扰小等特点，可以用于原料乳中水杨酸的检测.     

Non-surfactant synthesis of mesoporous silica with dye as template

A novel non-suffactant method was described to synthesize mesoporous silica using dye basic fuchsin as template.Chemical reactions were introduced into the formation of mesopores rather than the weak electrostatic or hydrogen-bonding interactions in the traditional surfactant routes.The reactant composition was found to be crucial to the pore structure of objective product.The formation mechanism of mesopore was also proved.     

The Erosion and Erosion Products of Tungsten and Carbon Based Materials Bombarded by High Energy Pulse Electron Beam

High Z and low Z materials are both the candidate plasma facing materials (PFM), up to now, the typical representative of high Z materials is tungsten, and the representatives of low Z materials are carbon materials (such as graphite, C/C composite) and beryllium. Most of these materials have been used as PFM limiters and diverter armor tiles of tokamak machines, tungsten, molybdenum and C/C composite are always used as high heat flux components.     

9项原料乳及乳制品检测方法获认定

围绕乳制品安全生产，河北省科技厅加强质量安全控制关键技术研究，先后启动“华北农区高产奶牛良种繁育体系建立与奶业规模化生产技术研究”和奶制品检测技术、产品的研发项目10余项。     

Effects of BaF2 on Preparing Mullite with Sludge from the Aluminum Profile Factory and Pyrophyllite

In this study, sludge from the aluminum profile factory and pyrophyllite were used as major raw materials to prepare mullite. Through determining optimum formula, the optimum calcination temperature and optimum temperature retention time as well as the effects of BaF2 mineralizer on the crystal structure, microstructure and properties of mullite were studied and the optimum BaF2 mineralizer dosage was determined. With XRD and SEM methods, the crystal structure and microstructure of each sample were characterized. With Rietveld Quantification method, crystal phase content in each sample was determined and properties of each sample were tested. Based on the comprehensive analysis result, it was determined that optimum BaF2 dosage was 0.5%, the fairly good calcination temperature was 1550 ℃, and the corresponding mullite solid solution content was 95.8%.     

锐钛型TiO2性能研究Ⅰ.影响化纤钛白原料性能的因素

ＴｉＯ２能使带有强烈脂肪光泽的化学纤维得到永久性的消光，这类特殊ＴｉＯ２称为化纤钛白。考虑到化纤钛白用途的特殊性，化纤中只能用锐钛型ＴｉＯ２，同时对化纤钛白要求白度高、在水中具有很高的分散性、在乙二醇中大于５μｍ的凝聚粒子要少。化纤钛白作为钛白的专用...     

基于固相萃取－响应面优化的碳骨架在线催化/GC－MS/MS技术测定含油金属原料表面痕量氯污染物

采用碳骨架在线催化/气相色谱－串联质谱（Online catalytic/GC－MS/MS）技术建立了进口含油金属原料中多氯联苯（PCBs）、多氯萘（PCNs）、短链和中链氯化石蜡（SCCPs、MSCCPs）等含氯污染物的测定方法,考察了固相萃取（SPE）条件,研究了催化剂的制备、在线催化温度、氢气流速及氯化程度等对催化效率的影响,并运用三维响应面法优化催化条件。样品通过自制催化衬管在线脱氯加氢,目标物经催化后转化为碳骨架不变的正构烷烃和芳烃化合物,采用多反应监测模式进行检测。10种还原产物在0.02 ~ 1.00 μg/mL质量浓度范围内与其对应的峰面积呈线性关系,方法定量下限为0.26 ~ 5.33 μg/kg。样品的加标回收率为87.2% ~ 111%,相对标准偏差（RSD,n = 6）不大于7.1%。该方法催化快速、灵敏度高、准确性好,无需化学电离源或高分辨气相色谱－质谱仪即能达到较低的检出限,适用于含油金属原料中氯污染物的测定。