电感耦合等离子体原子发射光谱法同时测定生铁中硅锰磷砷锑锡

本文研究了电感耦合等离子体原子发射光谱法(ICP-OES)同时测定生铁中常量元素磷、锰、硅及痕量元素砷、锑、锡。用盐酸-硝酸混合酸溶解试样,选择了各元素的合适分析谱线,在最佳工作条件下,测得磷、锰、硅、砷、锑、锡的检出限分别为0.0042%、0.0003%、0.0009%、0.0024%、0.0033%、0.0021%,相对标准偏差(n=10):常量元素磷、锰、硅及痕量元素砷的RSD小于2%,痕量元素锑和锡的RSD小于10%。本方法用标准物质进行测定,测定结果与认定值吻合。     

电感耦合等离子体发射光谱法同时测定高锰钢中硅、锰、磷、铬

本文采用(1+5)硝酸来分解高锰钢中硅、锰、磷、铬元素,并以ICP-AES法对其进行同时测定。方法的RSD为0.82~2.65,各元素的加标回收率为97.8%~108.0%。用标准样品进行对比测定,结果与标准值基本一致。     

ICP—OES法测定硅锰、锰铁合金中磷含量

应用ICP—OES法测定硅锰、锰铁合金中磷的含量,对试样前处理及分析方法的各种参数进行了优化,包括溶样酸的选择,分析谱线的选择,试样基体、分析酸度和干扰元素对测定结果的影响。通过各种分析参数的优化选择实现了硅锰、锰铁中磷的测定,取得了满意的效果。线性相关系数：P=0．9998,检测限为：0．030％。该分析方法准确快速,试剂用量少,线性范围宽,适用于硅锰、锰铁合金中质量分数为0．03～0．50％的磷测定。     

直读光谱仪分析法测定钢中碳、硅、锰、磷、硫的不确定度评定

直读光谱仪分析法检测钢中各元素含量已经在各炼钢、铸造、机械制造等部门广泛应用。本文对直读光谱仪分析法测定不确定度的产生原因进行了分析,并对钢材料中碳、硅、锰、磷、硫五种元素的不确定度进行了评定。     

三元素分析仪检测方法

元素分析仪是钢铁冶金行业为适应五大元素(碳、硫、锰、磷、硅)的现场在线检测分析的需要而发展起来的。检测碳、硫采用碳硫分析仪,检测锰、磷、硅采用元素分析仪(也叫三元素分析仪,3个通道分别预设固定波长检测锰、磷、硅)。三元素分析仪是采用光电比色分析原理,测定金属材料中的锰、磷、硅元素含量,它广泛应用于钢铁冶金、铸造、机械、化工、矿业等行业,是一种常用的检测仪器。     

电感耦合等离子体发射光谱仪测定铬镍合金中杂质元素

探讨了用电感耦合等离子体发射光谱仪测定铬镍合金中7种杂质元素锰、钛、磷、铜、铝、硅、铁的分析方法。通过试验确定了仪器最佳测定条件,利用基体匹配使该方法测定的杂质元素的加标回收率在98.9%～111.0%之间,RSD<1.09%,准确度和精密度好,可以满足分析要求。     

X射线荧光法分析中低合金钢

本文介绍了采用日本理学３５３０型多道Ｘ射线荧光光谱仪，测定中低合金钢中硅、锰、磷、镍、铬、铜、钼七元素含量，本方法用回归方法求取各元素检量线常数，对磷元素作基体校正，对钼元素作背景扣除，方法准确，快速简便，满足生产的需要。     

X射线荧光光谱压片法测定硅锰铁合金中Mn、Si、P等元素

从制样方法及分析方法上对硅锰铁合金的分析方法进行了研究,采用定时、定压、定量制样、标准曲线制作等手段,主要对硅锰铁合金中Mn、Si、P等常规元素进行试验,该方法分析数据准确可靠,操作简便快速,与化学分析方法对照,取得满意的分析结果。     

ICP-AES同时测定饲料中钙、铜、铁、镁、锰、钾、钠、锌和磷的含量

介绍了应用ICP-AES同时测定饲料中钙、铜、铁、镁、锰、钾、钠、锌和磷的含量。将试料经过高温消化处理后,直接用电感耦合等离子体发射光谱仪测量每个元素的谱线强度,并与同一元素标准溶液的谱线强度比较定量。     

电感耦合等离子体原子发射光谱法测定铬铁中的铬磷硅

用电感耦合等离子体原子发射光谱法(ICP-AES)测定铬铁中铬磷硅存在的问题是一些高碳铬铁、氮化铬铁等试样难以用酸溶解,在碱熔基体中,大量的易电离元素钠的存在使得测定困难,铬铁中高含量铬和微量的磷、硅等同时测定尤为困难。ICP-AES法同时测定铬铁中铬磷硅是一种新颖的方法。通过试验研究,确定了利用氢氧化钠-过氧化钠混合熔剂熔样的样品处理方法。在用ICP进行测试时,不同谱线所受到的干扰不同。推荐选择Cr 267.716 nm、Cr 206.158 nm、P 213.617 nm、Si 251.611 nm、Si 288.158 nm为分析线;对于干扰,采用基体匹配和两点校正法消除,方法的线性相关系数在0.995以上,磷的测试精密度在5.0%,铬、硅在1.0%以下;铬、硅检出限在0.006%以下,磷为0.002%。准确度试验表明,分析结果与推荐值和手工分析结果间的分析误差在试验允许的误差范围内。     

Optical properties of the metals Al, Co, Cu, Au, Fe, Pb, Ni, Pd, Pt, Ag, Ti, and W in the infrared and far infrared

Infrared optical constants collected from the literature are tabulated. The data for the noble metals and Al, Pb, and W can be reasonably fit using the Drude model. It is shown that -epsilon1(omega) = epsilon2(omega) approximately omega(2)(p)/(2omega(2)(tau)) at the damping frequency omega = omega(tau). Also -epsilon1(omega(tau)) approximately - (1/2) epsilon1(0), where the plasma frequency is omega(p).     

标准·质量·认证·会议(英文)

Standards IGRS:First Complete International Standards System in 3C Collaboration Field After ISO and IEC released three international standards of Intelligent Grouping and Resource Sharing (IGRS) including Core Protocol,File Communication Framework and Device Validation,four standards of IGRS,Application Framework,Basic Application,Service Types and Devices Types,got approved with high passing rate in the voting of Final Draft International Standard (FDIS) and will be officially issued soon around the world. It symbolizes that all     

抓管理重服务求可靠要效益--记广西计量测试研究所国家实验室认可工作

我所2001年9月份顺利地通过了中国实验室认可委紧张而严格的评审,得到了权威机构认可,成为西南地区较早通过国家实验室认可的省级计量校准机构.在建立质量体系、运行质量体系走过了艰辛之路,我们将全所职工的艰辛之路介绍给大家,希望能给将要申请认可的实验室得以参考.     

p,V, T and derived thermodynamic data for toluene,trichloromethane, dichloromethane,acetonitrile, aniline,and n-dodecane

Experimentally determined p,V,T data are reported for toluene, trichloromethane, dichloromethane, acetonitrile, aniline, and n-dodecane at 278, 288, 298, 313, and 323 K, except for dichloromethane, for which the highest temperature was 298 K. At each temperature, measurements were done at pressures up to about 280 MPa or (for aniline and n-dodecane) at a lower pressure slightly below the freezing pressure at the temperature of measurement. Values of the isobaric expansivity isothermal compressibility and (for toluene, trichloromethane, dichloromethane, and acetonitrile) internal pressure, derived from the p,V,T data, are presented.     

微波消解-ICP-AES法测定茶叶中钾、钠、磷、硫、铁、锰、铜、锌、钙、镁方法研究

通过优化微波消解条件,并根据不同元素性质,调谐ICP-AES工作条件至最佳,实现了茶叶中K、Na、P、S以及Fe、Mn、Cu、Zn、Ca、Mg 10种元素的同时测定。10种元素测定结果 RSD%为0.67(Cu)～5.57(Na),回收率为84.0%(Na)～101.5%(Fe),检出限为0.001(Mn)～0.029(S)μg·g-1,表明该方法准确可靠,能够满足茶叶中K、Na、P、S、Fe、Mn、Cu、Zn、Ca、Mg分析要求。     

Heterogeneous Equilibria in Aqueous Solutions of Uranovanadates Ak(VUO6)k·nH2O (Ak = H,Na, K,Rb, Cs,Tl, Mg,Ca, Sr,Ba, Co,Ni, Cu,Pb)

The state of mineral-like uranovanadates of mono- and bivalent metals in aqueous solutions was studied. Based on experimental solubility data, the reaction equilibria in the crystal uranovanadate-aqueous solution system were described quantitatively, which, in turn, allowed evaluation of the solubility products of uranovanadates and their standard Gibbs energies of formation and prediction of the solubility of these compounds in aqueous solutions of various compositions under the isobaric-isothermal conditions.     

Dry Autoclaving for the Nanofabrication of Sulfides,Selenides, Borides,Phosphides, Nitrides,Carbides, and Oxides

This review compiles various nanostructures fabricated by a distinct “dry autoclaving” approach, where the chemical reactions are carried out without solvents; above the dissociation temperature of the chemical precursor(s) at elevated temperature in a closed reactor. The diversity to fabricate carbides (SiC, Mo₂C, WC), oxides (VOx‐C, ZnO, Eu₂O₃, Fe₃O₄, MoO₂), hexaborides (LaB₆, CeB₆, NdB₆, SmB₆, EuB₆, GdB₆), nitrides (TiN, NbN, TaN), phosphides (PtP₂, WP), sulfides (ZnS, FeS/C, SnS/C, WS₂, WS₂/C), and selenides (Zn_1‐xMn_xSe/C, Cd_1‐xMn_xSe/C), with various shapes and sizes is accounted with plausible applications. This unique single‐step, solvent‐free synthetic process opens up a new route in the growing nanomaterials science; owing to its considerable advantages on the existing approaches.