ICP-AES测定镁合金中Nd、Al、Ni、Cu、Be、Zn、Mn、Ce和Si等9种元素

采用ICP-AES测定了镁合金中的Nd、Al、Ni、Cu、Be、Zn、Mn、Ce、Si9元素,进行了溶解试验、酸度试验和氢氟酸用量等试验,研究并校正了基体及共存元素对测定元素的干扰,测定值与标钢原值符合较好,低含量范围元素(<0.001mg/mL)的相对标准偏差RSD<10%;较高含量元素(0.001mg/mL)的相对标准偏差RSD<2%。方法简便、快速、可靠,可获得满意的分析结果。     

ICP-AES测定RA合金中铝、镉、铜、铁、铅、锰和硅含量

电感耦合等离子体-原子发射光谱法直接测定RA合金中Al、CA、Cu、Fe、Pb、Mn和Si等元素含量.优选了适宜的仪器测定参数和分析谱线.方法简便快速.回收率在97%-103%之间,相对标准偏差(RSD)<5%.     

微波消解ICP-MS测定冬虫夏草中铜、铅、砷和镉的含量

采用微波辅助消解冬虫夏草样品,用ICP-MS测定冬虫夏草中铜、铅、砷和镉4种重金属元素的含量,该方法简便,快速,可同时测定多元素,精密度好,回收率96%—103%,满足规范要求。     

ICP-AES同时测定满山香子中的铜、铁、锌、钙、镁、锰和钴

电感耦合等离子体发射光谱法 (ICP- AES)测定中药满山香子中的铜、铁、锌、钙、镁、锰、钴等 7种元素的含量。研究了样品溶解酸、元素分析线的选择。各元素测定的相对标准偏差为 1.6 0 %— 6 .38% ,加标回收率为 97.0 0 %— 10 5 .0 0 % ,方法方便、可靠 ,具有良好的准确度和精密度。     

ICP-AES测定微硅粉中Ca、Mg、Fe和Al的含量

微硅粉样品经氢氟酸、硝酸、高氯酸消解,电感耦合等离子体-原子发射光谱法（ICP-AES）测定Ca、Mg、Fe、Al杂质元素含量。方法的回收率为：Ca 95.2%—100.3%,Mg 96.2%—99.6%,Fe 95.8%—97.2%,Al 98.6%—104.6%,精密度在1.50%—2.59%之间。本方法线性范围宽、分析效率高、具有良好的准确性和精密度,能快速准确地测定微硅粉中Ca、Mg、Fe和Al杂质元素的含量。     

ICP-AES测定岩盐中钾、钠、钙和镁的含量

用ICP-AES测定岩盐中钾、钠、钙和镁的含量,操作简便、快速,可同时测定多元素,结果准确。精密度小于2.11%,回收率为97.2%—102.0%,满足规范要求。     

航天诱变育种板蓝根的X射线荧光光谱的测定分析

采用X射线荧光光谱法(XRF)对航天诱变育种第4代板蓝根和地面组板蓝根的元素种类和含量进行测定和对比分析。结果表明两组样品的元素种类基本相同,太空组中Ca和S含量分别提高了1.16倍和3.22倍,而太空组中Fe、Si、Cr、Al、Mn元素比地面组分别减少了74.2%、87.5%、82.4%、95.0%、70.6%。航天诱变育种可以增加板蓝根的多态性,能够从中选育出品质特异的新品种。XRF测定中药材元素具有制样简单、测定快捷、测定元素种类多、元素含量范围广的特点,适于从整体上对中药材的元素进行测定和分析。     

ICP-AES同时测定涂料中镉、铬、钴和铅

系统研究了样品灰化条件对涂料中重金属元素测定结果的影响 ,建立了 ICP- AES法同时测定涂料中镉、铬、钴、铅元素含量的方法 ,方法的线性范围为 5— 10 0 0μg/ g,检出限为 0 .1— 0 .99μg/ g,相对标准偏差为 1.5 %— 9.9% (n=7) ,加入回收率为 97.0 %— 10 1.0 %。     

电感耦合等离子体-原子发射光谱法测定红景天中锌、铁、锰和钛

用电感耦合等离子体-原子发射光谱法测定红景天中锌、铁、锰和钛等元素。使用与分析样品基体相接近的标准样品和控制一致的测定条件,克服了物理干扰和基体效应的影响,选择波长为233.0,273.9,257.6,334.9nm4条谱线分别作为测定锌、铁、锰和钛的分析线,测得4种元素的检出限(3s)为0.004—0.05μg/mL。本法测定红景天中4种金属元素的含量,相对标准偏差(n=7)在2.2%—4.2%之间,加标回收率在96.4%—115.2%之间。     

鱼中铅、镉、汞和砷的测定

采用二种消化方法并用原子吸收分光光度法和原子荧光光谱法测定了鱼肉和鱼肝中铅、镉、汞、砷的含量。改进了国标每种元素需要一种方法测定的不足。结果表明在污染的河水中鱼肉的重金属元素含量比河水中的高,在同一条鱼中鱼肝中的重金属元素含量比鱼肉中的高。测定值与国标测定值以及标准物质推荐值一致。该方法快速、简便、准确。     

ICP-AES法直接测定锡锭中的As、Al、Bi、Cd、Cu、Fe、Pb、Se、Sb、Zn

以电荷耦合器件为检测器的全谱直读等离子体光谱仪直接测定锡锭中As、Al、Bi、Cd、Cu、Fe、Pb、Se、Sb、Zn十种杂质元素的含量.该方法简便、快速且具有比化学法更低的检出限,加标回收试验结果表明,回收率为92%-105%,RSD均小于1.5%.     

ICP-AES法测定金属硅中的Al、B、Ba、Ca、Cr、Cu、 Fe、Mg、Mn、Ni、Sr、Ti、V和Zn杂质元素

本文提供了一种测定金属硅中Ｂ,Ｆｅ,Ａｌ,Ｃａ,Ｍｎ等１４个杂质元素的ＩＣＰ－ＡＥＳ方法,在样品处理过程中,加入适量体积的甘露醇能够抑制Ｂ的挥发。用本方法测定了一个国家地球化学标准样（ＧＳＲ－４）,结果令人满意。     

Solution absorption and luminescence studies of tetraphenylboron, -carbon, -silicon, -germanium, -tin, -lead, -phosphorus, -arsenic,and -antimony

The lowest absorption band of the tetraphenyl compounds resembles that of the lowest absorption band of benzene with the following difference. In benzene the electronic origin is strictly forbidden, and all intensity is associated with a symmetric progression built on one mode of asymmetric vibration. In the tetraphenyl compounds the intensity associated with the asymmetric vibration is relatively unaffected; however, there is increasing intensity associated with the electronic origin and a symmetric progression built on it along the series

$\text{φ}{}_4\text{Pb}\text{< φ}{}_4\text{Sn}\text{< φ}{}_4\text{Ge}\text{< φ}{}_4\text{Si}\text{< φ}{}_4\text{C}\text{? φ}{}_4\text{B}{}^{\mathrm{?}}\text{< φ}{}_4\text{Sb}{}^{\mathrm{+}}\text{< φ}{}_4\text{As}{}^{\mathrm{+}}\text{< φ}{}_4\text{P}{}^{\mathrm{+}}$

. For the cations it is the electronic origin and the progression built on it that are the primary source of intensity. This effect is attributed to an inductive perturbation. A similar effect is observed in the fluorescence spectrum. In phosphorescence, the relative enhancement of the electronic origin and the progression built on it is far less marked. The phosphorescence emission of φ₄Pb and φ₄Sb⁺ are red shifted from the others by ～0.5 eV, an effect attributed to formation of a triplet excimer. Increasing spin-orbit coupling in the triplet due to a heavy atom effect can be seen in the decreasing phosphorescence lifetime (range 4 sec to 4 msec) and decreasing ratio of $\text{φ}{}_{\mathrm{f}}\text{φ}{}_{\mathrm{p}}$ (fluorescence to phosphorescence quantum yields) in the order

$\text{φ}{}_4\text{C}\text{> φ}{}_4\text{B}\text{> φ}{}_4\text{Si}\text{> φ}{}_4\text{P}{}^{\mathrm{+}}\text{> φ}{}_4\text{Ge}\text{> φ}{}_4\text{As}{}^{\mathrm{+}}\text{> φ}{}_4\text{Sn}$

In all cases nonexponential decay of phosphorescence is observed.     

纯硒中杂质元素的ICP-AES测定

电感耦合等离子体-原子发射光谱同时测定纯硒中的碲、铅、铋、锑、铜、铁、镍、铝、锡、砷和硼12种元素的含量,优化出各元素的分析波长和分析条件;用基体匹配补偿基体效应,方法简单,快速可靠,样品回收率为94%-107%.     

Measurement of X-ray production cross-sections of Ti,V, Cr,Mn, Fe,Co, Ni and Cu molecules

K shell X-ray production cross-sections in the Ti, V, Cr, Mn, Fe, Co, Ni, and Cu in the molecules were studied at 59.5 keV excitation energy by using a Si(Li) detector ( FWHM = 155 eV at 5.96 keV). The present results are compared with other theoretical values.     

ICP-AES测定铝合金中Mg、Be、Mn、Mo、Fe、Ti、Si和Zn

采用ICP-AES同时测定铝合金中合金元素和杂质元素,优化ICP光谱仪的工作条件,测定回收率96%-106%.RSD 0.28%-6.26%,结果令人满意.     

Equations of state for copper,silver, gold,aluminum, nickel,and lead

Semiempirical equations of state are obtained for copper, silver, gold, lead, nickel, and aluminum, which permit a study of the mechanical properties of the crystalline lattices of these metals when subjected to a complex system of stresses over the entire elastic deformation region, and lead to an evaluation of the mechanical destruction parameters of these lattices. As an example, the case of omnidirectional tension is examined.Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 1, pp. 66–70, January, 1973.     

ICP—AES法直接测定锡锭中的As,A1,Bi,Cd,Cu,Fe,Pb,Se,Sb,Zn

以电荷耦合器件为检测器的全谱直读等离子体光谱仪直接测定锡锭中Ａｓ、Ａ１、Ｂｉ、Ｃｄ、Ｃｕ、Ｆｅｄ、Ｐｂ、Ｓｅ、Ｓｂ、Ｚｎ十种杂质元素的含量。该方法简便、快速且具有比化学法更低的检出限,加标回收试验结果不明,回收率为９２％－１０５％,ＲＳＤ均小于１．５％。     

Surface energies of the solid solutions between Ti, V, Cr, Zr, Nb, Mo, Hf, Ta, and W

The surface energy for different surface orientations of the solid solutions as a function of concentration formed by Ti, V, Cr, Zr, Nb, Mo, Hf, Ta, and W is computed and analyzed using the BFS method for alloys. Similarities and differences among the different binary alloys are examined in terms of strain and chemical effects.     

Density-functional calculations of alpha, beta, gamma, delta, delta', and epsilon plutonium

Total energies for the six known polymorphs of plutonium metal have been calculated within spin and orbital polarized density-functional theory as a function of lattice constant. Theoretical equilibrium volumes and bulk moduli correspond well with experimental data and the calculated total energies are consistent with the known phase diagram of Pu. It is shown that a preference for the formation of magnetic moments, increasing through the alpha-->beta-->gamma phases, explains their position in the ambient pressure phase diagram and their anomalous variation of atomic density. A simple model is presented that establishes a relationship between atomic density, crystal symmetry, and magnetic moments which is universally valid for all Pu phases.