原子吸收光谱法测定钡铝消气剂中钡

本文研究了用原子吸收光谱测定钡铝消气剂中钡的方法，取代了以往工艺分析中一直采用的硫酸钡重量法。通过大量试验确定了适宜的测定介质和条件，使得在空气－乙炔低温火焰中实现了钡的定量。解决了钡的电离问题，提高了分析速度，也提高了分析精度。     

掺Sb和PbWO4晶体发光性能的改善

首次报道了ＰｂＷＯ４：Ｓｂ的光谱特性,包括透射谱和Ｘｅ灯光源激发的发射与激发谱,掺Ｓｂ具有增强绿光带、抑制红光带并大幅度提高光产额的效果,通过与空气退火ＰＷＯ发光的比较,对绿光带的起因、Ｓｂ掺杂的作用也进行了简要的讨论。     

掺Sb对PbWO_4晶体发光性能的改善

首次报道了ＰｂＷＯ４：Ｓｂ的光谱特性,包括透射谱和Ｘｅ灯光源激发的发射谱与激发谱．掺Ｓｂ具有增强绿光带、抑制红光带并大幅度提高光产额的效果．通过与空气退火ＰＷＯ发光的比较,对绿光带的起因、Ｓｂ掺杂的作用也进行了简要的讨论．     

富氧空气-乙炔火焰原子吸收光谱法测定矿泉水中痕量钡

本文研究了用富氧空气 乙炔火焰原子吸收光谱法测定钡 ,比较了乙炔流量、氧气流量及氧炔比的影响 ,当混合空气中含氧量为 5 2 % ,氧炔比为 0 72时对钡有较高的灵敏度。在此火焰中 ,不同浓度的各种酸及大多数金属离子对钡的测定干扰较少 ,当溶液中引入 10 0 0mg·L- 1 K时 ,具有最大的增感及消除干扰的效应。方法的检出限为 0 0 34mg·L- 1 ,灵敏度为 0 16mg·L- 1 / 1% ,相对标准偏差为 2 5 %。     

激光诱发SiH4＋CH4等离子体的发射光谱

本工作采用光学发射谱方法测量了ＴＥＡ ＣＯ２脉冲激光辐射ＳｉＨ４＋ＣＨ４系统产生的等离子体反应过程中的发射谱特性，探测到了Ｓｉ，Ｓｉ＾＋，Ｓｉ＾２＋，Ｃ，Ｃ＾＋，Ｃ＾２＋，ＣＨ，ＳｉＨ，ＳｉＨ＾＋，Ｓｉ２和Ｈ的特征辐射，研究了含Ｃ，Ｓｉ碎片粒子光谱随实验条件的变化规律，并讨论了反应条件对ＯＥＳ的影响。     

中间层Re的加入对覆膜钡钨阴极性能的改善

研究了一种新型的覆膜钡钨阴极——双层膜(Os-W/Re膜)钡钨阴极.对这种新型阴极的发射性能进行了测试，重点对其老炼前后表面薄膜的微观形貌进行了分析，表明中间层Re膜的加入使覆膜钡钨阴极的性能得到了改善.通过对Os-W双元合金膜钡钨阴极和Os-W/Re双层膜钡钨阴极发射特性的比较，发现Os-W/Re双层膜阴极的直流发射性能好于Os-W合金膜阴极.对两种阴极激活后发射表面的X射线光电子能谱分析表明，Os-W/Re双层膜阴极激活后表面形成的三元合金膜是其发射特性优于Os-W合金膜阴极的主要原因.应用扫描电子显微镜分析比较两种阴极激活老炼后的表面状态，结果表明：Os-W合金膜阴极在老炼一段时间后，其表面薄膜出现开裂，这会导致阴极发射均匀性下降；而Os-W/Re双层膜阴极在同样老炼条件下，发射表面薄膜均匀并保持完整，从而确保覆膜钡钨阴极发射均匀性和工作可靠性. 关键词： 双层膜钡钨阴极 Os-W/Re膜 Os-W膜 薄膜开裂     

氧化亚氮／乙炔火焰原子吸收与火焰原子发射光谱法测定头发样中铝

本文采用Ｎ２Ｏ／Ｃ２Ｈ２ＦＡＡＳ和ＦＡＥＳ两种方法同时测定正常人头发中的铝，并对测定条件、干扰物质的影响及测定结果进行了比较。实验表明，在酸性介质中，选择３９６．１ｎｍ发射线，不论是物质的干扰程度、还是测定的精确度、灵敏度和回收率，ＦＡＥＳ法均优于ＦＡＡＳ法。其对应的ＲＳＤ（ｎ＝９）分别为２．２和２．７％，检出限分别为０．０７和０．２５μｇ／ｍＬ。在１．０ｇ头发样品中加入２０．０μｇ铝，其回收率分     

用Monte Carlo模拟方法研究ICP－AES中的物理化学过程 Ⅱ．蒸发过程的模拟和有效质量传输速率的计算

本文讨论用ＭｏｎｔｅＣａｒｌｏ方法模拟ＩＣＰ－ＡＥＳ中蒸发过程的理论依据和基本思想，得到了与发射强度密切相关的有用质量传输速率。     

FAAS法测定对氯基乙酰苯胺中的铁

本文建立了火焰原子吸收光谱法测定对氨基乙酰苯胺中的铁的方法。样品用酸分解或灰化处理后进行酸溶。采用氧化性空气／乙炔火焰，于２４８．３ｎｍ波长进行测定，２４种金属离子不干扰铁的测定，其特征浓度为０．０７５μｇ／ｍＬ／１％吸收，ＤＬ（３Ｓ）为０．０１４μｇ／ｍＬ，ＲＳＤ（ｎ＝１１）为０．７２％，标准回收率为９８％－１０３％。本方法与ＩＣＰ－ＡＥＳ法及分光光度法测定结果一致。     

FAAS法测定对氨基乙酰苯胺中的铁

本文建立了火焰原子吸收光谱法测量对氨基乙酰苯胺中的铁的方法。样品用酸分解或灰化处理后进行酸溶。采用氧化性空气／乙炔火焰，于２４８．３ｎｍ波长进行测定，２４种金属离子不干扰铁的测定，其特征浓度为０．０７５μｇ／ｍＬ１％吸收，ＤＬ（３Ｓ）为０．０１４μｇ／ｍＬ，ＲＳＤ（ｎ＝１１）为０．７２％，标准回收率为９８％—１０３％。本方法与ＩＣＰ－ＡＥＳ法及分光光度法测量结果一致。     

原子吸收光谱法测定有机锗（Ge─132）中的锗及其杂质

火焰原子吸收法测定有机锗（Ｇｅ．１３２）①中的锗，线性浓度范围为０－１．２５ｍｇ／ｍＬ，方法精度为１．２％，相对标准偏差＜２％，平均回收率为９９．５％。杂质Ｐｂ和Ａｓ用塞曼石墨炉原子吸收测定，Ｐｂ用（ＮＨ_４）_２ＨＰＯ_４＋Ｍｇ作改进剂，Ａｓ用Ｐｄ作改进剂，特征质量分别为８．２ｐｇ和８ｐｇ，相对标准偏差分别为２．１％和２．２％，并讨论了有关机理问题。     

The Use of a Triple Pass Optical Arrangement for the Determination of Arsenic and Selenium by Atomic Absorption Spectroscopy in an Inert Gas Shielded Nitrous Oxide-Acetylene Flame

The utility of the inert gas shielded nitrous oxide-acetylene flame for the determination of arsenic and selenium by atomic absorption spectrometry has been demonstrated elsewhere¹. The low background absorbance of the fuel-rich, 50 mm path-length flame (ca 4 and 5% at the As 193.7 and Se 196.0 nm lines respectively) permits the attainment of detection limits which are equal to, or somewhat superior to, those obtainable with the air-acetylene flame. The AAS sensitivity (that concentration producing 1% absorption), however, is decreased; this is the result of the shorter path length of this flame compared to that employed for air-acetylene (100 mm) and the lower concentration of analyte produced in the larger volume of gas used to support the flame.     

原子吸收光谱法测定血浆锌铜铁钾钠钙镁

本文报道了利用空气-乙炔火焰原子吸收光谱法对血浆中锌、钢、铁、钾、钠、钙和镁七元素同时测定的方法。     

悬浮液进样-火焰原子发射光谱法测定米类粮食中的钾

将悬浮液进样技术应用于火焰原子发射光谱分析,成功地测定了大米,小米及高梁米中的钾,建立了快速测定钾的新方法。将样品磨细、制成琼脂悬浮液,为消除电离干扰,取适量悬浮液,加入ＮａＣｌ溶液,并制成试液。将试液喷入空气－乙炔火焰,用工作曲线法测定。     

Relative atomic transition probabilities for Na,Sc, Ti,Cr, Fe,Co, and Ni using flame atomic absorption spectroscopy

Relative atomic transition probabilities (A_ji), for Na, Sc, Ti, Cr, Fe, Co, and Ni, using flame atomic absorption spectroscopy have been determined. Absorption measurements in air-acetylene and nitrous oxide-acetylene flames using both line emission and continuum excitation sources were employed. A comprehensive discussion and critical evaluation of A_ji values for this work and others of comparable scope and design is included. The effect of the absorption line profile including hyperfine structure is discussed.     

Acid Interferences in Indirect Determination of Silicon bt Atomic Absorption Spectroscopy (AAS)

Although silicon may be determined directly by AAS using a nitrous oxide - acetylene flame, there have been reported procedures for its indirect determination based on interference with other elements, mostly strontium, magnesium, calcium and barium.     

悬浮液进样-火焰原子吸收光谱法测定烟草中的钙

用悬浮液进样技术-火焰原子吸收光谱法成功地测定了烟草中的钙.样品经粉碎,过筛,制成琼脂悬浮液.用适量琼脂溶液稀释后直接喷入空气-乙炔火焰,与灰化法进行了比较,两者无显著性差异.方法简便、快速、准确.     

Detection and Quantitation Of Several Atomic Species By Intra-cavity Quenching Of Laser Emission

Until recently laser research has been the province of the physicist wherein lasers have been utilized extensively as sources of coherent, highly monochromatic energy. The thrust of this research has been to employ the organic solution laser output as an analytical signal from which information about a particular system may be extracted. Preliminary investigations in this laboratory showed that a great number of variables are active in the achievement of lasing from an organic solution. More significantly, concurrent work in this laboratory produced some anomalous results which were subsequently attributed to a cavity defect. This suggested that small energy losses at discrete wavelengths within the resonant cavity of an organic solution laser could result in quenching of broad band laser emission at those specific wavelengths. These considerations led to investigations in which atoms and mlecules were purposefully introduced into the resonant cavity of an organic solution laser.¹ A search of the literature revealed that investigators at The National Bureau of Standards had previously observed this phenomenon and had reported on the intra-cavity absorption of a pulsed rhodamine 6G laser emission by sodium vapor.² In a follow-up paper Keller and co-workers demonstrated the enhancement of absorption for Eu(NO₃)₃) when placed within the cavity of a rhodamine 6G laser. Concurrently absorption was observed from Ba and Sr in an air-acetylene flame within a dye laser cavity by, Thrash et al.⁴ Hansch and co-workers⁵ duplicated the intra-cavity absorption experiment with iodine vapor and compared the sensitivity of this result with measurements obtained from conventional absorption techniques. At about the same time Latz, Wyles, and Green¹ reported data which dennnstrated that the extent of intra-cavity absorption for nitrogen dioxide was linearly related to its concentration. Investigation into the use of a laminar flow burner with an air-acetylene flame within a dye laser cavity showed part per billion (ppb) detection limits for sodium as well as the detection of barium and mercury. The completion of these intracavity absorption studies in the visible region of the spectrum yielded the results which are reported here as well as quantitative intyacavity absorption data for Eu⁺³. In an independent study Konjevic also reported detection of sodium by intra-cavity absorption from an airnatural gas flame⁶.     

悬浮液进样-火焰原子吸收光谱法直接测定高乐高中的钙和铁

将悬浮液进样技术应用于火焰原子吸收光谱法,样品不经消解直接测定了高乐高中的钙和铁含量.将高乐高悬浮于琼脂胶体中制成悬浮液,直接喷入空气-乙炔火焰,用标准加入法测定,平均加标回收率钙为96.3％,相对标准偏差(RSD)≤3.4％;铁为95.2％,RSD≤6.3％,方法简便,快速,准确.