空气－乙炔火焰原子吸收测定铬时某些化学干扰的计算消除方法

本文研究了空气－乙炔火焰原子吸收法测定铬时某些化学干扰的计算消除方法，用多项式作为表达铬和干扰元素间相互关系的函数式。经测定钴－钛，铬－铁和铬－钒干扰对混合液中铬的含量，表明计算法能较好地消除铁、钴、钒对测铬的干扰效应。     

原子吸收法测定原镁石中痕量镉的研究

本文采用钴和样品自身消化反应产物硝酸镁作为混合基体改进剂,塞曼石墨炉原子吸收法测定原镁石中痕量镉,确定了仪器工作参数和测定条件,测定的相对标准偏差小于１０％,用标准加入法测定镉的回为８８－１０４％。     

火焰原子吸收法测定矿石中的低含量钼

本文介绍了用火焰原子吸收法测定矿石中低含量钼的方法，确定了最佳仪器条件。对共有元素及掩蔽方法都做了研究，取得满意结果。     

火焰原子吸收法测定不锈钢中铜

本文介绍了火焰原子吸收法测定不锈钢中的铜,利用加入一定量的乙醇及采用低流量火焰,可以消除大含量基体元素(如铁等)的干扰。铜在0～5μg/ml范围内得到良好的线性关系,相对标准偏差为2.3%(n=9)。     

石墨炉原子吸收法测定地表水中钡

在测定样品中加入适当的基体改进剂并控制工作条件及升温程序，可以快速、方便、准确地用石墨炉原子吸收法测定地表水中钡含量。     

石墨炉原子吸收法测定掺质钆镓石榴石中钴、铬、镍

用石墨炉原子吸收法测定掺质钆镓石榴石单晶中钴、铬、镍的含量,晶体中的钆不影响测定,但镓呈现背景干扰,文中对此进行了讨论。用氘灯扣除背景。钴、铬、镍含量为0.015%、0.037%、0.0057%时,变动系数分别为1.4%、1.9%、2.7%,检出限分别为2.5μg/g、0.87μg/g、2.0μg/g。     

原子吸收法测定牛黄降压丸中11种金属元素的含量

本文提出一种悬浮液进样－火焰原子吸收光谱法测定玉米面中锌、铁的新方法。将玉米面悬浮于琼脂胶体中,直接喷入空气－乙炔火焰中,用标准加入法测定,测定结果与灰化法一致。方法简便、快速。     

计算原子吸收法间接测定钒

本文研究了用空气－乙炔火焰原子吸收法间接测定钒一种计算分析方法，利用钒对原子吸收法测定铬时的干扰效应，以多项式作为表面其干扰效应的数学模型，在已知铬含量的铬钒混合液中测定铬的吸光度，并从数学模型中解出钒的浓度，从而间接测定了钒。     

固体直接进样石墨炉原子吸收法测定头发中的铜和铁

固体直接进样石墨炉原子吸收法测定人发中的痕量元素及其在人发中的纵向分布是一种有吸引力的分析方法。本文研究了测定人发中铜和铁的固体直接进样石墨炉原子吸收法,并用该法分析了日本标准人发样品中的铜和铁,所获结果与推荐值相一致。     

火焰原子吸收法测定钯／炭催化剂中金属钯的含量

本文提出了用火焰原子吸收法测定钯／炭催化剂中的钯含量，方法是将样品灰化后用甲酸还原，用逆王水溶解，经过滤后进行火焰原子吸收测定。选定最佳测定波长为247.6纳米，测定范围0.1-3%，回收率93－101％，相对标准偏差小于5％。存在于载体活性炭中的钙、镁、铁、铝和硅均不干扰测定。     

Determination of Bromine by Aluminium Monobromide Molecular Absorption Spectrometry Using Arsenic Atomic Lines

The present study was conducted to investigate the molecular absorption by AlBr in a carbon rod furnace for determination of bromine, by using the arsenic atomic line at 279.028 nm emitted from an As- hollow cathode lamp. A deuterium lamp was used for the simultaneous background correction. The interference caused by the other halogenides and some cations was also examined. The method was applied to determine bromine in organic matrice.     

偏最小二乘法在原子吸收光谱分析中的应用——钴和铟的同时测定

本文用偏最小二乘法（ＰＬＳ）校正了火焰原子吸收分析Ｉｎ２５２．１３７ｎｍ对Ｃｏ２５２．１３６ｎｍ的吸收线重叠干扰,对混合样中Ｃｏ和Ｉｎ的含量进行了测定,结果令人满意。     

塞曼校正原子吸收法测定钢铁中锌的背景过度补偿的研究

本文实验研究了在磁场置于石墨炉原子化器的塞曼背景校正原子吸收分光光度计上的铁基体对分析锌元素的影响。铁２１３．８５９ｎｍ线与锌２１３．８５６ｎｍ分析线相差０．００３ｍｍ，在分析过程中铁对锌产生严重的光谱重叠干扰和塞曼背景校正过度补偿。经实验确定了两个原子化阶段，第一个原子化阶段锌完全原子化，铁原子化；第二个原子化阶段铁完全原子化，从而实现分步测定锌和铁两种元素，完全消除了铁基体对锌的光谱干扰。     

Determination of Organic Chlorine by Aluminium Monochloride Molecular Absorption Spectrometry Using Lead Atomic Line

The present study was conducted to investigate the molecular absorption by AlCl in a carbon rod furnace for determination of chlorine in organic compounds, by using the lead atomic line at 261.418 nm emitted from a Pb-hollow cathode lamp. A deuterium lamp was used for the simultaneous background correction. The method enables rapid and accurate determination of trace chlorine in varying organic samples with good precision. The method was tested on different organic chloro-coumpounds and α-pinene products.     

High-Resolution Continuum Source Atomic and Molecular Absorption Spectrometry—A Review

Abstract

The present article gives an overview over the historic development, the instrumentation, the special features, and the applications of high-resolution continuum source atomic and molecular absorption spectrometry. The most obvious advantage is the need for only one single lamp for all elements and wavelengths, compared to one lamp for each analyte, as is necessary in line source atomic absorption spectrometry. The visibility of the spectral environment of the analytical line at high resolution greatly helps in method development and to avoid spectral interferences. The advanced simultaneous background correction automatically eliminates lamp flicker noise and continuous background absorption. Fine-structured background absorption may be removed using a reference spectrum and a least-squares algorithm. Because any wavelength between 190 nm and 900 nm can be accessed, the same equipment can be used for molecular absorption spectrometry, making possible the determination of non-metals, such as phosphorus, sulfur, and the halogens. Although commercial equipment for this technique has only been available for a few years, the technique has been accepted extremely well, and the number of applications that have been published using this technique has already reached an impressive number.     

Radiation trapping in atomic absorption spectroscopy at lead determination in different matricies

The determination of lead by flame atomic absorption analysis in the presence of Sn and Fe atoms and different matrices such as OH and SO₃ was investigated with the objective of understanding the spectral interference processes at the analytical lines 283.31 nm for a wide range of concentration.The radiation trapping factor was interpreted and evaluated assuming Voigt distribution of the atomic and rotational lines in the flame. The radiation trapping factor was increased by increasing the number density (plasma of the absorbing medium is optically thick). In plasma, there is a certain point of equilibrium between the trapping and the escaping of radiation, which is relevant to 50% of absorption.The spectral background interference can cause a variation of the number density at equilibrium point as a result of the degree of overlap with the analytical line.The spectral background interference can be easily avoided by using another resonance absorption line for the analysis. The chemical modification of the matrix is applied to minimize the interference effect. Nitric acid, ammonium nitrate and magnesium nitrate are most commonly recommended as matrix modifiers.     

邻近非共振线校正背景-火焰原子吸收光谱法测定高盐食品中的铅

介绍了高盐食品中铅的火焰原子吸收光谱测定方法;用铅283.3nm共振线测定样品溶液中铅的原子吸收信号与背景吸收信号之和,另选一条铅280nm非共振线测定样品溶液的背景吸收信号,然后减掉背景吸收信号.方法相对标准偏差为0.8％-4.1％,回收率为91％-102.5.％.该方法简便、快速、准确,用于高盐食品中铅的测定,结果令人满意.     

蒸馏-高分辨连续光源原子吸收光谱法测定果脯中二氧化硫

硫在富燃空气-乙炔火焰中可以形成CS双原子分子。CS双原子分子的吸收轮廓与原子光谱吸收类似,因此可以利用原子吸收光谱方法进行定量分析。建立了高分辨连续光源原子吸收光谱法分析果脯中二氧化硫含量的方法。果脯中的二氧化硫经酸化、蒸馏、过氧化氢氧化等过程转变为硫酸根,通过连续光源原子吸收光谱法检测。对影响二氧化硫检测灵敏度的乙炔流量、火焰高度等仪器参数进行了优化,并考察了样品中硫酸根、硫代硫酸根等不同形态硫对二氧化硫分析的干扰。优化条件下,在257.961nm波长的检出限为52.4mg·kg~(-1);相对标准偏差小于10%。应用于北京市售果脯样品二氧化硫含量测定,平均回收率在85.7%~115.7%之间。该方法具有准确快速、干扰少等优点,拓宽了原子吸收光谱法的应用范围。     

石墨炉原子吸收法测定植株镉消除背景值的改进方法

利用传统高温干法灰化植株样品和石墨炉测定镉,存在峰高计算法背景值高、测定结果偏低的问题,这对评估那些镉含量处于临界值附近的样品,带来很大困难。为了解决这一问题,文章针对石墨炉测定镉的背景值,对传统方法的前处理实验过程进行了部分改进,并对基体改进剂的适宜浓度进行了比较筛选。结果表明, 在样品灰化前加入基体改进剂硝酸镁,不仅不会使灰化液产生沉淀,而且可使背景吸光值降低一个数量级,可大大减少干扰。另外,用浓度为3%的稀硝酸代替1 mol·L-1HCl作灰化液基体可以基本消除背景值。改进方法的空白值接近0浓度,从而使测定值重新得到校正,结果更加准确。