Investigation of the Stability of Bi-Anode Electrochemical Hydride Generator

The stability of the self-made bi-anode electrochemical hydride generator (BAECHG) with lead and titanium wires as cathode and anode, respectively, was improved by attaching two pieces of porous epoxy resin sheets to both sides of the anode. This improved BAECHG has good generation efficiency and stability and can run continuously for several months. Additionally, it also has the advantages of lower cost and less consumption of chemicals as compared to the chemical hydride generator. Finally, this BAECHG in combination of atomic fluorescence spectrometry (AFS) was applied to the determination of arsenic (As) and antimony (Sb) in certified soil samples. It was found that the results were close to the certified values and the recoveries of As and Sb were in the range of 96.3–107.0% and 96.0–103.0%, respectively.     

原子荧光光谱法测定水和废水中砷和硒的不确定度评定

全面分析原子荧光光谱法测定水和废水中砷和硒的影响因素,评估了各因素的不确定度以及原子荧光法测定水和废水中砷和硒的测量结果不确定度.     

Charge-discharge characteristics of nanocrystalline Co3O4 powders via aerosol flame synthesis

Nanocrystalline Co₃O₄ powders were synthesized by aerosol flame synthesis (AFS) method for the anode of lithium ion batteries and the basic electrochemical properties were investigated. The effects of synthesis conditions and heat-treatment temperature on the morphology, crystallite size and electrochemical properties were investigated. As-prepared soot contained Co₃O₄, CoO and Co(OH)₂, which were eventually converted into cubic spinel Co₃O₄ by post heat treatment. The as-prepared particle size was in the range of 10-30 nm and grew to 50-85 nm by the heat treatment. With growing particle size and improved crystallinity, charge-discharge capacity and cycle performance were improved and the discharge capacity of the powder heat-treated at 700 °C was 571 mAh/g after 30 cycles, which was better than Co₃O₄ powder reported in the previous literature.     

原子荧光光谱测定化妆品中痕量铅

介绍氢化物发生－原子荧光光谱法对化妆品中铅含量的定量分析方法，并研究原子荧光光谱测定铅的分析条件。方法检出限低，精密度高，准确性好，可用于测定化妆品中的痕量铅。     

水相乙基化GC-AFS测定环境及生物样品中甲基汞

介绍基于水相乙基化和气相色谱（ＧＣ）－原子荧光（ＡＦＳ）的甲基汞分析法。水溶液中甲基汞与四乙基硼化钠反应生成甲乙基汞，由氮气吹扫捕集于Ｔｅｎａｘ管，然后由ＧＣ＿ＡＦＳ测定。应用于环境及生物样品，检测限为０５ｐｇＨｇ。     

氢化物原子荧光光谱法测定食品中铅

研究了500 ℃干灰化法氢化物原子荧光光谱法测定食品中微量铅,在 15 g·L-1硼氢化钾还原剂介质和5 g·L-1氢氧化钾溶液中,样品溶液酸度以 0.24 mol·L-1盐酸为最佳。铅浓度在5~30μg·L-1范围内呈线性,相关系数为0.993 7。RSD小于10%,回收率为91%~104%。     

同一产地黑木耳、白木耳元素组成的比较

收集了同一产地(贵州省贵阳市)的黑木耳、白木耳样品,采用X射线能谱仪(EDS)研究了样品的主要元素组成,采用红外光谱仪(IRS)分析了样品中存在的功能基团.经过微波消解或干灰化法处理后,采用电感耦合等离子体-发射光谱法(ICP-OES)、原子吸收光谱法(AAS)和原子荧光光谱法(AFS)测定样品中Al、As、B、Ba、...     

水质砷自动分析仪比对实验方法的探讨

探讨了砷自动分析仪与原子荧光法测定的实验方法,用水样相对误差绝对值的平均值（A值）和t检验两种方法对比对结果进行了判断。找出了9项环境保护行业标准之外的自动分析仪,在实际工作中比较切实可行的比对实验的方法。     

Atomic fluorescence spectrometry: A review of advances in instrumentation and novel applications

Atomic fluorescence spectrometry (AFS) is a commonly employed method for elemental analysis employed with chemical vapor generation procedures due to its low cost and high sensitivity. Advances in AFS are reviewed for 2014 and 2015 involving instrumentation and novel applications. Major advances include novel applications of diffusive gradients in thin films, photochemical vaporization, and novel atom cells. Significant applications were reported in the fields of food, bioanalytical, materials, and environmental analysis. Atomic fluorescence was employed for elemental speciation, with emphasis on the determination of mercury and arsenic.     

液液萃取-原子荧光光谱法测定地表水中的甲基汞

介绍了一种将液液萃取分离富集方法与原子荧光光谱法联用直接测定环境水样中甲基汞的新方法。采用液液萃取法将甲基汞从样品基体中分离出来,发现了适合直接测定甲基汞的原子荧光光谱法分析条件,步骤简单,尽量避免了样品前处理和分析过程中的形态转化与干扰等问题。在最优化的实验条件下,方法检出限为5.0ng·L^-1,精密度（用RSD表示）为8.6%(甲基汞含量0.1μg·L^-1,n=7),对池塘水和河水进行加标回收实验,平均回收率在82.0%—109.0%之间。