枸橼酸铋制剂中铋元素的溶出量分析

微波消解溶样，ICP—AES法测定了枸橼酸铋制剂中铋元素的含量及其在人工胃液和人工肠液中的溶出量。结果表明，枸橼酸铋制剂中的铋元素在人工肠液中的溶出量明显高于人工胃液。方法的检出限为12ng／mL，相对标准偏差(n=7)为3．84％。     

抑制高碘酸钾氧化结晶紫分光光度法测定痕量铋(Ⅲ)

研究发现.在体系自身酸度条件下(pH=6.5),0.05mol/L高碘酸钾能氧化结晶紫褪色,而痕量铋又能灵敏地抑制该反应.据此建立了抑制高碘酸钾氧化结晶紫分光光度法测定痕量铋(Ⅱ)的新方法,该方法的线性范围为0.002-o.05ng/mL,检出限为0.5pg/mL.本方法具有高灵敏度、选择性好、操作简便、反应快速等特点,并且用于人发和茶叶中痕量铋的测定,获得满意的结果.     

ICP—AES法直接测定铋矿石中铋

本文研究了用ＩＣＰ－ＡＥＳ法直接测定铋矿石中铋含量的方法，优化了仪器的测试条件，并对共存元素的干扰情况进行了研究，该方法简便，快速，可直接用于铋矿石中铋的准确测定，结果满意。     

活性艳蓝铋染料的合成及其光谱研究

本文以活性艳蓝和硝酸铋为原料，合成了活性艳蓝铋染料。对产物进行了铋含量的测定，测定了产物的可见光吸收光谱、红外光谱。     

阳离子金黄铋染料的合成及其光谱研究

本文以阳离子金黄和硝酸铋为原料合成了阳离子金黄铋染料,并对产物进行了铋含量的测定,测定了产物的可见光吸收光谱,红外光谱。     

ICP-OES测定一清胶囊中成药及胶囊中的微量元素

建立了微波消解ICP-OES测定一清胶囊的中成药及胶囊的Fe、Ti、P、Al、Sr、Cu、Cr、Zn、Mn、V、Cd、As等微量元素分析方法.通过分别使用HNO3、HF、H2O2和HNO3、HCl、HF、H2O2混合酸,微波消解一清胶囊的中成药及胶囊样品,比较最优化条件下的ICP-OES与原子吸收光谱法的测定结果,发现两种分析方法的测量结果之间具有较好一致性.测定的加标回收率在82.0％-102.0％之间,RSD在0.689％-3.17％之间,检出限为0.101-29.0μg· L-1.此法适用于胶囊类中成药及其胶襄的微量元素分析.     

阻抑过氧化氢氧化橙黄G褪色分光光度法测定人发中的微量铋

基于在pH=11.00的NH3-NH4Cl缓冲溶液中,铋(Ⅲ)对H2O2氧化橙黄G的褪色反应具有阻抑作用,据此建立了阻抑动力学分光光度法测定微量铋(Ⅲ)的新方法.方法的线性范围为0.008-0.32μg/mL,检出限为1.15×10-3μg/mL,对4.00μg/25mL铋(Ⅲ)进行11次平行测定A阻值的相对标准偏差为2.2％.本方法用于人发中微量铋的测定,回收率为99.3％-102.7％.     

铋中微量锂的火焰光度测定

本文报告了用火焰分光光度法测定铋中微量锂的高灵敏度方法。基体铋用碱式硝酸铋形式水解分离。测定下限为0.1微克/克。     

催化过硫酸钾氧化银-邻二氮菲-荧光黄离子缔合物褪色光度法测定痕量铋(Ⅲ)

基于 p H=5.50弱酸性介质中 ,铋 ( )催化 K2 S2 O8氧化 [Ag(phen) 2 ]+ · [FIn]-离子缔合物的褪色反应 ,建立了一种催化褪色光度法测定痕量铋 ( )的新方法。该方法线性范围为 0 .0 4— 0 .4 mg/ L,检出限为 6 .0× 10 -11g/ m L。用于发样及水样中 Bi( )的测定 ,获得了令人满意的结果 ,并对反应的机理进行了探讨。     

N-烯丙基-N''''-(氨基对苯磺酸钠)硫脲光度法测定微量铋(Ⅲ)

新显色剂N-烯丙基-N'-(氨基对苯磺酸钠)硫脲(ASATu)与铋(Ⅲ)在酸性介质中能形成稳定的1:3黄色水溶性络合物,最大吸收波长在350nm,摩尔吸光系数为6.3×104L·mol-1·cm-1;铋量在0-4.2mg/L范围内服从比耳定律,相关系数为0.9994.此法显色稳定,选择性好,操作简单.用于合金样品及合成工业废水中铋的测定,均获得满意结果.     

Pharmaceutical polymorphs quantified with transmission Raman spectroscopy

The quantification of polymorphs in dosage forms is important in the pharmaceutical industry. Conventional Raman spectroscopy of solid‐state pharmaceuticals may be used for this, but it has some limitations such as sub‐sampling and fluorescence. These problems can be mitigated through the use of transmission Raman spectroscopy (TRS). The efficacy of TRS measurements for the prediction of polymorph content was evaluated using a ranitidine hydrochloride test system. Four groups of ranitidine hydrochloride‐based samples were prepared: three containing form I and II ranitidine hydrochloride and microcrystalline cellulose (spanning the ranges 0–10%, 90–100% and 0–100% form I fraction of total ranitidine hydrochloride), and a fourth group comprising form I ranitidine hydrochloride (0–10%) spiked commercial formulation. Transmission and conventional Raman spectroscopic measurements were recorded from both capsules and tablets of the four sample groups. Prediction models for polymorph and total ranitidine hydrochloride content were more accurate for the tablet than for the capsule systems. TRS was found to be superior to conventional backscattering Raman spectroscopy in the prediction of polymorph and total ranitidine hydrochloride content. The prediction model calculated for form I content across the 0–100% range was appropriate for process control [ratio of prediction to deviation (RPD) equal to 14.62 and 7.42 for tablets and capsules, respectively]. The 10% range calibrations for both form I and total ranitidine hydrochloride content were sufficient for screening (RPDs greater than 2.6). TRS is an effective tool for polymorph process control within the pharmaceutical industry. Copyright © 2011 John Wiley & Sons, Ltd.     

Photoluminescence in europium ion–substituted bismuth niobate particles

In order to understand the influence of the substitution of europium ion for bismuth ion in the structural and photoluminescence properties of bismuth niobate, bismuth niobate ceramic powders, with different amount of europium ion, were prepared using sol–gel citrate route. The structural and morphological studies were made with X-ray diffraction, Raman, and scanning electron microscopy measurements. Rietveld’s analysis of X-ray diffraction proves the formation and increment of europium niobate phase in europium ion–substituted bismuth niobate samples with increase of europium ion concentration. Photoluminescence results also concur to that of X-ray diffraction and Raman with gradual swapping of europium ion emission from one phase to the other phase at higher concentration.     

IR测定复方枸橼酸阿尔维林软胶囊中的西甲硅油

建立红外光谱法测定复方枸橼酸阿尔维林软胶囊中西甲硅油的含量.选用正己烷萃取西甲硅油,根据聚二甲基硅氧烷在1260cm-1波数处Si-CH3基团的对称变形振动有特征吸收峰,使用红外光谱波数为1330-1180cm-1,分辨率:2.0cm-1,狭缝:宽,响应:快;温度:25℃;相对湿度:50％.在选定的分析条件下,系统适用性、精密度和稳定性良好;西甲硅油在1.0-24.0mg·mL-1浓度范围内呈良好线性关系(r=0.9965);加标回收率为100.79％ (RSD=1.68％,n=9); 3批样品含量测定结果分别为标示量的98.70％、97.93％、98.58％.该法简便、快速、专属性强、精密度高,适用于复方枸橼酸阿尔维林软胶囊中西甲硅油的含量测定.     

Ba-Zr codoped sodium bismuth titanate by novel alkoxyless wet chemical route: processing and electromechanical behavior

Sodium bismuth titanate (NBT) based ceramics have been shown to be a promising lead-free alternative to commercial piezoelectrics and high capacitance materials. This article reports a novel aqueous citrate gel route for the synthesis of (Na_0.5Bi_0.5)_xBa_1-xTi_yZr_1-yO₃ powders. Instead of alkoxides, usually used in citrate gel route, aqueous citrate solutions of titanium and bismuth were prepared from their respective inorganic salts. These solutions were used to prepare powder of (Na_0.5Bi_0.5)_0.88Ba_0.12Ti_0.96Zr_0.04O₃. The process produced an amorphous xerogel that was readily crystallized to a pseudocubic perovskite phase when calcined at temperatures as low as 500 °C. The decomposition and oxidation of the xerogel was studied using TG-DTA, which showed complete removal of volatile components by 580 °C. The formation of crystalline phases was studied using XRD. SEM was used to evaluate the sintering behavior of the powder. The powder exhibits significant sintering at temperatures 800–900 °C. The polarization behavior of the sintered material was similar to one prepared by conventional solid state route. A maximum polarization of ∼24 μC/cm² and peak bipolar strain ∼0.095% at 44 kV/cm was achieved in the sintered material. PACS 77.22.Ej; 77.84.Dy     

铋、氧化铋、硫化铋在硝酸-硫脲中的溶解性

研究了铋、氧化铋、硫化铋在硝酸-硫脲中的溶解性。三价铋离子与硫脲溶液可形成黄色络合物,在波长为460nm处,反应温度为25℃,反应时间为6min,硝酸浓度为1.0mol/L,硫脲浓度为0.5mol/L,振荡速率为160r/min条件下铋含量在0.059—4.57μg/mL范围内服从郎伯-比尔定律,检出限为m=0.04μg。铋矿物的溶解性顺序大小为Bi2O3>Bi>Bi₂S₃。本方法操作简便,可靠,实验结果满意,具有广泛的实用意义。     

Near Infrared Broadband Emission from Bismuth-Dysprosium Codoped Chalcohalide Glasses

We investigate the broadband infrared emission of bismuth doped and bismuth/dysprosium codoped chalcohalide glasses. It is found that the bismuth/dysprosium codoping can drastically enhance the f/uorescence as compared with either bismuth or dysprosium doped glasses. Meanwhile, the full width at half maximum of bismuth/dysprosium codoped glasses is over 170 nm, which is the largest value among all the reported rare-earth doped chalcohalide g/asses. An ideal way for energy consumption between bismuth and dysprosium ions is supposed. Such improved gain spectra of both bismuth and dysprosium ions may have potential applications in developing broadband fibre amplifiers.     

铋膜电极差分脉冲溶出伏安法测定痕量镉

研究了用铋膜电极测定痕量重金属元素镉的差分脉冲溶出伏安法,并对实验条件进行了优化。结果表明：铋膜电极可以获得和汞膜电极类似的良好溶出峰,且电极重现性好。在优化的实验条件下,镉离子的氧化峰电流与镉离子的浓度在10—440μg.L-1的范围内呈线性关系,检出限为4.66μg.L-1。铋膜电极优异的电化学性能加上低毒性,使其可以用来测定环境和工业中的镉。     

A novel fabrication method for stoichiometric strontium bismuth tantalate thin films for memory devices

A novel method of processing ferroelectric thin films to eliminate excess bismuth is reported. Rapid thermal annealing initiates the crystallization of bismuth layer- structured ferroelectric thin films. Subsequent crystallization annealing for longer periods improves the crystallinity of the thin films. During annealing bismuth is known to diffuse to the surface and into the electrode, which is deleterious to the device performance. Forming-gas annealing after the rapid thermal annealing (prior to the crystallization annealing) reduces the bismuth diffusion into the electrode significantly. The suppression of bismuth diffusion into the electrode and the elimination of excess bismuth in the films improves and stabilizes the electrical properties of the capacitors, in particular their electronic conduction.