乳酸亚铁中总铁的溶样及比色测定

本文研究在ＨＮＯ３－ＨＣｌ体系乳酸亚铁中的Ｆｅ＾２＋会被氧化成Ｆｅ＾３＋，用碘基水杨酸比色法就能准确测定总铁量，回收率在９８％－１００％，相对标准偏差为１．１４％，摩尔吸光系数为５．６×１０＾４Ｌ．ｍｏｌ＾－１．ｃｍ＾－１，含铁量在０－７００μｇ／１００ｍＬ范围内符合比耳定律。     

导数光谱法同时测定甲硝唑和维生素B6的研究

本建立了以０．１ｍｏｌ／ＬＨＣｌ为介质，采用三阶导数光谱法，同时测定甲硝唑和维生素Ｂ６的新方法，方法检测限为０．８１μｇ／ｍＬ甲硝唑和０．１６μｇ／ｍＬ维生素Ｂ６，二测定的线性范围均为１．６－２２．４μｇ／ｍＬ，直接用于复方甲硝唑片剂中甲硝唑和维生素Ｂ６的测定，两种生物的测定变异系数分别小于２．２６和２．６０％，回收率分别为９３－１０２％和９９－１０１％．     

动力学荧光法测定溴离子的研究

利用溴离子对溴酸钾氧化荧光素的催化作用，建立了动力学荧光法测定微量Ｂｒ＾－的新方法，方法的检出限为１．９４×１０＾－２μｇ／ｍＬ，线性范围为６．０～１２．０μｇ／２５ｍＬ，将方法用于溴吡斯的明药片中Ｂｒ＾－含量的测定，结果满意。     

新间接紫外光度法测定微量SO3^2—

在ｐＨ７．０混合磷酸盐介质中,ＳＯ３＾２－使Ｉ３＾－与ＣＴＭＡＢ生成离子缔合物ＣＴＭＡ＾＋,Ｉ３＾－而褪色,从而建立了测定ＳＯ３＾２－的新间接紫外光度法,测定波长为３６５ｎｍ,ＳＯ３＾２－浓度在０－２５μｇ／２５ｍＬ内服从比耳定律,表观摩耳吸光系数为ε＝６．０４×１０＾４Ｌ·ｍｏｌ＾－１·ｃｍ＾－１,可用于食品中微量ＳＯ３＾２－的测定,其结果满意。     

新显色剂8-喹啉偶氮槲皮素的合成及其与Fe(Ⅲ)显色反应的研究

本文研究了新显色试剂８－喹啉偶氮槲皮素的合成方法及其理化性质,显色性能和与Ｆｅ（Ⅲ）的显色反应条件,在ＴｗｅｅＮ－８０存在下,ＰＨ＝１０．３的ＮＨ３－ＮＨ４Ｃｌ缓冲介质中,Ｆｅ（Ⅲ）与８－ＱＡＱ的络合物在５００ｎｍ处有最大吸收,表观摩尔吸光系数为１．０６×１０＾５Ｌ·ｍｏｌ＾－１·ｃｍ＾－１,Ｆｅ（Ⅲ）含量在０－２．６μｇ／１０ｍＬ范围内符合比耳定律。在室温下,络合物至少稳定１５ｈ,络合比为１：３     

乙酰螺旋霉素的一阶导数光谱法测定

在０－２５μｇ／ｍＬ范围内，国酰螺旋素一阶导数光谱在２２０－２５０ｎｍ之间的峰谷振幅Ｄ与浓度呈现良好的线性关系，基于此建立了乙酰螺旋霉素的分析方法。该法回归方程为Ｃ＝３．０９Ｄ－０．２４７，相关系数为０．９９９６，直接用于乙酰螺旋霉素片的测定，结果令人满意。     

同步辐射EXAFS研究FeCl3溶液中Fe离子的区域结构

ＥＸＡＦＳ研究ＦｅＣｌ３溶液中Ｆｅ＾３＋的区域环境结构随溶液浓度的变化，Ｆｅ＾３＋的径向结构函数表明，随着ＦｅＣｌ３溶液的浓度降低，第一配位峰的距离逐渐缩短，当溶液浓度从３．０ｍｏｌ／Ｌ降到０．２ｍｏｌ／Ｌ时，配位距离减小到０．０１４ｎｍ，但振幅峰强度以０．８ｍｏｌ／Ｌ浓度为最小，其强度比浓的或稀的ＦｅＣｌ３溶液的低约３０％，结构参数拟合结果表明，０．２ｍｌ／Ｌ，ＦｅＣｌ３稀溶液中Ｆｅ＾３＋的近邻     

Fe（Ⅲ）—H2O2—固绿FCF—1,10—菲罗啉体系催化褪色光度法测定痕量铁

基于ＰＨ４．０的弱酸性介质 离子对过氧化氢氧化固绿ＦＣＦ褪色反应的催化作用,提出了催化褪色光度法测定痕量铁的新方法。研究了该方法的适宜反应条件,方法的检出限为９．７×１０＾－７ｇＦｅ（Ⅲ）／Ｌ,线性范围为０－１．５μｇＦｅ（Ⅲ）／２５ｍＬ方法用于水中痕量铁的测定,结果满意。     

次甲基绿—溴酸钾体系催化光度法测痕量钒（V）的研究

本文基于在抗坏血酸存在下，痕量钒（Ｖ）对溴酸钾氧化次甲基绿褪色的新指示反应，建立了一个催化动力学光度法测痕量钒（Ｖ）的新方法。线性范围为０－０．１２μｇ／２５ｍＬ和０．１２－０．２０μｇ／２５ｍＬ，方法检出限为３．４×１０＾－１０ｇ／ｍＬ。用于人发、水样中痕量钒（Ｖ）的测定，结果满意。     

罗丹明6G—Mo（V）—SCN—PVA体系荧光熄灭法测定合金钢中微量钼

在Ｈ２ＳＯ４介质中，Ｍｏ（Ｖ）与ＳＣＮ＾－生成的络离子能够熄灭罗丹明６Ｇ的荧光，加入聚乙烯醇（ＰＶＡ－１２４）后，体系的荧光熄灭程度比不加时大２３倍，Ｍｏ量在０．０７５－３．５μｇ／２５ｍＬ范围内与荧光熄灭值△Ｆ成线性关系，本法灵敏度高，选择性好，可用于合金钢中微量钼的测定。     

Infrared Quantitative Study of Acetylation of Microspheres of Polystyrene

Abstract

Fourier transform infrared spectroscopy has been used to study quantitatively the acetylation of monodisperse polystyrene microspheres with diameters ranging from 7 to 9μm. The CH₂ stretching infrared vibration mode at 2921 cm^?1 was used as the internal intensity standard. The acetylation extent could be easily measured by comparing the relative intensities of the bands of acetyl group (1678, 1415, 1359 cm^?1) or the bands due to the para-substituted benzene ring to the band at 2921 cm^?1 from the calibration curve.     

BSA-SDS-Ag聚合物纳米微粒的制备及其水凝胶性质的研究（Ⅰ）

报道了BSA－SDS－Ag聚合物纳米微粒的制备及水凝胶的性质,用X射线衍射（XRD）、透射电镜（TEM）、傅里叶变换红外（FT－IR）光谱考察了这种聚合物微粒的结构,微粒粒径32nm左右,用UV／Vis光谱及SEM考察了冰凝胶的性,表明Ag^ 离子先与BSA产生化学键合,再学原了Ag粒,进行聚合成网状结构的聚合物。     

Application of the method of X-ray fluorescence analysis for determination of the degree of chlorination of copper phthalocyanin

To whom correspondence should be addressd.     

混合物物态方程的计算

 在采用体积相加原理计算混合物物态方程的基础上,建立了一种物理模型确定混合物温度。根据混合物中各组分温度和压强平衡条件,采用压强-密度迭代方法计算给出混合物物态方程,编制了两种组分的混合物物态方程计算程序。为检验建立的温度模型的合理性及程序的有效性,分析了不同密度、温度状态的氢（H2）和钨（W）组成的混合物状态参量,计算了以下情形及其组合情形的混合物物态方程：H₂和W以不同质量比混合;质量比固定,单组分状态不同;温度区间和密度区间不同。研究表明:实际应用中在建立的混合物温度模型基础上确定的混合物物态方程是合理的。     

傅里叶望远镜外场实验性能改进和结果分析

为了实现对傅里叶望远镜成像系统更接近实际的仿真,改进了外场实验系统结构。采用反射式目标,利用准直扩束镜替代空间滤波器和准直透镜,使用大靶面电荷耦合器件作为监视器。在无大气和包含200m水平大气两种情况下,分别对2.5mm的4种不同空间频谱分布目标进行实验。实验选用9×9,17×17,33×33和65×65傅里叶分量分别进行重构。最高成像角分辨率为3.5″。结果表明含大气与无大气重构结果的Strehl比值相近,从而证明傅里叶望远镜成像系统能够克服下行链路低阶大气扰动的影响。     

Electron microscopy study of aggregation of microclusters of sulphur

A study of aggregation of sulphur particles in colloidal suspension of sulphur in water-methanol mixture using TEM and electron diffraction is reported. From the micrographs the aggregates formed have been found to be random and tenuous indicating a fractal structure. The electron diffraction patterns of the aggregates are used to study the mechanism of diffusion and reaction limited aggregation.     

Optical investigation of dynamics of phenomena of laser-based lithotripsy

Using time-resolved high-speed shadowgraphy, the dynamics of phenomena due to laser-based lithotripsy is studied. Collapsing mechanism of bubble formed therein is investigated. In order to study the mechanism, the optically implemented mathematical morphology is applied. The study of the shape of the plasma and the collapsing region of the bubble of fluid that we are studying can possibly be used for practical application for laser-based lithotripsy.     

Some peculiarities of deep PT-changes of physical properties of rocks

Abstract

Results of petrophysical PT-experiments are discussed. Used is a method of program modeling of experiments. Thermobaric dependence of elastic properties of acid, intermediate and basic rocks as well as elastic wave velocity anisotropy in amphibolites is studied. Deep PT-regimes effect on electrical resistance of dry and water-saturated rocks has been studied. PT-conditions of full loss of the remanent magnetization of volcanites have been established. A number of regional petrophysical lithosphere models has been constructed.     

分子费米共振拉曼光谱强度分析

测量了CCl₄和CS₂分子的Raman光谱。用Bertran理论和群论等相关理论对其光谱强度进行了分析,获得了发生费米共振分子的拉曼光谱强度的特殊规律： (1)发生费米共振的基频和倍频(和频)间发生能量转移,两光谱强度大小相互接近,当发生费米共振的基频和倍频(和频)间距离很小时,两发生费米共振的光谱强度相等(R=1);(2)能出现倍频光谱强度高于其基频光谱强度;(3)也会观测到费米共振光谱,而观测不到参与费米共振的和频中的基频光谱。此研究对化学、材料科学中的分子结构、材料成分等研究中的谱线认证、归属有很好的参考价值。     

Simulation of the contours of spectral lines of closed-ARC radiation

Simulated contours of self-reversed lines of Tl at 535 nm (7²S_1/2−6²P_3/2) and 378 nm (7²S_1/2-6²P_1/2) in alternating-current closed-arc radiation in mercury vapor with an addition of Tll were compared with experimental contours. It is shown that while a single self-reversed contour has many different sets of model parameters that ensure coincidence of experimental and calculated profiles, in the case of operation with a large data file of contours that correspond to different directions of observation along chords perpendicular to the discharge axis, and with different lines that have a common level, such a set of parameters becomes virtually unique. Instantaneous spatial distributions of Hg and Tl atoms in the ground state and of Tl atoms in the 6²P_3/2 state are determined and the parameters of the van der Waals broadening of the 7²S_1/2 level are found. It is shown that a considerable “red” shift of absorption contours in the outer layers of the discharge is observed. The results obtained contradict the presumed existence of local thermodynamic equilibrium in the given discharge. Reported at the Conference “Plasma Physics and Plasma Technologies,” Minsk, September 15–19, 1997 Petrozavodsk State University, 33, Lenin Ave, Petrozavodsk, 185640, Russia. Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 65, No. 5, pp. 761–768, September–October, 1998.