增感效应导数火焰原子吸收光谱测定金属铜中微量铅

本文提出了增感效应导数火焰原子吸收光谱测定金属洞中微量铅的新方法，研究了基体铜对铜的增感效果，导数技术与增感效应相结合可使火焰原子吸收光谱的灵敏度提高１７倍，用本法测定金属铜中的微量铅取得了满意效果     

微乳液进样火焰原子吸收光度法测定食品中的微量锰

研究了多种表面活性剂及微乳液对火焰原子吸收光谱法测定锰的增敏作用，并选择增敏作用最强的微乳液作为锰测定的增敏试剂，拟定了测定锰的新方法。     

罗丹明B同步荧光猝灭法测微量磷的条件研究

本文研究了罗庆明Ｂ－磷钼杂多酸离子缔合物体系的荧光特性及测定方法，对实验条件进行了优化选择，并引入非离子表面活性剂ＯＰ对体系增敏，增稳。本法用于黑色食品中磷的测定，结果满意。     

胶束增敏荧光光度法测定螺内酯的研究①

本文用荧光光度法对硫酸介质中螺内酯和十二烷基硫酸钠(SDS)形成的胶束配合物的性能进行了系统研究。利用胶束的增敏增稳作用，提出了测定螺内酯的荧光光度新方法，方法线性范围宽，为1.4×10     

儿童膨化食品中痕量铝的胶束增敏荧光光度法测定

本文采用了铝－8－羟基喹啉－5－磺酸（H2QS）－十六烷基三甲基溴化铵（CTMAB）胶束增敏体系，用荧光光度法对7种儿童膨化食品中痕量铝进行了测定，同时对样品的测定条件和消化处理进行了较详细的研究。方法简单、快速、灵敏度高，测定结果令人满意。     

非离子型O／W微乳液导数分光光度法测定铝的增敏作用

本文研究了Ｔｒｉｔｏｎ－Ｘ－１００正戊醇／正壬烷／水组成的非离子型Ｏ／Ｗ微乳液对铬天菁Ｓ为显色剂，二阶导数分光光度法测定铝的增敏作用。结果表明，此法简便，快速，与相应的胶束体系比较，测定灵敏度有所提高，某些试验条件更为宽容，可不经分离直接测试试样中的微量铝。通过测定显色剂ＣＡＳ在胶束，微乳液中的分配系数和平均有效介电常数，探讨了微乳液增敏作用的机理。     

痕量钴,镍和镉的流动流射线共沉淀预浓集的研究及其FAAS测定

本文应用流动注射分析技术为痕量钴，镍和镉的火焰原子吸收光谱测定建立了一个有效的在线共沉淀预浓集系统，钴，镍和镉离子在弱酸性介质中与ＡＰＤＣ－Ｆｅ＾２＋产生共沉淀，共淀反应和沉淀收集在编结反应器中同时进行，用甲基异丁基甲酮溶洗沉淀在线引入火焰原子化器中进行测定，分析速度为７２样／ｍｉｎ，样品消耗量为１．１ｍｌ以及装样时间３０ｓ时，测定钴，镍和镉获得的增感系数分别为４２，３０，３３。测定含量水平分别为     

环丙沙星在胶束体系中的荧光特性研究及应用

研究了环丙沙星在胶束体系中的荧光性质，发现十二烷基硫基酸对环丙沙星有较强的增敏作用。据此建立了胶束增敏荧光光谱法测定痕量环丙沙星的新方法，经样品测定，其线性范围为0．033－0．60μg.mL^-1，检出限为0．033μg.mL^-1，回收率为94．0％－98．1％相对标准偏差为1．5％－2．8％。     

原子吸收分析的增感剂 Ⅰ.乳化剂OP对钼(Ⅵ)的增感作用及应用

本文研究了非离子型表面活性剂对钼(VI)的增感作用,在8％乳化剂OP存在下可使钼的吸光度增感33％。对增感机理也作了初步探讨。并利用乳化剂OP的增感作用,拟定了测定金属铬中钼的分析方法。     

曙红敏化重铬酸盐明胶光声光谱的研究

用曙红敏化重铬酸盐明胶全息记录材料，用光声光谱技术测定了这种材料的光能吸收光谱，实验的结果表明，曙红是一种新的有价值的重铬酸盐明胶光谱增感染料，可以在５１４．５ｎｍ处形成强吸收峰，这对于记录彩色全息图和制作全息光学元件是有利的，光声光谱技术在全息记录材料的光谱增感与光化学过程的测量中，是一种极其灵敏又十分有效的方法。     

基于相位复原技术测试高数值孔径光学成像系统

干涉测量的方法已被广泛应用于光学系统的波前测试中。但是由于高数值孔径的标准具加工成本高、风险大,使用干涉测量的方法对高数值孔径光学系统进行测试存在困难。运用相位复原技术对高数值以小孔衍射光束作为高精度测试基准波前进行孔径光学系统波前测试,可以解决上述问题。对不同频率波前形成的点扩散函数模拟,分析了实际测试所需的实验条件。由于缺乏高精度的对比实验条件,引入一种新的误差分析方法,搭建检测平台完成对显微镜光学系统的波前测试。通过验证实验,证明了该测试方法的可靠性。     

Investigation of vertical migration of alpha-emitting nuclides in soils for southern regions of the republic of Belarus

An investigation of vertical distribution of alpha-emitting nuclides for various types of soils using solid state nuclear track detectors (SSNTD) has been carried out. As SSNTD the DNC-film was used. Experimental system for measurement of total alpha activity in the samples of soils, including devices and equipment for selection of probes, exposition, chemical etching of detectors, automated accounting of tracks has been developed. The method of determination of specific activity of alpha emitting nuclides has been created. A comparison results of measurements with the method pointed out and radiochemical method as well as x-y-spectrometry method has been carried out.     

Stripping voltammetry of Pb and Cu using a microcantilever electrode

Microfabricated silicon microcantilevers coated with gold on one side have been used as working electrode in a three-electrode electrochemical arrangement. In addition to electrochemical current, cantilever bending has been used as a signal for monitoring electrode reactions on the cantilever surface. The microcantilever bending was measured by an optical beam deflection method as the surface potential was scanned and electrochemical reactions occurred on the surface. The microcantilever bending due to differential surface stress was used to sense Pb and Cu using cyclic voltammetry (CV) and linear sweep stripping voltammetry (LSSV).     

Preliminary characterization of semiconductor detectors in the soft X-ray range using synchrotron radiation from the VEPP-4 storage ring

A photodiode developed at the Ioffe Physico-Tech nical Institute (St. Petersburg) and referred to in the literature as the SPD has been preliminarily calibrated by the primary-detector-based method. The possibility of application of SPD photodiodes as radiometric detectors has been investigated. The AXUV-100 photodiode (IRD Inc., United States) was used as a primary detector. The radiation strength of both detectors has been tested. It was revealed that, being more radiation-resistant, the SPD had radiometry characteristics that were not worse than those of the AXUIV-100.     

X射线荧光光谱法测定混合稀土氧化物中稀土分量

建立了X射线荧光光谱法测试稀土氧化物中稀土分量的方法,讨论了样品制作方法,提出用聚四氟乙烯制作样品底座,分析试液1 mL滴入样品底座的吸附滤纸上,烘箱或红外灯下烘干,6 μm聚脂薄膜扣住测量,样品底座不吸附试样,吸附滤纸的位置及平整性由于内标的补偿不影响分析结果的准确性,初步探讨了薄试样的基体效应,测试的稀土含量范围为:La2O3 0.01%～50%,CeO2 0.01%～15%,Pr6O11 0.01%～12.5%,Nd2O3 0.01%～40%,Sm2O3 0.01%～40%,Eu2O3 0.01%～10%,Gd2O3 0.03%～40%,Tb4O70.01%～5%,Dy2O3 0.05%～10%,Ho2O3 0.01%～4.5%,Er2O3 0.01%～8%,Tm2O3 0.01%～2%,Yb2O3 0.01%～8%,Lu2O3 0.01%～1.5%,Y2O3 0.5%～80%,测试结果与外检吻合.方法易于操作,重现性好,适应范围广,测试了大量其他物料成分,可满足定量分析要求,已作为常规分析手段.     

Application of CsI(T1) Scintillator With Photodiode Readout Detector in Heavy Ion Reaction Experiments

The applications of CsI(T1) scintillator with photodiode read out in heavy ion-induced reaction experiment are reported.This kind of detector has been used as E detector in a ΔE-E telescope with silicon as ΔE detector,and has been used to measure the light charged particles.Time of crossing zero point method has been employed in the experiment with a new kind of electronics,and has been used to indentify the light charged particles.     

LDS751染料分子的时间分辨荧光谱

本文介绍用飞秒时间分辨荧光凹陷探测技术,获得激发态分子时间分辨荧光光谱的方法。文中描述了实验方法及其特点,给出了ＬＤＳ７５１染料分子的飞秒时间分辨荧光光谱。     

红外图像的各向异性分段高斯滤波

提出了一种各向异性分段高斯滤波,这种方法除了考虑图像的尺度和方向特性外,还根据边缘区域可分特性,使用了分段滤波的方法来进一步解决边缘保持的问题.该方法通过本文所提出的一种图像噪音方差估计模型来确定图像的基准尺度,并由Hermite变换得到其方向角,然后再通过确定高斯模型的轴向比和自适应尺度,使对选择区域的滤波转变为对分段高斯模型的滤波,从而使计算的可靠性得到增强.从仿真结果可以看出,各向异性分段高斯滤波器在噪音去除和边缘保持的综合性能上要优于其他常用的滤波算法.     

A new nondestructive technique for measuring pressure in vessels by surface waves

Thin-walled pressure vessels are widely used in modern industry. It is important to measure pressure of the vessels. It has been proved that the velocity of ultrasonic propagation in the material could be affected by the stresses applied to it. The pressure measurement should consider the effect of temperature as the velocity of ultrasonic is affected by the temperature and thermo-stress is produced in the vessels wall. Furthermore, the propagation distance of ultrasonic is influenced by thermal deformation due to temperature changes. In consideration of these influencing factors, a modified model of pressure measurement has been developed, and according to this model, a reference method for the temperature compensation is presented. The relationship between the time delay and pressure was established through this method. The correlative time estimation method based on Hilbert-Huang Transform is presented to estimate the time delay. Therefore, a new method for measuring the pressure of thin-walled vessels nondestructively is presented. Two vessels made of different kinds of materials were used as specimens in our experiments. The results obtain from the tests are used to validate the modified model and demonstrate that the reference method is effective.     

In vivo B/A determination in a mammalian organ

Investigations of the ultrasonic nonlinearity parameter B/A have been restricted previously to in vitro preparations. The parameter B/A has now been determined in vivo in cat liver and found to have the same value as in vitro determinations. The finite amplitude method was used, with a substitutional procedure to improve accuracy.