流动注射—可见光与原子吸收联机测定血清中磷及钙

采用流动注射一次进样串联测定血清中磷，钙，即以串联的可见分光光度计与原子吸收分光光度计先后连续测定磷和钙，试验了流动注射系统的实验条件。结果磷，钙回收率分别为９９．７％，１０２．０％，变异系数各为２．７％，２．５％，即与手动法结果相同或更优。     

ICP-AES法测定水中微量磷

用ICP－AES法测定水中磷，并确定了最佳测定条件，检出限为0．02μg.mL^-1，回收率为96．5％－102．1％，RSD为1．65％－2．83％。该法准确、快速、简便，应用于水中磷的测定，结果令人满意。     

流动注射－可见光与原子吸收联机测定血清中磷及钙

采用流动注射一次进样串联测定血清中磷、钙，即以串联的可见分光光度计与原子吸收分光光度计先后连续测定磷和钙。试验了流动注射系统的实验条件。结果磷、钙回收率分别为９９．７％、１０２．０％，变异系数各为２．７％、２．５％，即与手动法结果相同或更优     

萃取-磷钼蓝比色法测定镍铬丝中磷

在0．7—1．0mol/L的硝酸介质中^[3]，采用萃取-磷钼蓝比色法测定镍铬丝中的磷，络合物的最大吸收峰位于680nm，测定范围为0．001％-0．05％，相对标准偏差为＜3．8％。     

火焰原子吸收光谱法测定固体废弃物磷石膏中微量铜和铅

利用浓硝酸和浓盐酸消解磷石膏固体样品，选择了这两种酸的最佳用最，建立一种磷石膏样品处理方法。研究了应用火焰原子吸收光谱法直接吸取含盐量高的样品溶液，测定其中CU和pb的可行性。一份样品进行7次测定，结果表明，CU和Pb的RSD分别为2．6％和2．0％，加标回收率分别为92.88％一105．04％和91．20％－103．60％。     

铋磷钼蓝分光光度法测定金属硅中磷

本文建立了测定金属硅中磷的方法，检出限为0．0020％，回收率为92％－104％。     

ICP-AES测定电镀高纯铜中微量磷

用浓HNO3溶解高纯铜试样，电感耦合等离子体发射光谱(ICP-AES)测定其中微量磷，并对试样处理、测试方法、提高灵敏度等条件进行了优化实验。结果表明，方法回收率为99．07％-102．0％，RSD(n＝6)为0．22％-0．25％。     

ICP—AES法测定复合肥中磷,钾,锌,锰和硼

用ＩＣＰ－ＡＥＳ法同时测定了复合肥中磷，钾锌锰和硼，确定了仪器的工作参数，对分析线的选择，背景扣除。酸度影响和共存元素间的干扰等进行了研究。方法的回收率为９５％－１０４％，相对标准偏差为２．６６％－５．５４％。     

分光光度法测定纯稀土金属中微量硅

本文研究了纯稀土金属中微量硅的钼蓝测定方法,在ｐＨ＝１．２时,加入酒石酸破坏磷钼酸以消除磷的干扰,以抗坏血酸为还原剂,在λ＝８１０ｎｍ处,测定吸光度,测定浓度范围为０．０００５％￣０．０１５％。     

ICP-AES法测定耐磨合金钢中Ni、Cr、Mo、V和W等十二种元素

本文采用王水、硫磷混酸溶解试样，研究了应用ＩＣＰ－ＡＥＳ技术测定耐磨合金钢中Ｎｉ、Ｃｒ、Ｍｏ、Ｖ、Ｗ、Ｚｎ、Ｃｏ、Ｌａ、Ｃｅ、Ｔｉ、Ｍｎ、Ｃｕ１２种元素的方法。试验了硫酸、磷酸用量对测定的影响和共存离子干扰，方法相对标准偏差为１．４０％—３．２２％，回收率为９６．０％—１０８．１％。对试样进行分析，结果满意。     

Guided-Wave Two-Dimensional Acousto-Optic Scanner Using Proton-Exchanged Lithium Niobate Waveguide

Two-dimensional scanning of a 0.6328 mum guided-light beam has been realized using noncolinear acousto-optic (AO) coplanar Bragg diffraction together with colinear AO guided-mode to substrate radiation-mode conversion in a Z-cut Xpropagation LiNbO3 proton-exchanged (PE) waveguide. The two surface acoustic (SAW) waves utilized are at the center frequencies of 500 and 200 MHz, propagating in the Y and X axes, respectively. Two-dimensional scanning of approximately 720 resolvable light beam spots, namely, 18 40 (horizontal vertical) scanning, has been demonstrated using a light beam of 1.0 mm aperture. The total number of resolvable beam spots can be greatly increased from 720 by simply utilizing SAW transducers of larger bandwidth and a light beam of greater aperture. It should also be possible to significantly increase the diffraction efficiency from 3 % by optimizing the parameters of the PE waveguide and the SAWs.     

Femtosecond Transform-Limited Pulse Generation by Compensating for the Linear Chirp of SPM Spectra in Dispersion Shifted Fibers

A simple technique of pulse compression, based on the linear chirp compensation of self-phase modulation (SPM) spectra in dispersion shifted fibers, is demonstrated. The optimization procedure is carried out, for a short span of a single-mode fiber, using a parabolic law, which describes the behavior of the squared output pulse width versus the pump peak power in the case of Gaussian pulses. The experimental results give a minimum pulse duration of 233 fs, which is in good agreement with the model. Shorter and coherent pulses, down to 90 fs, have been obtained by inserting an interference filter at the optical output.     

Effect ofγ-radiation on the spectral luminescence characteristics of impure cadmium tungstate crystals

Results of a study of the effect of γ-radiation on the spectral luminescence properties of cadmium tungstate crystals doped with silver, bismuth, and molybdenum cations are presented. Spectral characteristics of the nondnnnoped crystals are briefly described. Absorption and photo and X-ray luminescence spectra of the crystals taken before and after exposure to γ-radiation (5.5·10⁴ Gy) are compared. It is found that the spectral characteristics of the crystals doped with silver, bismuth, and molybdenum cations do not change markedly after the exposure. The relation between the type of impurity-induced defects, individual characteristics of the impurity cations, and the character of the effect of γ-radiation on the spectral luminescence properties of impure crystals is analyzed (preliminarily). Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 64, No. 1, pp. 55–60, January–February, 1997.     

Sorting of bending magnets for the SSRF booster

The Shanghai Synchrotron Radiation Facility(SSRF)booster ring,a full energy injector for the storage ring,is deigned to accelerate the electron beam energy from 150MeV to 3.5GeV that demands high extraction efficiency at the extraction energy with low beam loss rate when electrons are ramping.Closed orbit distortion(COD)caused by bending magnet field uniformity errors which affects the machine performance harmfully could be effectively reduced by bending magnet location sorting.Considering the affections of random errors in measurement,both ideal sorting and realistic sorting are studied based on measured bending magnet field uniformity errors and one reasonable combination of bending magnets which can reduce the horizontal COD by a factor of 5is given as the final installation sequence of the booster bending magnets in this paper.     

Theoretical analysis and simulation of conjugate heights for dual-conjugate AO system in lidar

A multi-conjugate adaptive optics （MCAO） can offer a possibility of widening field of view （FOV） characterized by the isoplanatic angle, and the choose of conjugate height becomes a basic problem for MCAO, which influences the size of iosplanatic angle. Considering the application of lidar, the isoplanatic angle＇s expressions of two deformable mirrors （DMs） MCAO for uplink and downlink are deduced. The effects of conjugate heights for dual-conjugate AO are thoughtfully discussed, and the isoplanatic angles are further analyzed. The results show that the isopanatic angle varies with the conjugate height and reaches the maximum as the conjugate height is at the optimal altitude. Moreover, the optimal conjugate height changes with the propagation distance.     

Quick single-photon detector with many avalanche photo diodes working on the time division

Due to the limit of response speed of the present single-photon detector, the code rate is still too low to come into practical use for the present quantum key distribution (QKD) system.A new idea is put up to design a quick single-photon detector.This quick single-photon detector is composed of a multi-port optic-fiber splitter and many avalanche photo diodes (APDs).Au of the ports with APDs work on the time division and cooperate with a logic discriminating and deciding unit driven by the clock signal.The operation frequency lies on the number N of ports, and can reach N times of the conventional single-photon detector.The single-photon prompt detection can come true for high repetition-rate pulses.The applying of this detector will largely raise the code rate of the QKD, and boost the commercial use.     

Measurement of nonlinear coefficient of optical fiber based on small chirped soliton transmission

We measure the waveform and phase curves of short optical pulses before and after transmission over different lengths of fibers by use of the pulse analyzer with the frequency-resolved optical gating (FROG),and numerically simulate pulse evolution under the experimental conditions.The nonlinear coefficient of the fiber is given by comparing the experimental results with the numerical ones.Difference between the experiment and numerical simulation is analyzed.     

Resonance scattering of canonical elastic shells in absorbing fluid medium

Resonance scattering of elastic spherical shell and cylindrical shell while the surrounding fluid medium has absorption is studied. The normal mode solution derived using exact elastic theory and the separation of variables is still applicable. However, the scattering form function has to be modified for the absorbing medium, otherwise the unreasonable result would be obtained. The backscattering form function in the absorbing medium is redefined, and the form function of elastic spherical and cylindrical shell with vacuum or solid matter filled is calculated in various absorption conditions. The results show that the absorption of surrounding fluid leads to notable attenuation of the coincidence resonances in the mid-frequency, but it has a little influence on the low-frequency resonance scattering induced by the filler inside the shell.