ICP-AES法测定人发中Cu、Zn、Fe、Mn和Ca

本文报导了用ＩＣＰ－ＡＥＳ测定人发中Ｃｕ、Ｚｎ、Ｆｅ、Ｍｎ和Ｃａ的方法。确定了仪器工作条件，并对酸度等的影响进行了探讨。人发标准物质的测定值与标准值很好地吻合。     

西洋参鲜细胞中微量元素的ICP—AES方法的测定

本文应用ＩＣＰ－ＡＥＳ法同时测定西洋参鲜细胞中１４种微量元素。用硝酸－高氯酸混合消解样品。选用了仪器最佳折衷条件，并采用了干扰等效浓度消除光谱干扰。本法的准确度及密度均达到满意结果，方法简便，快速。     

西洋参鲜细胞中微量元素的ICP－AES方法的测定

本文应用ＩＣＰ－ＡＥＳ法同时测定西洋参鲜细胞中１４种微量元素。用硝酸－高氯酸混合消解样品。选用了仪器最佳折衷条件，并采用了干扰等效浓度消除光谱干扰。本法的准确度及精密度均达到满意结果，方法简便，快速。     

原子吸收和电感耦合等离子体发射光谱法测定某些重要的埃及植物

本文讨论了用原子吸收和电感耦合等离子体发射光谱法（ＩＣＰ－ＡＥＳ）测定经高压釜溶解的营养性埃及植物，如胡芦巴、甘草和莲座丛，并讨论了该法用于被消解植物样品中多元素日常分析的优点。这些样品具有较宽的元素含量范围，准确地测定这些营养性样品的主量和微量元素特别是有毒元素，对埃及人民的健康非常重要。ＩＣＰ－ＡＥＳ法同时也用于被视为尼罗河净化剂的水生风信子的分析。分析结果表明，该植物能够有效地吸收有毒元素。被研究的植物经高压釜溶解，其溶液经原子吸收和ＩＣＰ－ＡＥＳ法测定。作者对分析结果进行了对比，并阐明了二者之间的关系。     

ICP-AES法同时测定人血清中16种元素含量

本文探讨了用电感耦合等离子体原子发射光谱（ＩＣＰ－ＡＥＳ）法同时测定了人血清中Ｎａ、Ｋ、Ｃａ、Ｍｇ、Ｃｏ、Ｍｏ等１６种元素的方法。采用工艺超纯硝酸消化,基体匹配消除干扰。本法最低检出限能满足血清样品的测定要求,回收率在９５％－１０６％之间,对探索血清微量元素与疾病的关系有着重要意义。     

微波溶样ICP-MS测定海产品中十六种元素

本文利用微波消解ＩＣＰ－ＭＳ法测定了海产品种Ｎａ、Ｍｇ、Ａｌ、Ｐ、Ｃｒ、Ｍｎ、Ｆｅ、Ｎｉ、Ｃｕ、Ｚｎ、Ａｓ、Ｓｒ、Ｍｏ、Ｃｄ、Ｐｂ、Ｈｇ,并利用国家标准物质贻贝ＧＢＷ０８５７１验证了方法的准确度,测定值与标准值吻合,同时用多内标法有效地校正了基本干扰。方法简便、快速、准确、可靠。     

ICP—AES法测定人体血清中的Al,Be,Cu,Mn,Mo,V

建立了用ＩＣＰ－ＡＥＳ同时测定人体血清中的Ａｌ，Ｂｅ，Ｃｕ，Ｍｎ，Ｍｏ，Ｖ等六种元素的方法。在我们的设备上，检出限对Ａｌ，Ｃｕ，Ｍｏ为１－３μｍｏｌ／Ｌ，而对Ｂｅ，Ｍｎ，Ｖ为０．１－０．３μｍｏｌ／Ｌ。这六种元素的回收率在１００±２０％之间。     

用Monte Carlo模拟方法研究ICP－AES中的物理化学过程──Ⅲ．操作参数的优化

基于ＭｏｎｔｅＣａｒｌｏ方法的模拟结果，详细讨论了ＩＣＰ－ＡＥＳ各操作参数对有用质量传输速率Ｗｕ的影响情况，并以Ｗｕ作为评价ＩＣＰ－ＡＥＳ分析性能的依据，从而得到最佳的操作条件。     

用Monte Carlo模拟方法研究ICP—AES中的物理化学过程：Ⅲ.操作…

基于Ｍｏｎｔｅ Ｃａｒｌｏ方法的模拟结果，详细讨论了ＩＣＰ－ＡＥＳ各操作参数对有用质量传输速率Ｗｕ的影响情况，并以Ｗｕ作为评价ＩＣＰ－ＡＥＳ分析性能的依据，从而得到最佳的操作条件。     

ICP-AES法测定青壳鸡蛋中的13种元素

用高压消化罐消解后,ＩＣＰ－ＡＥＳ法同时测定青壳鸡蛋中Ｃａ、Ｍｇ、Ｆｅ、Ｍｎ、Ｚｎ、Ｃｕ、Ｐ、Ｉ、Ｓｅ、Ｓｂ、Ｂａ、Ｃｒ、Ｃｄ等１３种元素的含量,在优化实验条件下,ＲＳＤ为１．２４％－８．７６％,加标回收率为９３．０％－１０５．９。方法简便、可靠,结果令人满意。     

微波消解ICP-MS测定尿样中硒及其他重金属元素

建立微波消解电感耦合等离子体-质谱法(ICP-MS)同时测定尿样中硒及铬、镉、砷、铅、锰、钴、镍、铜、锌10种重金属元素的方法。采用硝酸-过氧化氢消解体系,微波消解法制备样品.以铟、铋为内标物质,直接用ICP-MS测定上述10种元素。所测10种元素的检出限为0.006-0.073μg/L,校准曲线线性关系好(r>0.9999),相对标准偏差(RSD)均小于3%,对尿样标准物质的测定值均在标准参考值范围内。应用微波消解ICP-MS分析尿样,方便快捷,灵敏度高,检出限低,重现性好,是理想的生物样本检删分析方法。     

Human-to-metal electrostatic discharge current measurements – Notes on the ESD current waveform

The Electrostatic Discharge (ESD) phenomenon has been described through the IEC 61000-4-2. ESD current parameters' values, have been set in this Standard. The theoretical ESD current waveform defined in this standard, describing the conventional Contact discharge mode, needs to be re-evaluated on the basis of accurate experimental data. Even though the standard deals with commercial ESD generators, its goal is to simulate the natural phenomenon as good as possible. More and accurate data may contribute to the better simulation of the natural phenomenon. New values and better comprehension of the phenomenon demand new measurements based on high end measuring equipment. Such works and publications have been carried out the past years. Yet, the need to systematize and integrate this work remains. Larger and trust-worthy series of measurements need to be carried out and presented clearly.This paper deals with new ESD-current data, taken with broadband equipment. New and more detailed measurements like these, were never before taken at such a large number of individuals. The goal of this work is that the data acquired can serve as a basis for re-evaluating the conventional approach of the scientific community to the ESD event.In this paper, using a broadband measuring system, new parameters' values are measured and relations are presented, following standard statistical procedures. The results, which occur from measurements carried out on tenths of human individuals, are questioning the Standard in many points. A new way of approaching the standardization of the ESD current is proposed, as the excuse of the poor measuring equipment that sets barriers on the measuring accuracy, does not apply any more. The charging voltages of 500 V and 1000 V were also examined since such range of voltages are often met at ESD events and they are considered very harmful.     

倾斜管式液体粘度测量方法理论及实验研究

本文提出了一种适用于高压下及低沸点物质液相粘度的测量方法-倾斜管式粘度测量方法,并设计和搭建了粘度测量系统.采用粘度测量系统标定的标准物质-纯水,通过测量其运动粘度,对该测量系统进行了检测.结果显示,该测量系统的相对偏差绝对平均值为0.65%,验证了该方法原理的正确性及测量系统的准确性.此外,测量了R134a饱和液体的运动粘度,进一步检测了该粘度测量系统.     

Direct determination of glucose, lactate and triglycerides in blood serum by a tunable quantum cascade laser-based mid-IR sensor

This work reports on a compact sensor for fast and reagent-free point-of-care determination of glucose, lactate and triglycerides in blood serum based on a tunable (1030–1230 cm^?1) external-cavity quantum cascade laser (EC-QCL). For simple and robust operation a single beam set-up was designed and only thermoelectric cooling was used for the employed laser and detector. Full computer control of analysis including liquid handling and data analysis facilitated routine measurements. A high optical pathlength (>100 μm) is a prerequisite for robust measurements in clinical practice. Hence, the optimum optical pathlength for transmission measurements in aqueous solution was considered in theory and experiment. The experimentally determined maximum signal-to-noise ratio (SNR) was around 140 μm for the QCL blood sensor and around 50 μm for a standard FT-IR spectrometer employing a liquid nitrogen cooled mercury cadmium telluride (MCT) detector. A single absorption spectrum was used to calculate the analyte concentrations simultaneously by using a partial-least-squares (PLS) regression analysis. Glucose was determined in blood serum with a prediction error (RMSEP) of 6.9 mg/dl and triglycerides with an error of cross-validation (RMSECV) of 17.5 mg/dl in a set of 42 different patients. In spiked serum samples the lactate concentration could be determined with an RMSECV of 8.9 mg/dl.     

Profiling the immune responses of human patients treated with recombinant streptokinase after myocardial infarct

The SPOT synthesis of peptide arrays on continuous cellulose membranes should be generally applicable in the analysis of sequential antibody binding sites using the enzyme-substrate or other standard detection protocols. The use of total serum is limited by the occurrence of high background levels. This may be overcome if affinity purified antibodies or sera with high antibody titers are used, which allows work at high dilutions and a consequent reduction of background level. Here we demonstrate the mapping of antigenic regions located on recombinant streptokinase SK-2 (Heberkinase) using cellulose-bound peptide scans and human total sera from patients treated with SK-2 (Heberkinase). Streptokinase (SK) is a 47 kDa protein produced by various strains of hemolytic streptococci and is a potent activator of the fibrinolytic enzyme system in humans. SK is in widespread clinical use to treat acute infarction because of its function as an activator of vascular fibrinolysis. Since streptococcal infections are common, normal individuals are immunized with SK and antibodies (Abs) to SK can be detected in most of them. This therapy generates significant T-cell responses to SK and the neutralizing capacity of the Abs rises significantly. Neutralizing Abs reduces the efficiency of thrombolytic therapy and may cause allergic reactions. The widespread use of SK in humans makes its antigenicity an important clinical problem. In this regard the study of the immunodominant regions of SK becomes an important aspect for the improvement of this thrombolytic agent.     

补体4的免疫共振散射光谱分析

在pH 7.3 Na₂HPO₄-KH₂PO₄缓冲溶液中及聚乙二醇-6000存在下,补体4(C4)与羊抗人补体4(goat anti-human C4)通过库力引力、范德华力、氢键结合力、疏水等作用力发生免疫反应,可聚集形成疏水的免疫复合物微粒,该微粒在350,390,440 nm有3个共振散射峰。激光散射法测得免疫复合物微粒的平均粒径为3 440.0 nm。分别研究了pH、羊抗人补体4和PEG浓度、温育时间和温度、共存物质的影响。在最佳条件下,补体4(C4)浓度在0.18～2.60 μg·mL-1范围内与350,390 nm处的散射强度均呈线性关系,其回归方程、相关系数、检出限分别为ΔI_{350 nm}=28.23c+9.17,ΔI_{390 nm}=31.36c+11.08, 0.993 9,0.992 3, 0.084 μg·mL-1,0.11 μg·mL-1。该法用于分析人血清中补体4(C4),结果与免疫透射比浊法结果一致,相对标准偏差在1.88%～4.36％,具有简便快速、灵敏度高、选择性好等特点,在临床检验上具有一定的应用价值。     

表面光散射法正十六烷高温热物理性质研究

为拓展高温下流体黏度和表面张力的测量,改进了原有的表面光散射实验系统,将实验的温度区间拓展至570K,改进后的系统在整个温区内测量黏度和表面张力的扩展不确定度分别为2%和1%(k=2)。利用新的实验系统研究了正十六烷在353~547 K温度范围内的黏度和表面张力,并利用实验数据分别拟合了温度倒数多项式和van der Waals方程,在全温度范围内实验值与方程的偏差均在1%之内。在较宽的温度范围内获得的正十六烷的高精度黏度和表面张力数据和方程,可以作为参考数据和方程,用于相关仪器的标定和检验。     

DSC and X-ray diffraction studies of HxBPA

A detailed DSC study has been done for the substance HxBPA in the temperature range 170 to 380 K and the scheme of transitions in this compound has been deduced. From X-ray work, values for the smectic layer thickness and inplane intermolecular distance have been found in two of the liquid crystalline phases, P₂ and S_H.     

微波消解-ICP-MS测定胃癌和癌旁组织中的微量元素

采用微波消解技术,建立了人体胃组织中22种微量元素含量的ICP-MS测定方法.样品经恒温干燥后,采用硝酸-过氧化氢体系微波消解,优化ICP-MS得到最佳工作参数,测定时以Ge,Rh作为内标来校正由于基体效应和信号漂移对测量造成的影响.该方法的回收率为94.7％-105.6％,相对标准偏差为2.9％-13.4％,检出限为...     

容积式制冷机组性能测试的一种改进实验装置

针对容积式压缩机组测试设备的初始投资高,能耗高的问题,介绍了一种改进的实验装置.其制冷量测量采用制冷剂液体流量计法。研究测试结果表明:(1)改进实验装置控制精度较高;(2)改进的实验装置的相对误差为1.5%。与房间量热计相比,该实验装置节能72.2%且初始投资节省60%。