共查询到19条相似文献,搜索用时 93 毫秒
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《分析测试技术与仪器》2010,16(1):16-16
仪器新品代表了当前及未来一段时间仪器最新技术的发展方向和相关应用领域的最新需求.为了让广大用户及时全面地了解每年推向市场的仪器新品,仪器信息网于2004年开通了新品栏目,该栏目自开通以来已经向广大仪器用户及时、全面地展示了约1000台当年在中国市场上推出的最新仪器及设备.2009年12月新品栏目进行了全面改版,目前其基本功能如下: 相似文献
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在大型仪器分析实验教学中,为了提升学生对基础知识的运用能力,提高学生的动手能力、创新能力,通过引入培训、教学双模式,建立了大型仪器多层次(即基础理论培训、上机操作技术培训和仪器功能应用培训)培训体系。实践证明这种多层次培训体系搭建了学生与专家、学者之间交流的平台。从理论讲解到操作,再到应用的多层次培训体系有效地弥补了大型仪器实验教学中单一教学模式存在的不足,可以很好地培养本科生和研究生的学习兴趣,提高学生分析问题、解决问题的科研能力,同时提升了仪器使用效率,储备了大量仪器方面的专业人才。 相似文献
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《分析测试技术与仪器》2011,(1):22-22
售后服务,不仅涵盖了商品的质量保障、维修保养、零部件供应等一系列内容,还涉及企业信用、品牌美誉度等.随着中国仪器市场的不断扩大与逐渐成熟,广大仪器企业所提供的售后服务质量存在参差不齐的现象,仪器用户对售后服务环节变得越来越为关注,近年来,仪器信息网”仪器论坛”有关售后服务的发帖量呈上升趋势. 相似文献
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这次会议是首次全国性的研讨仪器维修工作的会议。几天来,代表们充分地交流了经验,发表了见解,现在,就要圆满结束了。根据会议反映的情况,我谈谈对仪器维修工作的几点看法。一、关于仪器维修在整个分析测试管理工作中的地位大型分析测试仪器是电子、电子计算机、精密机械、激光、超真空、超导等多种现代科学技术的综合 相似文献
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采用网络调查法,由浙江科技大脑、巨潮资讯网、浙江省大型科研仪器开放共享平台分别获取了浙江省国产仪器研制项目立项情况、全国仪器仪表行业A股上市企业情况及浙江省国产科研仪器应用现状,并对获取的数据进行了分析,进而梳理了浙江省国产科研仪器发展现状,指出了目前存在的问题,提出了相应的对策建议. 相似文献
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再论中国分析仪器的十大关系 总被引:3,自引:0,他引:3
李昌厚 《分析测试技术与仪器》2002,8(4):193-198
再次论述了我国分析仪器振兴、发展和赶超国际先进水平所必须注重的十大关系,可供分析仪器的制造者、使用者和有关的领导者参考。 相似文献
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报导了一种静态法BET表面积测定仪的研制和开发,叙述了此仪器的设计原理,基本结构和特点,介绍了仪器的操作使用方法,并给出了此仪器的实验结果,通过与其它同类仪器实验结果的对比以及重复性实验,证明此仪器具有良好的准确性和稳定性。 相似文献
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T. Burr M. S. Hamada T. Cremers B. P. Weaver J. Howell S. Croft S. B. Vardeman 《Accreditation and quality assurance》2011,16(7):347-359
An approach to estimating measurement error variances for any instrument having round-off effects that might also have instrument
bias is presented. Recently finite instrument resolution effects on error variances have been studied, but negligible instrument
bias was assumed and the contexts were different than considered here. Our intent is to use repeated measurements on several
standards to estimate the instrument’s random and systematic error variances. Recognizing that rounding impacts item bias
and variance in a manner that depends on the true value, an approach is presented to estimate random error variance and instrument
systematic error variance. The key finding is that item-specific bias can interfere with the estimation of overall instrument
bias unless appropriate error modeling and associated inference steps are taken. 相似文献
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纳米孔道分析技术是一种基于电化学空间限域效应的单分子检测技术。测量纳米孔道产生的单分子皮安级微弱电流信号对电化学测量仪器的电流分辨、时间分辨和抗噪音能力提出了挑战。Cube纳米孔道电化学测量仪器通过设计频率补偿电路、前置电流放大器测量系统和基于现场可编程逻辑门阵列(FPGA)的高速数字处理电路,实现了便携式超灵敏电化学测量仪器对微弱电流信号的高时间分辨、高电流分辨,以及低噪音的放大、采集和快速处理。稳定性是仪器能够应用于实际单分子测量分析的重要衡量指标之一。该文通过高阻值电阻对该仪器进行稳定性测试,在截止滤波频率为5、10、100 kHz条件下,Cube纳米孔道仪器获取的电流基线的噪音均方根(RMS)值分别比商品化仪器减小了80.0%、87.5%、48.2%,证明Cube纳米孔道仪器抑制噪音能力更强,电流分辨能力更好,仪器测量稳定性更佳。进一步通过统计比较施加电压值的实际值和标准偏差,结果显示该仪器施加电压误差小,其仪器施加电压标准偏差仅为施加电压变化量(10 mV)的0.14%。同时,通过Aerolysin纳米孔道检测Poly(dA)4的实验,对比Cube仪器和商品化仪器在不同施加电压下获取的单分子信号残余电流程度,得到两者误差均小于0.01,结果具有可重复性。因此,Cube纳米孔道仪器具有稳定性好、灵敏度高、便携性强的特点,可应用于纳米孔道单分子分析。 相似文献
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介绍FIA-33A型磷酸根自动分析仪的基本原理及其在实际应用中易出现的一些问题和故障,提出了FIA-33A型磷酸根自动分析仪使用过程中应注意的事项和维护方法。 相似文献
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Bereman MS Lyndon MM Dixon RB Muddiman DC 《Rapid communications in mass spectrometry : RCM》2008,22(10):1563-1566
We report a direct comparison of the mass measurement accuracies (MMAs) obtained on different mass spectrometry instrument types; a magnetic sector as the 'gold standard' and an electrospray ionization time-of-flight (ESI-TOF) instrument. Sixty samples, obtained from the Department of Chemistry at North Carolina State University, were analyzed on each instrument. Data are presented and compared between the different instruments. The average absolute MMAs achieved for the magnetic sector and Agilent ESI-TOF mass spectrometers were 3.0 and 1.1 ppm, respectively. 相似文献
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A new triple-quadrupole mass spectrometry (MS) system with enhanced resolution capabilities has recently become available. In order to evaluate the performance of this new instrument for drug discovery assays, both the linearity and the limit of detection were compared in the positive electrospray ionization (ESI) mode with those of a conventional triple-quadrupole instrument supplied by the same manufacturer. For these studies, spiked mouse plasma standard samples were split and assayed by each instrument, which allowed for a direct comparison of the two systems. In the unit mass resolution mode, the new mass spectrometer was found to be at least ten-fold more sensitive than the conventional instrument. The sensitivity of the new mass spectrometer under the enhanced mass resolution mode was found to be even better by another factor of two. For the test compound, the linear dynamic range was found to be 0.05-5000 ng/mL for the new instrument as compared with 2.5-5000 ng/mL for the conventional mass spectrometer. 相似文献
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Near-infrared calibrations for water, reducing sugar, glycerin, propylene glycol, nicotine, and menthol in tobacco blends were first obtained with a monochromator instrument. Transfer of calibrations to a tilting-filter instrument for factory trials is shown to be facilitated greatly by the computer-assisted scheme MTRAN. By means of this software, calibration equations were established for a Neotec 51A instrument that is sufficiently rugged for factory use. The predictive capabilities of the transferred calibrations are similar to those of the research monochromator. 相似文献