双向逆止器

Agilent 5900 同步垂直双向观测 (SVDV) ICP-OES 通过一系列操作、性能和分析效率方面的改善，颠覆了传统双向观测 ICP-OES 概念。专为希望高效运行样品，并使每个样品分析的成本降到最低的高样品通量实验室而设计。5900 SVDV ICP-OES 包括独特的智能光谱组合 (DSC) 技术，该技术可在单次测量中采集并组合垂直等离子体发出的全波段范围内的轴向和径向光。5900 还包括高速Vista Chip II CCD 检测器和集成的 AVS 6/7 高级阀系统切换阀作为标配。这三种技术的结合造就了分析单个样品速度最快、气体消耗量最小的 ICP-OES。水平观测垂直炬管和冷锥接口 (CCI) 等其他功能使 5900 能够分析高盐样品、挥发性有机溶剂和腐蚀性样品基质。凭借在宽线性动态范围 (LDR) 内分析多个元素的能力，最大程度减少了额外的样品稀释或同一样品多次读数的需要，进一步提高了样品通量。5900 SVDV ICP-OES 出色的稳定性可确保减少样品重新测量的需求，并最大程度缩短仪器停机时间。

采用美国Artium 公司的PDI-200型相位多普勒粒子干涉仪，对燃气轮机燃烧室新型双相空气喷射器喷雾的液滴粒径和SMD的空间分布及其与燃料的位置关系进行了实验测量研究。

"为了保护公共健康和环境，动物性食品产品中各种元素（包括营养元素、微量营 养元素和有毒元素）的测定必须遵守国家或国际监管机构的规定。例如，联合国 粮农组织 (FAO) 和世贸组织 (WTO) 成立了食品法典委员会，制定了统一的国际食品标准、指南和操作规范，各国通常以此为立法的基础。需要遵循监管框架的食 品检测实验室必须在日常分析中监测大量样品的各种指定元素。ICP-OES 仪器以其可靠性和易用性，已广泛用于许多食品检测实验室。不过，Agilent 5100 同步垂直双向观测 (SVDV) ICP-OES 技术的操作水平和性能更胜一筹，尤其体现在它的稳定性、分析速度和较低的运行成本方面。Agilent 5100 使用的 ICP Expert 软件配有包含预设方法模板的软件程序，可快速、简单地进行方法开发。DSC 智能光谱组合技术进一步简化了方法开发，无需针对样品中的元素选择等离子体观测模式。操作人员仅需选择测量元素和波长，仪器会自动完成测量模式的切换，全谱一次曝光，一次分析完成。例如，样品中百分含量水平的营养元素（如钠和钾）可通过垂直观测分析，而 ppm 或 ppb 水平的其他元素（如铜或锌）可在同一次读数中通过水平观测分析，从而实现对宽浓度范围内的所有元素进行分析。仅需对样品进行 1 次测量，而传统双向观测仪器需要 2 次、3 次，甚至 4 次测量。"

PVA薄膜根据所用PVA树脂的聚合度、醇解度的不同以及加工生产方法不同，可分为以下3大类型：水溶性PVA薄膜、难溶性PVA薄膜和双向拉伸PVA薄膜.由于PVA薄膜具有众多优良的特性，现已被广泛的应用于各个领域，市场十分广阔，目前，PVA薄膜主要广泛应用于我国农业、食品等行业的包装材料。就现在行业中PVA薄膜的使用情况，Labthink兰光将在本文中结合VAC系列压差法气体渗透仪、有机气体透过率测试系统、智能电子拉力试验机、热缩试验仪等检测仪器，着重介绍双向拉伸PVA薄膜的质量控制检测技术。了解关于更多相关仪器信息，您可以登陆济南兰光公司网站查看具体信息或致电0531-85068566咨询。Labthink兰光期待与行业中的企事业单位增进技术交流与合作。

NR/R双向电泳的基本原理是根据LaemmLi的SDS电泳原理设计的，NR指的是非还原相，R指的是还原相。SDS聚丙烯酰胺凝胶电泳可将不同相对分子质量的蛋白质按相对分子质量大小分离开来。NR/R双向对角线电泳的第一向是在非还原条件下的SDS电泳，电泳结束后将胶条切下，置于含 2-硫基乙醇的样品处理液中处理，使其-S-S-键被还原断裂，将处理后的胶条置于第二向SDS电泳槽的夹层中凝胶上方，然后进行第二向电泳。电泳结果中凡是即无链内二硫键又无链间二硫键的蛋白质均处于对角线上，凡含有链间二硫键的蛋白质，因二硫键断裂，使两条或两条以上的肽链分开，相对分子质量变小，迁移率加大，而出现在对角线的下方，凡含有链内二硫键的蛋白质，因二硫键断裂，而使肽链松散，迁移率降低，而出现在对角线的上方。

将干燥剂放入清洁的杯皿中，其加入量应使干燥剂距试样表面约3mm为宜。2.将盛有干燥剂的杯皿放入杯子中，然后将杯子放到杯台上，试样放在杯子正中，加上杯环后，用导正环固定好试样的位置，再加上压盖。

针对上一代探空仪检定用低压环境模拟舱压力控制系统控制精度和稳定性差、压力传感器和控制系统配置不合理等问题，用户提出升级改造要求。本文介绍了新一代低压环境模拟舱压力控制系统的实施方案，采用了双向控制模式，进行了方案验证试验，试验结果证明控制精度和稳定性都大幅提高。

不同等级的钢具有不同的元素含量指标，大多数钢和不锈钢等级规定 硫的重量百分比小于 0.05%，且磷的重量百分比小于 0.04%。利用电 感耦合等离子体发射光谱 (ICP-OES) 技术能够轻松测量样品中这一浓度范围内的元素，实验室从期望能否“完成工作”进一步考虑特定仪 器能否提高其样品通量、降低成本、简化样品前处理和仪器运行，以 及能否在大批样品分析过程中提供可靠的结果。本应用简报证明了 Agilent 5100 垂直双向观测 (VDV) ICP-OES 仪器在使用 GB/T 20125-2006 方法分析钢铁样品时的性能和优势。该仪器在这一应用中具有许多优势，包括能够快速分析大量具有挑战性的钢铁样品。

摘要:高速逆流色谱所具有的诸多优点,使其在过去的几十年间从理论研究到实际应用均获得了长足的发展.溶剂体系的筛选和洗脱模式的设置对于高速逆流色谱的分离是最为关键和重要的环节,本文根据高速逆请色谱溶剂体系的要求、筛选方法及梯度洗脱、双向洗脱、循环洗脱、推挤洗脱四种洗脱模式的原理、应用范围等进行了综述,以期为高速逆流色谱研究者提供相关参考

采用LaVision公司的2D-PIV系统和Artium公司相位多普勒粒子干涉仪，对一种新型燃气轮机燃烧室双相喷射器的喷雾特性和速度分布特性进行了实验测量和研究。

太阳模拟器设计为产生高度准直的光，并被开发为在真空室内运行。一家太空机构的研究人员与Sciencetech联络，以定制设计一种能够放置在真空室内的大功率准直太阳模拟器。该太阳能模拟器将成为一个更大的系统的一部分，该系统旨在在受控实验室中模拟地球外环境。

针对目前国内外市场上TEC温控器控温精度差、无法进行程序控温、电流换向模块体积大以及造价高的现状，本文介绍了低成本的超高精度PID控制器。24位模数采集保证了数据采集的超高精度，正反双向控制功能及其小体积大功率电流换向模块可用于半导体制冷、液体加热制冷循环器和真空压力的正反向控制，程序控制功能可实现按照设定曲线进行准确控制，可进行PID参数自整定并可存储多组PID参数。

本文介绍了使用微焦X射线检查装置Xslicer SMX- 6010，对逆变器零部件（IGBT模块）内部进行无损观察的案例。

仪器装置红外透湿仪示意图见图2，透湿仪由湿度调节装置、测试腔、红外检测器、干燥管及流量表等组成。高湿腔的湿度调节可采用载气加湿的方式或饱和盐溶液的方式调节，红外检测器与低湿腔相连测定水蒸气浓度。红外传感器对水蒸气的灵敏度至少为1 ug/L或1 mm3/dm3。

客户的一些成员有使用Sciencetech的高度准直太阳模拟器的经验。对于一个在发射前测试卫星传感器的新项目，他们需要一个更大、更*特的版本。于是咨询我们，需要一个在辐照度、准直角度和光谱匹配方面与太阳非常接近的太阳模拟器。此外，他们希望自动化操作太阳模拟器在X, Y, Z和2个旋转角度。初步的讨论考虑了几个自动化实现和初步的工程分析，确定氙短弧灯的物理限制将使其非常具有挑战性，以满足所需的规格的准直和其他标准。Sciencetech确定了一种方法来实现重要的规格，并将其呈现给客户。指导方针和标准获得批准，Sciencetech开始了项目的设计。

超低重力仪器中要求液氦池温度恒定，为实现小于0.1mK的波动度，气压控制的波动度要小于10Pa。为此本文提出了相应技术方案，核心内容是实现缓冲罐的气压精密控制，采用了双向控制模式，并使用了万分之一精度的气压传感器、电动针阀和PID控制器。

本文研究表面沉积2mg/cm2氯化钠的2205双相不锈钢(2205DSS)在500vppmNaCl(g)流动气氛加热炉内550～850℃下之高温腐蚀. 只做学术交流，不做其他任何商业用途！版权归原作者所有！

本文用PQ9000按两个新定国家标准的征求意见稿检测了汽油中的硅。实验表明，标准曲线拟合系数为0.99997～0.9999991；RSD≤1.29%；两法所测方法检出限为2～3μg/kg，灵敏度高 ；同一元素不同谱线之间、两个平行样之间和两个方法之间的结果一致，两法都能测准汽油中硅；样品加标回收率为106%，标准点回收率为97%；短稳RSD=0.18%，长稳RSD=1.5%；有机直接进样需要垂直炬管，双向观测和较高的轴向观测灵敏度。

摘要：空调换热器需要进行可靠性试验以满足整机产品在不同环境下的寿命周期，温度交变试验是可靠性试验中是较为关键的一项。本文在现有PLC交变温度控制技术基础上，提出了一种模块式的改进解决方案，即增加了专用的高精度PID调节器分别进行热水箱和冷水箱的温度控制，特别是采用具有冷热双向控制功能的PID调节器，在提高控温精度的同时，主要是能够大幅减小PLC控制器的软硬件复杂程度和编程工作量，更重要的是此方案可推广应用到其它任何形式的温度波和压力波的形成。

山东普创工业科技有限公司NLY-20瓶盖扭矩测试仪是针对国家对包装用瓶盖的相关标准设计的一款专用仪器。适用于检测西林瓶、饮料瓶、矿 泉水瓶、奶瓶、油桶等包装产品瓶盖锁紧与开启的扭矩值，NLY-20适用于标准圆形或标准对称形状的包装容器的瓶盖扭 矩检测，可实现顺时针、逆时针旋转双向测试扭矩力，自动记录最-大扭矩力值。扭矩测试仪广泛应用于质检机构、食 品、药品、化妆品等行业。

摘要：本文用HR-PQ9000 ICP、标准加入校正法、轴向观测测试了20%NaSO4工业废液中的痕量重金属镍含量。测试表明，虽然试液浓度低，加标浓度也低，硫酸盐对信号的抑制作用极强，但曲线拟合好，R=0.997～0.99998， RSD小，同一元素不同分析线比对结果较好，光谱图显示没有光谱干扰。充分证明了PQ9000垂直炬管双向观测的高分辨率、高灵敏度、高稳定性和高适用性，尤其适合该类复杂样品的检测。

摘要：本文用HR-PQ9000 ICP、标准加入校正法、轴向观测测试了20%NaSO4工业废液中的镍等痕量重金属含量。测试表明，虽然试液浓度低，加标浓度也低，硫酸盐对信号的抑制作用极强，但曲线拟合好，R=0.997～0.99998， RSD小，同一元素不同分析线比对结果较好，光谱图显示没有光谱干扰。充分证明了PQ9000垂直炬管双向观测的高分辨率、高灵敏度、高稳定性和高适用性，尤其适合该类复杂样品的检测。

沿产品纵、横向裁取长度为150 mm,宽度为15 mm 的长条形试样各5个，试样的标距为( 100土1 ) mm。拉伸速度为(100士10)mm/min,记录试样拉断时的最大负荷和标线间的伸长值。拉断力以5个试样拉断力的算术平均值表示,精确至1 N

绿色转型之路：某水泥企业超低排放项目的成功实施以一水泥企业为例，智易时代通过深入调研和精准施策，成功助力其实施超低排放改造项目。某水泥企业作为当地重要的工业支柱，一直积极响应国家环保政策，致力于推进超低排放改造工作。在智易时代的助力下，该企业成功实施了超低排放项目，实现了水泥生产全过程的污染物有效控制。

The determination of the elemental composition in plants is important for development, growth and maintenance of plant tissues. Elements, such as Al, B, Ba, Ca, Cu, Fe, K, Mg, Mn, S, Sr, P, and Zn, are important for plant nutrition, being vital nutrients required for tissue development, maintenance and plant metabolism [1]. The determination of macro, micronutrients and contaminants in plant samples is important to keep up with sources of nutrients and minerals. The chemical analysis of plant materials can be applied to assist in the remediation of contaminated soils or to solve mineral malnutrition, a problem that seriously affects the human population [2, 3]. Inductively coupled plasma optical emission spectrometry (ICP-OES) is an attractive technique for this analysis because it can accommodate the wide concentration ranges typical of macro and micronutrients in plants. 2 Agronomical laboratories typically deal with large batches of samples. Several critical elements, in wide concentration ranges, must be determined on a routine basis for such samples. The Agilent 5100 Synchronous Vertical Dual View (SVDV) ICP-OES with Dichroic Spectral Combiner (DSC) technology, has the ability to keep up with these demands, performing axial and radial measurements in a single reading, leading to faster sample throughput times. With faster sample run times, the 5100 SVDV requires less argon per sample, meaning significant savings can be made for labs involved in high throughput analysis. The Vista Chip II detector used in the 5100 ICP-OES has the fastest processing speed (1 MHz) of any charge coupled device (CCD) detector used in ICP-OES. It delivers fast warm-up, high throughput, high sensitivity, and the largest dynamic range. This application note describes the quantitation of Al, B, Ba, Ca, Cu, Fe, K, Mg, Mn, P, S, Sr and Zn in microwave acid digested alfalfa, corn and sugarcane samples and an apple leaves certified reference material (SRM NIST 1515), using the Agilent 5100

The determination of the elemental composition in plants is important for development, growth and maintenance of plant tissues. Elements, such as Al, B, Ba, Ca, Cu, Fe, K, Mg, Mn, S, Sr, P, and Zn, are important for plant nutrition, being vital nutrients required for tissue development, maintenance and plant metabolism [1]. The determination of macro, micronutrients and contaminants in plant samples is important to keep up with sources of nutrients and minerals. The chemical analysis of plant materials can be applied to assist in the remediation of contaminated soils or to solve mineral malnutrition, a problem that seriously affects the human population [2, 3]. Inductively coupled plasma optical emission spectrometry (ICP-OES) is an attractive technique for this analysis because it can accommodate the wide concentration ranges typical of macro and micronutrients in plants. 2 Agronomical laboratories typically deal with large batches of samples. Several critical elements, in wide concentration ranges, must be determined on a routine basis for such samples. The Agilent 5100 Synchronous Vertical Dual View (SVDV) ICP-OES with Dichroic Spectral Combiner (DSC) technology, has the ability to keep up with these demands, performing axial and radial measurements in a single reading, leading to faster sample throughput times. With faster sample run times, the 5100 SVDV requires less argon per sample, meaning significant savings can be made for labs involved in high throughput analysis. The Vista Chip II detector used in the 5100 ICP-OES has the fastest processing speed (1 MHz) of any charge coupled device (CCD) detector used in ICP-OES. It delivers fast warm-up, high throughput, high sensitivity, and the largest dynamic range. This application note describes the quantitation of Al, B, Ba, Ca, Cu, Fe, K, Mg, Mn, P, S, Sr and Zn in microwave acid digested alfalfa, corn and sugarcane samples and an apple leaves certified reference material (SRM NIST 1515), using the Agilent 5100

The determination of the elemental composition in plants is important for development, growth and maintenance of plant tissues. Elements, such as Al, B, Ba, Ca, Cu, Fe, K, Mg, Mn, S, Sr, P, and Zn, are important for plant nutrition, being vital nutrients required for tissue development, maintenance and plant metabolism [1]. The determination of macro, micronutrients and contaminants in plant samples is important to keep up with sources of nutrients and minerals. The chemical analysis of plant materials can be applied to assist in the remediation of contaminated soils or to solve mineral malnutrition, a problem that seriously affects the human population [2, 3]. Inductively coupled plasma optical emission spectrometry (ICP-OES) is an attractive technique for this analysis because it can accommodate the wide concentration ranges typical of macro and micronutrients in plants. 2 Agronomical laboratories typically deal with large batches of samples. Several critical elements, in wide concentration ranges, must be determined on a routine basis for such samples. The Agilent 5100 Synchronous Vertical Dual View (SVDV) ICP-OES with Dichroic Spectral Combiner (DSC) technology, has the ability to keep up with these demands, performing axial and radial measurements in a single reading, leading to faster sample throughput times. With faster sample run times, the 5100 SVDV requires less argon per sample, meaning significant savings can be made for labs involved in high throughput analysis. The Vista Chip II detector used in the 5100 ICP-OES has the fastest processing speed (1 MHz) of any charge coupled device (CCD) detector used in ICP-OES. It delivers fast warm-up, high throughput, high sensitivity, and the largest dynamic range. This application note describes the quantitation of Al, B, Ba, Ca, Cu, Fe, K, Mg, Mn, P, S, Sr and Zn in microwave acid digested alfalfa, corn and sugarcane samples and an apple leaves certified reference material (SRM NIST 1515), using the Agilent 5100

The determination of the elemental composition in plants is important for development, growth and maintenance of plant tissues. Elements, such as Al, B, Ba, Ca, Cu, Fe, K, Mg, Mn, S, Sr, P, and Zn, are important for plant nutrition, being vital nutrients required for tissue development, maintenance and plant metabolism [1]. The determination of macro, micronutrients and contaminants in plant samples is important to keep up with sources of nutrients and minerals. The chemical analysis of plant materials can be applied to assist in the remediation of contaminated soils or to solve mineral malnutrition, a problem that seriously affects the human population [2, 3]. Inductively coupled plasma optical emission spectrometry (ICP-OES) is an attractive technique for this analysis because it can accommodate the wide concentration ranges typical of macro and micronutrients in plants. 2 Agronomical laboratories typically deal with large batches of samples. Several critical elements, in wide concentration ranges, must be determined on a routine basis for such samples. The Agilent 5100 Synchronous Vertical Dual View (SVDV) ICP-OES with Dichroic Spectral Combiner (DSC) technology, has the ability to keep up with these demands, performing axial and radial measurements in a single reading, leading to faster sample throughput times. With faster sample run times, the 5100 SVDV requires less argon per sample, meaning significant savings can be made for labs involved in high throughput analysis. The Vista Chip II detector used in the 5100 ICP-OES has the fastest processing speed (1 MHz) of any charge coupled device (CCD) detector used in ICP-OES. It delivers fast warm-up, high throughput, high sensitivity, and the largest dynamic range. This application note describes the quantitation of Al, B, Ba, Ca, Cu, Fe, K, Mg, Mn, P, S, Sr and Zn in microwave acid digested alfalfa, corn and sugarcane samples and an apple leaves certified reference material (SRM NIST 1515), using the Agilent 5100

本文用HR-PQ9000测定了以王水分解的3个不同铁基合金纤维中的22个非基体成分。其有常量、微量和痕量，有金属、非金属和稀土，有检出的也有未检出的。经基体匹配的高、低浓度标准曲线均极完美。常量组分的平行样和同一元素的不同谱线都测得极其一致，微量组分的同一元素不同谱线也都测得极其相近。检测数据和峰图无不充分证明了高分辨率、垂直炬管双向观测、四种测量方式、最佳的轴向观测和高灵敏度等仪器的优异性能。

The determination of the elemental composition in plants is important for development, growth and maintenance of plant tissues. Elements, such as Al, B, Ba, Ca, Cu, Fe, K, Mg, Mn, S, Sr, P, and Zn, are important for plant nutrition, being vital nutrients required for tissue development, maintenance and plant metabolism [1]. The determination of macro, micronutrients and contaminants in plant samples is important to keep up with sources of nutrients and minerals. The chemical analysis of plant materials can be applied to assist in the remediation of contaminated soils or to solve mineral malnutrition, a problem that seriously affects the human population [2, 3]. Inductively coupled plasma optical emission spectrometry (ICP-OES) is an attractive technique for this analysis because it can accommodate the wide concentration ranges typical of macro and micronutrients in plants. 2 Agronomical laboratories typically deal with large batches of samples. Several critical elements, in wide concentration ranges, must be determined on a routine basis for such samples. The Agilent 5100 Synchronous Vertical Dual View (SVDV) ICP-OES with Dichroic Spectral Combiner (DSC) technology, has the ability to keep up with these demands, performing axial and radial measurements in a single reading, leading to faster sample throughput times. With faster sample run times, the 5100 SVDV requires less argon per sample, meaning significant savings can be made for labs involved in high throughput analysis. The Vista Chip II detector used in the 5100 ICP-OES has the fastest processing speed (1 MHz) of any charge coupled device (CCD) detector used in ICP-OES. It delivers fast warm-up, high throughput, high sensitivity, and the largest dynamic range. This application note describes the quantitation of Al, B, Ba, Ca, Cu, Fe, K, Mg, Mn, P, S, Sr and Zn in microwave acid digested alfalfa, corn and sugarcane samples and an apple leaves certified reference material (SRM NIST 1515), using the Agilent 5100