蒽二硼酸二频哪酯

Dionex BorateTrap 硼酸盐捕获柱 对于使用HPAE-PAD检测IC碳水化合物分析中最佳的性能，使用的Thermo Scientific戴安BorateTrap在线捕获柱除去硼酸盐污染。当放置洗脱液泵和注射阀，陷阱上的碳水化合物分析物的效率或保留时间没有影响之间。的戴安BorateTrap柱消除了甘露糖，果糖，以及从硼酸污染引起糖醇峰拖尾。 Dionex BorateTrap 硼酸盐捕获柱订货信息：Borate Trap Column047078 The BorateTrap™ is an in-line trap column, and is recommended for optimal performance during carbohydrate analysis.In-line trap column removes borate contamination for HPAE-PAD.Eliminates peak tailing for mannose, fructose, and sugar alcohols resulting from borate contamination. Borate contamination in eluents can cause a significant loss of peak efficiency, especially for mannose, fructose, and reduced monosaccharides. If borate is present in the eluent, it binds both to the anion-exchange column and to the carbohydrate analytes. The carbohydrate-borate complex is less efficiently eluted from the anion-exchanger than is the carbohydrate, resulting in peak tailing, particularly where vicinal cis hydroxyl groups are present,such as for mannose and sugar alcohols. The BorateTrap eliminates peak tailing for mannose, fructose, and reduced monosaccharides, resulting from contamination of the eluent from borate. Therefore, the BorateTrap is highly recommended for optimal performance during carbohydrate analysis.The BorateTrap is a 4 × 50 mm column placed between the eluent pump and the injection valve to remove borate contamination from eluents used for HPAE-PAD. Because it is placed before the injection valve, it has no effect on the efficiencies or retention times of the carbohydrate analytes. This column is packed with a 20-μm high-capacity resin that has high selectivity for borate. The resin used in the BorateTrap is functionalized with a polyol capable of complexing borate in the presence of hydroxide. Borate is a known contaminant in laboratory water supplies. In chromatography, borate contamination of HPLC eluents may be a result of degrading deionized water systems or as leachate from borosilicate glassware.Effect of Borate and the BorateTrap Column on Monosaccharide Peak Symmetry.Data SheetsCarboPac MA1 Column for Carbohydrate Alditol and Aldose Analysis Data SheetCarboPac PA1 and PA10 Columns for Mono- and Disaccharide Analysis Data SheetCarboPac PA20 Column Data SheetManualsBorateTrap Column ManualCarboPac MA1, PA1, PA10, and PA100 Analytical Columns ManualCarboPac PA20 Analytical Column ManualTechnical NotesTN 40: Glycoprotein Monosaccharide Analysis Using HPAE-PAD with Eluent Generation

纳微推出新一代硼酸亲和填料，它是利用硼酸与顺式二羟基化合物之间的共价配位作用实现分离纯化。在碱性条件下，硼酸基团能与顺式二羟基结构作用，生成稳定的五元环络合物，分子被介质吸附；在酸性条件下络合被打开，分子从介质上解吸附。硼酸亲和层析介质可以用于含有顺式二羟基化合物的分离纯化，如糖蛋白、核苷、核苷酸、糖类等的分离纯化。UniPB-80L硼酸亲和层析介质的优势单分散微球基质，低反压，高线性流速，提高生产效率高配基密度，提供更高的操作载量使用寿命长，生产成本低硼酸亲和层析介质基本参数 *对于特殊规格，提供专业化客户定制订货信息 *更多规格型号或定制，请联系业务代表

上海新诺 荧光专用硼酸模具 钢环模具 粉末压制模具 压片机配件一、模具概述：X荧光专用硼酸模具是用硼酸粉末包裹住样品然后将粉末压制成型，主要用于X射线荧光光谱仪（XRF）测试样品的快速成型制备样品使用，可替代同类进口产品。目前市场上常见的硼酸模具规格尺寸有两种：首先常见的尺寸是：Ф40-Ф32mm，即外径Ф40mm，样品尺寸Ф32mm，40-32=8，即包裹样品的硼酸尺寸为8mm。其次就是：Ф32-Ф24mm，即外径Ф32mm，样品尺寸Ф24mm，32-24=8，即包裹样品的硼酸尺寸也为8mm。压片厚度高为5-8mm。其它特殊模具尺寸、规格、形状、材质等可根据客户需求定做。二、主要技术指标：模具名称MJX-PS型 X荧光专用硼酸模具成型样品实图压制样品形状圆形（硼酸包裹）模具规格 Ф32-24mmФ40-32mm模具组成结构底座，模具套，压杆，硼酸分离罩，压饼等模具材质合金工具钢Cr12MoV模具压头硬度HRC60-HRC62模具腔体深度45mm模具外形尺寸Ф73×133mm模具重量3.2kg模具压强计算公式油缸的面积/模具的面积×压力表读数=模具的实际承受压强（Mpa）友情提示 以上指标仅供参考，部分现货，可根据客户需求定制各种规格、形状、材质的模具 模具名称MJX-GH型 X荧光专用钢环模具成型样品实图压制样品形状圆形（外包钢环）模具规格 Ф32-24mmФ40-32mm模具组成结构底座，模具套，钢环，压杆，退膜套模具材质合金工具钢Cr12MoV模具压头硬度HRC60-HRC62模具腔体深度45mm模具外形尺寸Ф73×133mm模具重量3.2kg模具压强计算公式油缸的面积/模具的面积×压力表读数=模具的实际承受压强（Mpa）友情提示以上指标仅供参考，部分现货，可根据客户需求定制各种规格、形状、材质的模具本公司商品信息均来自于厂商提供资料、网页、宣传册等，质量可靠，保证正品！但由于新广告法规定不得出现绝对化和功能性描述用词，以及写有没写号或已过期等情况，我司已在逐步排查和修改完善。也欢迎用户协助反馈，我司将赠送精美小礼品一份。并在此郑重表态：我司所有页面存在的极限词或违禁词全部失效，不接受不妥协以任何形式的“打假名义”进行网络欺诈，请为真正的消费者让路，也请各位职业“打假高手”高抬贵手。