产品名称: 专业核磁NMR溶剂 规 格: Sigma-Aldrich 产品备注: Sigma-Aldrich 产品类别: 标准品 产 品 说 明 大部分核磁NMR溶剂国内备有现货! Anhydrous NMR Solvents Product # Description 569550 乙腈-D3 99.8 atom % D, anhydrous 570672 二甲亚砜-d6 anhydrous, 99.9 atom % D 569585 二甲亚砜-d6 99.9 atom % D, anhydrous 709433 四氢呋喃-d8 99.5 atom % D, anhydrous 570699 氯仿-d 99.8 atom % D, anhydrous 570710 甲苯-d8 anhydrous, 99.6 atom % D 569534 甲醇-d4 anhydrous, 99.8 atom % D 570729 甲醇-d4 99.8 atom % D, anhydrous 570680 苯-d6 anhydrous, 99.6 atom % D "Special HOH" Solvents Product # Description 699551 丙酮-D6 "Special HOH", 99.9 atom % D 699543 乙腈-D3 "Special HOH", 99.8 atom % D 612324 二甲亚砜-d6 "Special HOH", 99.9 atom % D 716731 二甲亚砜-d6 "Special HOH", 99.9 atom % D "Ultra" and "Extra" Enriched D2O Product # Description 613398 氧化氘 extra, 99.994 atom % D 658871 重水 ≥99.999 atom % D
全系列边界泵送MRV标油,符合ASTM D 3829 和 ASTM D 4684。 Viscosity Standard:N105B Approximate Viscosity in mPa·s (Centipois):CMRV viscosity standard, 30,000 mPa·s (cP) at –20°C; 56,200 mPa·s (cP) at –25°C
产品名称: 欧洲药典EP 规 格: EP 产品备注: 产品类别: 标准品 产 品 说 明 《欧洲药典》为欧洲药品质量检测的惟一指导文献。所有药品和药用底物的生产厂家在欧洲范围内推销和使用的过程中,必须遵循《欧洲药典》的质量标准。 《欧洲药典》由欧洲药品质量管理局(EDQM)负责出版和发行,欧洲药典委员会1964年成立。 EP可提供1900多个参考标准品,欧洲药典个论规定并正式有效,包含化学物质、生物制品和对照图谱。 欧洲药典标准品质量和可靠性的保证,EDQM实验室按EP个论规定方法选择和检查参考标准品批号及其制备, 其官方报告由欧洲药典委员会批准。 需注意,欧洲药典标准品由于已通过欧洲药品委员会认证,故标准品不随带证书(见《欧洲药典关于标准品证书的声明》),纯度和有效期见以下介绍。 欧洲药典关于纯度和有效期的说明: 关于有纯度:一般可作为100%使用,详见以下描述。 TOPICS : 03- Ph.Eur. REFERENCE STANDARDS (CRS/BRP) / 01- General / 05. How can I find out the assay/content of a CRS? You can obtain it from our catalogue of reference standards, which is available at http://CRS.edqm.eu. If the content is not required to perform the test(s) described in the Ph.Eur. monograph (see also the FAQ about "What is the intended use of CRS/BRP?"), it is not indicated in the catalogue or on the label (or on the leaflet) and you cannot assume the content of a CRS to be 100% for a quantitative test. However, when an impurity reference standard is used in a related substances test for the control of impurity, if no assigned content is stated on the label, the purity of the reference standard, for the purpose of this estimation, is considered to be 100 per cent. 关于有效期: TOPICS : 03- Ph.Eur. REFERENCE STANDARDS (CRS/BRP) / 01- General / 04. How do we find out the Expiry date of CRS/BRP? No expiry date is indicated as European Pharmacopoeia Reference Standards are monitored regularly. It is down to the user to demonstrate that the CRS/BRP used in an official Ph. Eur. test or assay was current at the time of use. The “information” column of the catalogue may indicate an official date on which the batch is no longer valid as a CRS/BRP. Therefore, it is recommended to purchase only a sufficient amount for immediate need and to use the products as soon as possible. Moreover, the stability of the contents of opened vials or ampoules cannot be guaranteed 北京美同达公司可以提供EP所有系列产品,满足广大客户的使用要求。
产品名称: VWR瓶口分液器 2-10ML PTFE镀膜活塞 规 格: 612-3669/612-3670/612-3671 产品备注: VWR 产品类别: 通用实验室仪器设备 产 品 说 明 Variable volume, autoclavable The standard PP units with glass cylinder are suitable for aqueous liquids, dilute acids and alkalis - not for use with solvents and hydrofluoric acid which attack PP (for bottles with GL 32 thread). The glass cylinder and PTFE encased glass piston with PP body models are designed for aqueous solutions, weakly concentrated acids, alkaline solutions and crystallising liquids compatible with PP. The amber glass cylinders, clear glass piston with PP body are suitable for light-sensitive liquids, compatible with PP. Valve system with steel spring PP with precision glass cylinder Quick and easy to use volume setting system Additional rotating fine volume adjustment for right or left handed use Adaptor allows rotation of the dispenser on bottles to the desired position Glass cylinders, PTFE encased glass piston with PP body Volume Division Pk Cat. No. 10 - 50 ml 1,00 ml 1 612-3670 2 - 10 ml 0,50 ml 1 612-3669 Glass cylinders with PP standard units Volume Division Pk Cat. No. 10 - 50 ml 1,00 ml 1 612-4751 2 - 10 ml 0,50 ml 1 612-4750 Amber glass cylinders, clear glass piston with PP body Volume Division Pk Cat. No. 10 - 50 ml 1,00 ml 1 612-3672 2 - 10 ml 0,50 ml 1 612-3671 部分商品现货 北京美同达代理美国VWR耗材
Standards for Sulfur in Heavy Mineral Oil Analysis: Full-range of Sulfur Standards for XRF. ASTM Methods D2622, D4294, D5453, D7039, D7212, D7220 and others. Matrix: See Below Volume: 100mL Concentration Light Mineral Oil Heavy Mineral Oil #2 Diesel Fuel (μg/g) (wt%) Product No. Product No. Product No. Blank Blank SXF20MIN-BLK-100 SXFMIN-BLK-100 SXFDSL-BLK-100 5 0.0005 SXF20MIN-5-100 SXFMIN-5-100 SXFDSL-5-100 10 0.001 SXF20MIN-10-100 SXFMIN-10-100 SXFDSL-10-100 15 0.0015 SXF20MIN-15-100 SXFMIN-15-100 SXFDSL-15-100 20 0.002 SXF20MIN-20-100 SXFMIN-20-100 SXFDSL-20-100 25 0.0025 SXF20MIN-25-100 SXFMIN-25-100 SXFDSL-25-100 50 0.005 SXF20MIN-50-100 SXFMIN-50-100 SXFDSL-50-100 75 0.0075 SXF20MIN-75-100 SXFMIN-75-100 SXFDSL-75-100 100 0.01 SXF20MIN-100-100 SXFMIN-100-100 SXFDSL-100-100 200 0.02 SXF20MIN-200-100 SXFMIN-200-100 SXFDSL-200-100 300 0.03 SXF20MIN-300-100 SXFMIN-300-100 SXFDSL-300-100 400 0.04 SXF20MIN-400-100 SXFMIN-400-100 SXFDSL-400-100 500 0.05 SXF20MIN-500-100 SXFMIN-500-100 SXFDSL-500-100 750 0.075 SXF20MIN-750-100 SXFMIN-750-100 SXFDSL-750-100 1000 0.1 SXF20MIN-1000-100 SXFMIN-1000-100 SXFDSL-1000-100 1500 0.15 SXF20MIN-1500-100 SXFMIN-1500-100 SXFDSL-1500-100 3000 0.3 SXF20MIN-3000-100 SXFMIN-3000-100 SXFDSL-3000-100 5000 0.5 SXF20MIN-5000-100 SXFMIN-5000-100 SXFDSL-5000-100 7500 0.75 SXF20MIN-7500-100 SXFMIN-7500-100 SXFDSL-7500-100 10,000 1 SXF20MIN-1%-100 SXFMIN-1%-100 SXFDSL-1%-100 20,000 2 SXF20MIN-2%-100 SXFMIN-2%-100 SXFDSL-2%-100 30,000 3 SXF20MIN-3%-100 SXFMIN-3%-100 SXFDSL-3%-100 40,000 4 SXF20MIN-4%-100 SXFMIN-4%-100 SXFDSL-4%-100 50,000 5 SXF20MIN-5%-100 SXFMIN-5%-100 SXFDSL-5%-100 美国VHG Labs参考物质及标样主要包括:1. 氮,硫,氯,金属标准;2. 标准废油分析,单元素磨损金属有机标准,多元素金属磨损标准,内部标准,金属添加剂标准,基体空白和溶剂,稳定磨损金属标准,多元素冷却剂标准,燃料稀释标准,裂纹检测的参考标准,卡尔费休滴定认证参考标准,烟尘含量标准;3.油品物理测试标准:闪点参考资料,粘度参考标准,降凝剂参考资料,浊点参考资料,冰点参考资料,蒸馏标准等。 北京美同达代理美国销售VHG品牌所有系列标准油,超低折扣,超惠价格! 详情请致电:010-88482632/52457812/52457811
美国VHG Labs专业提供蒸馏标准油,符合ASTM D86方法。 ASTM D86蒸馏标准油分为两种,分别如下: Distillation Standards ASTM D86 Group 1 & 2 Synthetic Distillation Standard Hydrocarbons 500mL D86-500 ASTM D86 Group 4 Distillation Standard Diesel Fuel 500mL D86-4-500
美国VHG Labs专业提供烟尘含量标准油,符合 ASTM D6304,有 0.05%, 0.1%, 0.5%, 1.0%wt.% 或者空白油等各种浓度。 卡尔费休标准油列表(Karl Fischer Titration Certified Reference Standards) Karl Fischer Titration Certified Reference Standards Karl Fischer Blank 10W30 Motor Oil 100mL KF-BLK-100 Karl Fischer, Nominal Water Conc. 0.1% 10W30 Motor Oil 100mL KF-0.1%-100 Karl Fischer, Nominal Water Conc. 0.5% 10W30 Motor Oil 100mL KF-0.5%-100 Karl Fischer, Nominal Water Conc. 1.0% 10W30 Motor Oil 100mL KF-1.0%-100