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北京美同达科技有限公司
主营：进口标油,耗材,试剂 - 15201392873
北京美同达科技有限公司
主营：进口标油,耗材,试剂
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Standard Reference Materials?简称(SRMs)是美国国家标准技术局(National Institute of Standards and Technology，NIST)制定的“标准参照样品(SRM)”，共有1200多种，每种标样都有美国国家标准技术局的详细分析报告和用途说明，SRM标准参照样品的适用范围：(1)帮助开发准确的分析方法；(2)用于校正检测仪器，质量控制，和测定检出极限；(3)保证检测方法可靠性和长久稳定性。 美国国家标准与技术研究院(NIST)是直属于美国商务部的一个副部级的联邦**部门，原名：美国国家标准局（NBS），是美国重要的**研究机构之一。 NIST成立于1902年，主要从事物理、生物和工程方面的基础和应 用研究，以及测量技术和测试方法方面的研究，提供标准、标准参考数据及有关服务，在国际上享有很高的声誉。 NIST的科学家主要从事生物技术、化学、半导体电子学、建筑技术，陶瓷学、物理学、光电子学、防火、聚合物、信息技术、制造工程和计量科学等领域的研究。 货号 产品名称 型号规格 1d Limestone, Argillaceous 70 g 4l Cast Iron 150 g 5m Cast Iron 150 g 6g Cast Iron 150 g 8k Bessemer Steel (Simulated), 0.1 % Carbon 150 g 12h Carbon Steel, 0.4 C 150 g 13g Carbon Steel, 0.6 C 150 g 14g Carbon Steel, 0.8 C 150 g 15h Carbon Steel, 0.1 C 150 g 16f Basic Open- Hearth Steel, 1% carbon 150 g 17f Sucrose Optical Rotation 60 g 19h Carbon Steel, 0.2 C 150 g 20g Carbon Steel 150 g 25d Manganese Ore 60 g 30f LA Steel, Cr-V (SAE 6150) 150 g 32e LA Steel, Ni-Cr (SAE 3140) 150 g 33e LA Steel, Ni-Mo (SAE 4820) 150 g 36b LA Steel, Cr-Mo 150 g 39j Benzoic Acid (Calorimetric Standard) 30 g 45d Cu Freezing Point 450 g 46h Portland Cement Fineness Std 10 x 5 g 49e Lead Freezing Point 600 g 50c Tungsten-Chromium-Vanadium Steel 150 g 53e Bearing Metal (84Pb-10Sb-6Sn) 150 g 57b Silicon Metal 40 g 58a Ferrosilicon (73% Si) 75 g 59a Ferrosilicon 50 g 64c Ferrochromium, High Carbon 100 g 68c Ferromanganese, High Carbon 100 g 69b Bauxite (Arkansas) 60 g 70a Feldspar, Potash 40 g 72g LA Steel (AISI 4130) 150 g 73c Stainless Steel, Cr (SAE 420) 150 g 76a Burnt Refractory (Al203-40%) 75 g 77a Burnt Refractory (Al203-60%) 75 g 78a Burnt Refractory (Al203-70%) 75 g 79a Fluorspar, Customs Grade 120 g 81a Glass Sand 75 g 82b Cast Iron (Ni-Cr) 150 g 84k Potassium Hydrogen Phthalate 60 g 87a Aluminum-Silicon Alloy 75 g 88b Dolomitic Limestone 75 g 89 Glass, Lead Barium 45 g 92 Low-Boron, Soda-Lime Powder 45 g 93a High-Boron Borosilicate wafer 94c Zinc-Base Die Casting Alloy 150 g 97b Flint Clay 60 g 98b Plastic Clay 60 g 100b LA Steel, Manganese (SAE (T340) 150 g 101g Stainless Steel (AISI 304L) 100 g 106b LA Steel, Cr-Mo-Al (Nitralloy rG) 150 g 107c Cast Iron (Ni-Cr-Mo) 150 g 113b Zinc Concentrate 100 g 114q Portland Cement Fineness Std set (20) 115a Cast Iron (Cu-Ni-Cr) 150 g 120c Phosphate Rock (Florida) 90 g 121d Stainless Steel, Cr-Ni-Ti (AISI 321) 150 g 122i Cast Iron 150 g 123c Stainless Steel, Cr-Ni-Nb (AISI 348) 150 g 126c High Alloy Steel, High Nickel 150 g 129c LA Steel, High Sulfur (SAE 112) 150 g 131g Low Alloy Silicon Steel 150 g 132b Tool Steel (AISI M2) 150 g 133b Stainless Steel Cr-13, Mo-0.3, S-0.3 150 g 134a Tool Steel, Mo-W-Cr-V 150 g 136f Potassium Dichromate, (Oxidimetric Standard) 60 g 139b LA Steel, Cr-Ni-Mo (AISI 8640) 150 g 141d Acetanilide 2 g 142 Anisic Acid 2 g 148 Nicotinic Acid 2 g 152a Carbon Steel, 0.5 C 150 g 154c Titanium Dioxide 90 g 155 LA Steel, Cr-W 150 g 158a Bronze, Silicon 150 g 160b Stainless Steel, Cr-Ni-Mo (AISI 316) 150 g 163 LA Steel, 1.0 C 100 g 165a Glass Sand (Low Iron) 75 g 166c Stainless Steel, Carbon Only 100 g 173c Titanium Alloy (6Al-4V) 50 g 179 LA Steel, High Silicon 150 g 180 Fluorspar, High Grade 120 g 181 Lithium Ore (Spodumene) 45 g 182 Lithium Ore (Petalite) 45 g 183 Lithium Ore (Lepidolite) 45 g 185h Potassium Hydrogen Phthalate, pH Standard 60 G 186g pH Standards, (set of 186-I-g + 186-II-g) set 187e Sodium Tetraborate (Borax), pH 30 g 188 Potassium Hydrogen Tartrate, pH 60 g 191c pH Standards set (2) 193 Potassium Nitrate 90 g 194 Ammonium Dihydrogen Phosphate 90 g 195 Ferrosilicon (75% Si-HP Grade) 75 g 196 Ferrochromium, Low Carbon 100 g 198 Silica Brick 45 g 199 Silica Brick 45 g 200a Potassium Dihydrogen Phosphate 90 g 211d Toluene Liquid Density 4x5 mL 276b Tungsten Carbide 75 g 277 Tungsten Concentrate 100 g 278 Obsidian Rock 35 g 291 LA Steel, Cr-Mo (ASTM A 213) 150 g 293 LA Steel, Cr-Ni-Mo (AISI 8620) 150 g 331a Copper Ore Mill Tails 40 g 334 Gray Cast Iron (Carbon & Sulfur) 150 g 338 White Cast Iron (Carbon & Sulfur) 150 g 339 Stainless Steel, Cr-Ni-Se (SAE 30) 150 g 341 Ductile Cast Iron 150 g 342a Nodular Cast Iron 150 g 343a Stainless Steel (AISI 431) 150 g 344 HA Steel, (Mo Precipitation Hardening) 150 g 345a HA Steel, (Cu Precipitation Hardening) 150 g 346a Valve Steel 150 g 347 Magnesium Ferrosilicon 100 g 348a Hi Temp. Alloy, (A286) Ni-Cr 150 g 349a Waspaloy 150 g 350b Benzoic Acid (Acidimetric) 30 g 351a Sodium Carbonate 50 g 361 AISI 4340 Steel 150 g 363 Chromium-Vanadium Steel (Modified) 150 g 364 LA Steel, High C (mod.) 150 g **供应进口化学试剂：比利时ACROS-7折，美国Alfa-85折，美国Accustandard-7折，日本Tci-85折等，EP/USP/EP**低比价供应；标准油系列：美国cannon-65折、美国conostan-65折、美国VHG Labs-65折等；PE(珀金埃尔默）耗材较低可至7折！ 详情请致电美同达客服专线：010-52457811 / 010-88482632/ 010- 52457812 客服Q 363743915 2395792452