优瓦十水四硼酸钠(硼砂)分析对照品 广州优瓦仪器有限公司4000-868-328 专注进口标准品
优瓦十水四硼酸钠(硼砂)分析对照品 十水四硼酸钠(硼砂) Sodium Tetraborate (Borax), pH NIST 30 g 酒石酸氢钾 Potassium Hydrogen Tartrate, pH NIST 60 g 四草酸钾 Potassium Tetroxalate Dihydrate pH Standard NIST 65 g pH值标准 pH Standards, (set of 191d-I + 191d-II) NIST 1 bottle x25g;1bottlex30g 硝酸钾 Potassium Nitrate(需清关) NIST 90 g 硅铁高纯硅级 Ferrosilicon (75% Si-HP Grade)(需清关) NIST 75 g 低碳铬铁 Ferrochromium, Low Carbon NIST 100 g 硅砖(C22) Silica Brick NIST 45 g 硅砖(C23) Silica Brick NIST 45 g 磷酸二氢钾 Potassium Dihydrogen Phosphate, (KH2PO4) NIST 90 g 甲苯 Toluene Liquid Density(需清关) NIST 4x5 mL 钨精 Tungsten Concentrate NIST 100 g 黑曜石岩 Obsidian Rock NIST 35 g 优瓦十水四硼酸钠(硼砂)分析对照品
|