UHPLC-MS甲醇(货号:14262-1L)

特点：

• 
  通过更严格的UHPLC测试，极低的背景基线和杂质干扰（如邻苯二甲酸酯和聚乙二醇等）


• 
  通过UHPLC-MS TOF正离子和负离子模式测试，在模式切换时不会产生剧烈的基线漂移


• 
  包装于白色硅硼酸盐玻璃瓶中，有效避免碱金属加合物的生成


• 
  经0.1 μm膜过滤，不增加溶剂产生的背压


• 
  极高的批次重现性

grade LC-MS Ultra CHROMASOLV®

vapor density 1.11 (vs air)

vapor pressure 410 mmHg ( 50 °C)

  97.68 mmHg ( 20 °C)

assay ≥99.9% (GC)

autoignition temp. 725 °F

quality tested for UHPLC-MS

shelf life  (limited shelf life, expiry date on the label)

expl. lim. 36 %

total impurities ≤0.0001% free alkali (as NH3)

  ≤0.0001% non-volatile

  ≤0.002% free acid (as CH3COOH)

  ≤0.03% water

  ≤0.3 ppb fluorescence (as quinine) at 365 nm

  ≤0.5 ppb fluorescence (as quinine) at 254 nm

transmittance 210 nm, ≥40%

  220 nm, ≥65%

  230 nm, ≥80%

  260 nm, ≥98%

refractive index n20/D 1.329(lit.)

bp 64.7 °C(lit.)

mp −98 °C(lit.)

density 0.791 g/mL at 25 °C(lit.)

cation traces Al: ≤0.02 mg/kg

  Ca: ≤0.05 mg/kg

  Fe: ≤0.02 mg/kg

  K: ≤0.05 mg/kg

  Mg: ≤0.02 mg/kg

  Na: ≤0.1 mg/kg

abs. UHPLC-gradient/220 nm ≤15 mAU (drift)

  UHPLC-gradient/220 nm ≤8 mAU (peak)

  UHPLC-gradient/235 nm ≤4 mAU (peak)

  UHPLC-gradient/235 nm ≤8 mAU (drift)

suitability passes test for suitability for UHPLC-MS