4L超纯色谱级甲醇

检测项目Test Items

单位Units

指标要求Specifications

含量Assay CH₃OH(GC)

%

≥99.99

密度Density(20℃)

g/mL

0.791～0.793

与水混合试验Solubility with H₂O

合格Pass test

蒸发残渣Residue on evaporation

%

≤0.0001

水分Water

%

≤0.03

酸度Acidity(as H⁺)

mmol/g

≤0.0002

碱度Alkalinity(as OH^-)

mmol/g

≤0.0001

吸光度Absorbance at 205 nm

AU

≤1.0

吸光度Absorbance at 210 nm

AU

≤0.60

吸光度Absorbance at 220 nm

AU

≤0.20

吸光度Absorbance at 230 nm

AU

≤0.10

吸光度Absorbance at 250 nm

AU

≤0.02

吸光度Absorbance at 400nm

AU

≤0.005

梯度洗脱试验：254nm所有峰的吸光度Gradient Elution Test

mAU

≤2

梯度洗脱试验：235nm所有峰的吸光度Gradient Elution Test

mAU

≤2

荧光杂质Fluorescence impurityat 254 nm

ppb

≤1.0

荧光杂质Fluorescence impurity at 365 nm

ppb

≤1.0