做吹扫捕集实验需要用到甲醇，大家会选择何种级别的甲醇？

应助达人

色谱级的

CNW 吹扫捕集级甲醇Specfication如下：
4.109008.1000 1L
Methanol
Purge and trap grade

Guarantee analysis
Minimum assay(G.C.) 99.9%
Density at 20/4 0.791-0.792
MAXIMUM LIMIT OF IMPURITIES
Water (by Karl Fisher) ≤0.05%
Residue on evaporating ≤1 mg/L
Colour ≤10 Hazen
Impurity Profile pass test
All aromatics ≤1 ng/mL
2-butanone ≤100ng/mL
Each of aetone and methyl isoamyl ketone ≤50ng/mL
All other detectable ketones ≤50ng/mL
Each of methylene chloride,chlorform
and carbon tetrachloride ≤50ng/mL
All other detectable chlorohydrocrabons ≤50ng/mL
Each of pentane, hexane, heptane,and isooctane ≤50ng/mL
All other detectable alkanes ≤50ng/mL
All other detectable peaks as hexane ≤50ng/mL
Suitable for volatile organics analysis by GC-MS pass test