LC-MS Grade Methanol

Test Items

Specification

Assay CH₃OH (by GC) , ω / %

99.90 min

Residue on evaporation , ω / %

0.0001 max

Water(by K-F) , ω / %

0.02 max

Titrable Acid(H⁺) , (mmol/g)

0.0003 max

Titrable Base(OH^-) , (mmol/g)

0.00008 max

Fluorescence impurity,ppb

1 max

UV Absorbance

(1cm cell vs. water)

at 205 nm

1.00 max

at 210 nm

0.60 max

at 220 nm

0.30 max

at 230 nm

0.15 max

at 240 nm

0.05 max

at 254 nm

0.01 max

at 260 nm

0.01 max

(AU)

Gradient Elution Test at 254nm

0.002 max

LC-MS(ESI⁺) as reserpine，ppb

50 max

LC-MS(ESI^-) as 4-nitrophrnol,ppb

50 max

(Ag、Ba、Cd、Co、Cr、Cu、Fe、Mn、Ni、Pb、Sn),ppb

5 max

(K、Mg),ppb

10 max

(Al、Ca、Na),ppb

50 max