Table 1 Characteristic peaks of IR standard spectra for three different HPLC solvents and NaH2PO4.
Mobile phase | Characteristic Peaks (cm−1) | ||||
---|---|---|---|---|---|
methanol | 663.62 | 1029.39 | 1115.32 | 1449.9 | 2044.68 |
(γ-CHO) | — | — | (δas -CH3) | — | |
2522.34 | 2832.48 | 2944.75 | 3341.19 | ||
— | (ν-CH3) | (ν-CH3) | (ν-OH) | ||
acetonitrile | 749.31 | 918.88 | 1039.25 | 1376.03 | 1446.51 |
— | — | — | (δs-CH3) | (δas -CH3) | |
2252.43 | 2292.35 | 2944.08 | 3002.76 | 3164.29 | |
(ν-CN) | — | (ν-CH3) | — | — | |
H2O | 699.76 | 1646.77 | 2140.01 | 3424.1 | |
(ρH2O) | (δH2O) | — | (νH2O) | ||
NaH2PO4 | 874.43 | 934.39 | 991.36 | 1060.21 | 1130.45 |
— | (νP-OH) | (νP-OH) | (νas-PO4) | (νs-PO2) | |
1165.18 | 1287.51 | 2399.59 | 2782.90 | ||
— | (νas-PO2) | (ν-PH) | (νP-OH) |