Derivatized HPLC-UV method for the determination of mesylate in methanesulfonic acid
A technology of mesylate and methanesulfonic acid is applied in the field of derivatization HPLC-UV method for the determination of mesylate in methanesulfonic acid, and the derivatization HPLC-UV method for the determination of mesylate, which can solve problems such as low sensitivity and the like , to achieve the effect of good stability, good linear relationship and good specificity
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[0039] 1.3. Solution preparation
[0040] Preparation of mesylate stock solution and series of mixed stock solutions:
[0041] Methyl methanesulfonate stock solution: Take about 25mg of methyl methanesulfonate, weigh it accurately, place it in a 25mL measuring bottle, dilute to the mark with N,N-dimethylacetamide, and shake well.
[0042] Ethyl methanesulfonate stock solution: take about 25mg of ethyl methanesulfonate, weigh it accurately, put it in a 25mL measuring bottle, dilute to the mark with N,N-dimethylacetamide, and shake well.
[0043] Series of mesylate mixed stock solutions: Precisely pipette equal amounts of methyl methanesulfonate stock solution and ethyl methanesulfonate stock solution, put them in a 10mL measuring bottle, add N,N-dimethylacetamide to scale, diluted into a series of mixed stock solutions containing the same concentration of methyl methanesulfonate and ethyl methanesulfonate (1.5, 2.5, 5, 10, 25, 100, 250 μg / mL).
[0044] Preparation of derivati...
Embodiment 1
[0049] The comparison of embodiment 1 derivatization reagent
[0050] Precisely pipette three times, each time 100 μL of mesylate mixed stock solution with a concentration of 250 μg / mL, place them in three 5 mL volumetric flasks, add 200 μL of water and 500 μL of dithiocarbamate derivatization test in sequence solution, add N,N-dimethylacetamide to dilute to the mark, vortex for 10s, and shake well. Heated in a water bath at 80°C for 1 hour, took it out and allowed it to cool to room temperature, filtered, and injected 20 μL into HPLC-DAD for sample analysis.
[0051] HPLC-DAD conditions: Shimadzu LC 20AT liquid chromatograph (including online vacuum degasser, binary gradient pump, autosampler, column oven, DAD detector and LC-solution chromatographic workstation); chromatographic conditions are the same as those in 1.4 Description; DAD scanning wavelength: 200-400nm.
[0052] The ultraviolet maximum absorption wavelengths of the derivatization products generated by the thre...
Embodiment 2
[0053] Identification of Example 2 Derivatization Products
[0054] Precisely pipette 100 μL of mesylate mixed stock solution with a concentration of 250 μg / mL, place it in a 5 mL volumetric flask, add 200 μL of water and 500 μL of DDTC derivatization test solution in turn, add N,N-dimethylacetamide to dilute to Scale, vortex for 10 s, and shake well. Heated in a water bath at 80°C for 1 hour, took it out and allowed it to cool to room temperature, filtered, and injected 20 μL into HPLC-MS for sample analysis.
[0055] HPLC-MS conditions: Agilent 6224-TOF high performance liquid chromatography-precision mass spectrometry; Chromatographic conditions are the same as described in 1.4; Mass spectrometry ion source: ESI (+); Scanning range: m / z 90-230; Dry gas (N 2 ) flow rate: 8.0L / min; drying gas temperature: 325°C; capillary voltage: 3.5kV; resolution: 200,000.
[0056] High-performance liquid chromatography precision mass spectrometry results are: the measured molecular weigh...
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