Content determination method of mometasone furoate cream
A technique for measuring mometasone furoate and its determination method, which is applied in the field of content determination of mometasone furoate cream, can solve problems such as inability to adapt to product quality detection, small separation, and inability to accurately determine product content, achieving high sensitivity and easy operation. Simple and specific effect
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Embodiment 1
[0057] Embodiment 1 chromatographic conditions and system suitability test
[0058] Use octylsilane bonded silica gel as filler (4.6mm×250mm, 5μm or equivalent performance chromatographic column); use methanol-water (65:35) as mobile phase; flow rate is 1.0ml / min; column temperature is 25°C , the detection wavelength is 254nm. Take about 50mg of mometasone furoate, put it in a 50ml measuring bottle, add an appropriate amount of methanol, shake or sonicate to dissolve, add 5ml of 3mol / L hydrochloric acid solution, let it stand at room temperature for 4 hours, add 5ml of 3mol / L sodium hydroxide solution, and use Dilute methanol to the mark, shake well, accurately measure 2ml, put it in a 10ml measuring bottle, dilute to the mark with diluent [methanol-water-glacial acetic acid (65:35:0.2)], shake well, and use it as a system suitability solution.
[0059] Take the system suitability solution for five consecutive injections, 20 μL each time, record the chromatogram, and determin...
Embodiment 2
[0066] The assay method of embodiment 2 mometasone furoate cream
[0067] (1) Preparation of internal standard solution: take an appropriate amount of beclomethasone dipropionate, add acetonitrile to dissolve and dilute to a solution containing about 0.5 mg per 1 mL, to obtain final product;
[0068] (2) Preparation of reference substance solution: Take an appropriate amount of mometasone furoate reference substance, accurately weighed, add acetonitrile to dissolve and quantitatively dilute to make a solution containing about 0.14mg per 1mL, to obtain solution 1, accurately measure 15mL, and accurately measure Add 15 mL of the internal standard solution obtained in step (1), shake well, accurately measure 5 mL, place in a 10 mL measuring bottle, dilute to the mark with diluent [methanol-water-glacial acetic acid (65:35:0.2)], shake well, and use as Reference substance solution;
[0069] (3) Preparation of the test solution: Take an appropriate amount of mometasone furoate cre...
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