Determination method and application of ephedrine hydrochloride content in Maxing Shigan Oral Liquid
A technology of Shigan oral liquid and ephedrine hydrochloride, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve problems such as inability to separate ephedrine and pseudoephedrine, long sample analysis time, inaccurate content determination, etc., to achieve good guidance for production , Improving quality control standards, strict and reasonable process control
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[0036] (2) Preparation of reference substance solution
[0037] Accurately weigh 10 mg of ephedrine hydrochloride reference substance, put it in a 100 ml measuring bottle, dissolve and dilute to the mark with 0.1% hydrochloric acid methanol, and shake well. Accurately measure 2ml, put it in a 10ml measuring bottle, dilute to the mark with mobile phase, shake well, and obtain (every 1ml contains 20 μg of ephedrine hydrochloride).
[0038] (3) Preparation of the test solution
[0039] Precisely measure 1ml of this product, put it in a 25ml measuring bottle, add mobile phase to dilute to the mark, shake well, and you get it.
[0040] (4) measure the content of ephedrine hydrochloride in need testing solution
[0041] Accurately draw 5 μl each of the reference substance solution and the test solution respectively, inject it into the liquid chromatograph, measure it, and obtain it.
[0042] The content index of ephedrine hydrochloride in Maxing Shigan oral liquid of the present ...
Embodiment 1
[0045] Embodiment 1: the assay of ephedrine hydrochloride
[0046] (1) Instruments and reagents, samples
[0047] Instrument: Waters UPLCACQUITY system, WATERSACQUITY UPLC BEHC18 chromatographic column (2.1×50mm, 1.7μm).
[0048] Reagents: Acetonitrile is chromatographically pure; water is double distilled water; other reagents are analytically pure.
[0049] Reference substance: ephedrine hydrochloride was purchased from China Veterinary Drug Administration.
[0050] Sample: The sample of Maxing Shigan Oral Liquid was produced by Luoyang Huizhong Veterinary Medicine Co., Ltd.
[0051] (2) Selection of mobile phase
[0052] Mobile phase 1: 0.1% phosphoric acid-acetonitrile (95:5);
[0053] Mobile phase 2: 0.1% phosphoric acid (containing 0.1% triethylamine)-acetonitrile (95:5);
[0054] Mobile phase 3: 0.02mol / L potassium dihydrogen phosphate (containing 0.1% triethylamine, phosphoric acid to adjust pH to 2.5)-acetonitrile (95:5);
[0055] Mobile phase 4: 0.02mol / L ammoniu...
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