The detection method of 16 local anesthesia ingredients in an adult external product
A detection method and local anesthesia technology, which can be used in measurement devices, material separation, and analysis of materials, etc., can solve the problem of lack of uniform quality standards for adult external products, and achieve the effects of strong practicability, improved sensitivity, and simple operation process.
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[0032] High performance liquid chromatography analysis method
[0033] Instruments and conditions:
[0034] Shimadzu LC 20-AT high performance liquid chromatograph (with diode array detector). Methanol is chromatographically pure; phosphoric acid, dipotassium hydrogen phosphate and sodium heptanesulfonate are analytically pure. The ingredients of local anesthesia are listed in Table 1.
[0035] Table 1. 16 local anesthetic standard substances
[0036]
[0037] Chromatographic column: Agilent Poroshell 120 EC-C18 (50mm×4.6mm, 2.7μm);
[0038] Flow rate: 1.5 mL / min;
[0039] Column temperature: 35°C;
[0040] Injection volume: 10 μL;
[0041] Qualitative analysis wavelength range is 200~400nm, quantitative analysis wavelength is 210nm (lidocaine, prilocaine, ropivacaine, bupivacaine and pramoxine) and 280nm (procainamide, procaine chloroprocaine, benzocaine, buprocaine, oxybucaine, tetracaine, eugenol, dibucaine, eugenol methyl ether and isoeugenol methyl ether);
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