RESUMEN
Objective To consummate a method of quality control of peppermint water .Methods Thin layer chromatog-raphy was used for the identification of peppermint oil .Gas chromatography was used for the determination of mentholum . Results The identification of peppermint oil was highly specific by TLC .The linear range of mentholum was from 5 .0-80 .0 μg/ml ,r=0 .999 9 .The average recovery of mentholum was 103 .16% and RSD was 1 .81% .Conclusion These methods were easy to operate with accurate results ,which washigh sensitivity andgoodrepeatability .This quality standard could effective-ly control the quality of peppermint water .
RESUMEN
OBJECTIVE:To establish a GC method for simultaneously content determination of camphor and mentholum in steam inhalant.METHODS:The glass packed column coated with10%PEG-20mol/L was used,the column temperature was set at120℃,the injection site temperature was160℃,the detector temperature was250℃,the carrier gas was nitrogen of high purity,the flow rate was50ml/min.RESULTS:The detected concentrations of camphor and mentholum showed a good linear correlation in the ranges of0.016～0.176mg/ml(r=0.9998)and0.04～0.44mg/ml(r=0.9999)respectively,the average recoveries were100.27%(RSD=0.79%)and100.18%(RSD=1.11%)respectively.CONCLUSION:The present method is convenient,accurate and sensitive,good resolution which can be used in simultaneously quantitative determination of camphor and mentholum in steam inhalant.