曬干硫熏菊花揮發(fā)性成分(文件)
【正文】 0℃ 12h Samples and preparation Volatile oils: sundried samples sulfurfumigated samples steam distillation anhydrous sodium sulfate (無水硫酸鈉 ) dark glass bottles 4℃ Apparatus and parameters TOF/MS實(shí)驗(yàn)條件 物理量 參數(shù)值 electron ionization voltage (電離能量 ) 70eV detector voltage (檢測器電壓 ) 1850V acquisition rate (采集速率 ) 100Hz mass range (質(zhì)量掃描范圍 ) 45550Da ion source temperature (離子源溫度 ) 220℃ 儀器 公司型號 GC(氣相色譜儀 ) Agilent 6890N TOF/MS(飛行時(shí)間質(zhì)譜儀 ) LECO Pegasus4D autosampler(自動進(jìn)樣器 ) Agilent 7683B GC GC實(shí)驗(yàn)條件 物理量 參數(shù)值 first dimension chromatographic column (一維色譜柱系統(tǒng) ) DB5ms, 30m m second dimension chromatographic column (二維色譜柱系統(tǒng) ) DB17ht, 2m m first column: programmed temperature (一維色譜柱升溫程序 ) 50℃(1min ) 6℃/min 250℃(10min) second column: constant temperature (二維色譜 柱恒溫 ) 260℃ inlet temperature (進(jìn)樣口溫度 ) 250℃ sample size (進(jìn)樣量 ) L split ratio (分流比 ) 20:1 carrier gas (載氣 ) helium(%) flow rate (流速 ) transfer line temperature (傳輸線溫度 ) 250℃ modulation period (調(diào)制周期 ) 6s Data processing LECO Pegasus4D software Normalization(歸一 ) of peak volume S/N(信噪比 ) threshold: 100 Similarity match threshold: 800 NIST08, Adams and Wiley6 database libraries 3. Results and discus
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鄂ICP備17016276號-1