Native and modified synthetic oligonucleotides were purified by reversed-phase HPLC using volatile ionpairing mobile phases. Purification of 10 -90 nmol of oligonucleotides in a single injection was demonstrated using a 4.6 ุ 75-mm HPLC column packed with porous 2.5 m C18 sorbent. Separation of targ
Separation and detection of polar cuticular components from Oriental tobacco leaf by integration of normal-phase liquid chromatography fractionation with reversed-phase liquid chromatography-mass spectrometry
โ Scribed by Li Ding; Fuwei Xie; Guowang Xu; Kejian Liu; Sheng Wang; Jianping Xie
- Publisher
- John Wiley and Sons
- Year
- 2010
- Tongue
- English
- Weight
- 369 KB
- Volume
- 33
- Category
- Article
- ISSN
- 1615-9306
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โฆ Synopsis
Abstract
Integration of normalโphase LC (NPLC) fractionation with RPLCโESI/MS was established to detect the polar fractions of cuticular components from Oriental tobacco leaf. NPLC was selected for the fractionation of polar components of cuticular leaf extract, after being concentrated with rotary evaporator, each of the enriched fractions was further analyzed by RPLCโESI/MS. In total, 83 compounds were finally detected including 45 cembranoids, 15 labdanoids, 20 sucrose esters, and 3 glucose esters (or fructose esters). Three cembranoids and seven labdanoids possibly are new diterpenoids. Glucose esters (or fructose esters) are also reported in Nicotiana tobacco for the first time__.__
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