trifluoroacetic

常見(jiàn)例句

• Trifluoroacetic acid (TFA) is a commonly used ion-pair reagent in RP-HPLC to improve peak shape and enhance separation efficiency of peptides.
  在逆相液相層析分離勝肽上常會(huì)添加少量的三氟醋酸(TFA)，利用它與帶正電的勝肽有離子對(duì)效應(yīng)，會(huì)提升勝肽的疏水性，進(jìn)而增加勝肽與靜相之間的作用力，使分析物層析峰較對(duì)稱，解析度較高。
• To trifluoroacetic acid as a catalyst, in solvent-free under the condition of the THC for three cyclopentadiene isomerization.
  以三氟甲磺酸為催化劑，在無(wú)溶劑的條件下對(duì)四氫三環(huán)戊二烯進(jìn)行異構(gòu)化反應(yīng)。
• Using trifluoroacetic acid and acetonitrile as the mobile phase,underivatized L-theanine in six categories of tea extracts were analyzed by HPLC-PDAD.
  以0.;05%25三氟乙酸和50%25乙腈為流動(dòng)相;應(yīng)用HPLC-PDAD建立了茶葉中未衍生化L-茶氨酸的分析方法。
• Diacetone acrylamide was synthesized with acrylonitrile and acetone as raw material and with trifluoroacetic acid and concentrated sulfuric mixed acid as catalyst.
  以丙烯腈和丙酮為原料,探索以三氟乙酸和濃硫酸組成的混酸作催化劑合成雙丙酮丙烯酰胺工藝。
• As regard to the peptide of high hydrophobicity, the less polar solvents could improve its recovery rate when used as eluents after the trifluoroacetic acid treatments.
  而對(duì)于疏水性較強(qiáng)的多肽來(lái)說(shuō)，在三氟乙酸洗脫后換用極性較弱的溶劑進(jìn)行洗脫更有利于提高合成多肽的總收率。
• More hydrophilic peptide could be eluted by polarer solvents efficiently.Its recovery rate could be improved by increasing trifluoroacetic acid wash times.
  結(jié)果表明，洗脫溶劑對(duì)多肽的洗脫效果與多肽及溶劑的極性有關(guān)：親水性較強(qiáng)的多肽用極性較強(qiáng)的溶劑洗脫時(shí)效果較好，可用增加三氟乙酸的洗脫次數(shù)來(lái)提高這類多肽的洗脫率；
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