trifluoroacetic

常見例句

• 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添加少量的三氟醋酸(TFA)，利用它與帶正電的勝肽有離子對效應，會提升勝肽的疏水性，進而增加勝肽與靜相之間的作用力，使分析物層析峰較對稱，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，在無溶劑的條件下對四氫三環(huán)戊二烯進行異構(gòu)化反應。
• 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乙腈為流動相;應用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.
  而對于疏水性較強的多肽來說，在三氟乙酸洗脫后換用極性較弱的溶劑進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，洗脫溶劑對多肽的洗脫效果與多肽及溶劑的極性有關：親水性較強的多肽用極性較強的溶劑洗脫時效果較好，可用增加三氟乙酸的洗脫次數(shù)來提高這類多肽的洗脫率；
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