trifluoroacetic

常见例句

• Trifluoroacetic acid (TFA) is a commonly used ion-pair reagent in RP-HPLC to improve peak shape and enhance separation efficiency of peptides.
  在逆相液相层析分离胜肽上常会添加少量的三氟醋酸(TFA)，利用它与带正电的胜肽有离子对效应，会提升胜肽的疏水性，进而增加胜肽与静相之间的作用力，使分析物层析峰较对称，解析度较高。
• To trifluoroacetic acid as a catalyst, in solvent-free under the condition of the THC for three cyclopentadiene isomerization.
  以三氟甲磺酸为催化剂，在无溶剂的条件下对四氢三环戊二烯进行异构化反应。
• 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乙腈为流动相;应用HPLC-PDAD建立了茶叶中未衍生化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.
  以丙烯腈和丙酮为原料,探索以三氟乙酸和浓硫酸组成的混酸作催化剂合成双丙酮丙烯酰胺工艺。
• 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.
  而对于疏水性较强的多肽来说，在三氟乙酸洗脱后换用极性较弱的溶剂进行洗脱更有利于提高合成多肽的总收率。
• More hydrophilic peptide could be eluted by polarer solvents efficiently.Its recovery rate could be improved by increasing trifluoroacetic acid wash times.
  结果表明，洗脱溶剂对多肽的洗脱效果与多肽及溶剂的极性有关：亲水性较强的多肽用极性较强的溶剂洗脱时效果较好，可用增加三氟乙酸的洗脱次数来提高这类多肽的洗脱率；
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