用高效液相色谱法测定柑桔皮精油中β－胡萝卜素含量

A new simple and rapid quantitative,emethod was established for the determination of β-carotene in citruspeei oil by means of reversed-phase HPLC with ODS column and methanol/chloroform(90:10)eluate。 There covery for standards was 96.4%。The content of β-carotene in citrus oil from Huangyan was 7.7mg/100mL.     

共振论在光谱、极谱行为等轨道相关性质上的定量应用及其与分子轨道理论的一致

本文将价键理论的图解式语言(即共振论)成功地定量用于一系列所谓与轨道相关的激发态性质上,如紫外谱的p带及β带,极谱氧化及还原半波电位等.以分子基态和激发态的Kekule式作为相应波函数的基,证明In(激发结构计数/基态结构计数)与上述性质有线性关系.实际计算结果,对多环芳烃与实验的相关皆为良 (|γ|>0.95).而对共轭同系烯、炔系及并苯系,近150个系列的计算为优达85％以上 (|γ|≥0.99),其余皆为良(|γ|>0.95).     

气相色谱－质谱法测定各种柑桔籽油中脂肪酸的含量

Five fatty acids in orange oils were separated and identified with GC/MS and 9. 12-Octadecadiexioic acidin the oils was quantitated with HPLC.     

柑桔皮中微量元素的ICP－AES测定方法研究

本文采用ＩＣＰ－ＡＥＳ定量测定柑桔皮精油及柑桔皮渣中微量元素。对４种柑桔皮精油及７种柑桔皮渣中硼、镉、铬、铜、铁、锰、钼和锌进行测定。８种微量元素的样品加标回收率为８６％－１０８％，并且在测定过程中有很好的重现性。本法快速、简便、准确     

QUANTITATIVE APPLICATION OF RESONANCE THEORY ON EXCITED STATE BEHAVIOURS AND ITS CONSISTENCY WITH MOLECULAR ORBITAL THEORY

Rcsonance theory, the graphic language of valence bond theory, has been applied quantitatively and successfully to a series of excited state behaviours, the so-called properties related to molecalar orbits, such as the p-bands and β-bands of UV spectra, the oxidation and reduction half-wave potentials of polarography. By taking the Kekulé formulae of ground and excited state of molecules as the bases of corresponding wave functions, it is evidenced that the values of ln(excited structure count/ground structure count) correlate lineally with the above-mentioned properties. In practice, the correlations between calculations and experiments of polycyclic aromatic hydrocarbons are all good (|γ|>0.95). On conjugated polyene, polyyne and benzenoid polyacene homologs, the series with excellent correlation among the 150 calculated series exceed 85% (|γ|≥0.99), and for the remainder series, the correlations are all good (|γ|>0.95).